Mixing RAM--Speed differences

Hi,
I ordered 4x1 GB DDR2 PC2-4200 non-ECC memory from an online vendor.
I recieved instead 4x1 GB DD2 PC2-3200 non-ECC memory.
I installed it and the system sees the memory but now I have a mixed bag...
DIMMO/J6700 256 MB DDR2 SDRAM PC2-4200U-444 (existing)
DIMM1/J6800 256 MB DDR2 SDRAM PC2-4200U-444 (existing)
DIMM2/J6900 1 GB DDR2 SDRAM PC2-4200U-444 (existing)
DIMM3/J7000 1 GB DDR2 SDRAM PC2-4200U-444 (existing)
DIMM4/J7100 1 GB DDR2 SDRAM PC2-3200U-288 (added)
DIMM5/J7200 1 GB DDR2 SDRAM PC2-3200U-288 (added)
DIMM6/J7300 1 GB DDR2 SDRAM PC2-3200U-288 (added)
DIMM7/J7400 1 GB DDR2 SDRAM PC2-3200U-288 (added)
Mac seems to be running ok, but what grief am I asking for running this memory configuration? Am I limiting the Mac's performance?
Help please,
cman65
Dual 2.3 GHz PowerPC G5 Mac OS X (10.4.8) 6.5 GB DD2 SDRAM

Having same type of problem. Purchased (2) PC2-4200U modules from Computer Memory Outlet for my Late 2005 Dual G5. Installed them and the System Profiler says they are PC2-3200U-288. Returned them and they sent me two replacement modules by EDGE Tech Corp, same thing.
EDGE Tech Corp Support assured me they were the correct modules for my G5. I swapped the modules with my existing (correctly listed) memory in different slot pairs. They still show up as PC2-3200U-288. All other Apple installed memory is correct.
Don't know what's going on here.

Similar Messages

Mixing RAM Speeds...No Ben Hur jokes please ;)

Is it ok to mix RAM speeds. Somehow I purchased some RAM awhile back that was PC2-3200U-255 for my Quad. Oops, I never noticed that is wasn't what came with the computer, the 4200-444. Well, I just bought some more RAM at 4200-444, and noticed that I had varying speeds. Will this variation pose any problems?
Thanks!!

Thanks for the link Josef. Very informative. Unfortunately, I am still confused (my permanent state).
So I checked my invoice from my purchase and it looks like I purchased 5300 instead of the 3200 that is showing in "System Profiler". I opened up the computer and indeed it is 5300. So, is mixing the 4200 and 5300 a no no? Is the 5300 in fact being read as 3200? And doesn't the other RAM automatically run at the lowest speed, no matter what speed is highest?
Thanks, sorry that I don't get it. I did searches and am still confused.
Slow learner,
fatlanglois

Mixing RAM Speeds In iMac G4 1GHz 17" Flat-Panel?

I'm just checking here.
I have an iMac G4 1GHz 17" Flat-Panel, Model M8935LL/A (USB 1.1 version) that currently has the standard 256MB PC2100 (266 MHz) RAM module installed in the factory slot, and a 512MB PC2700 (333 MHz) RAM module installed in the bottom (user-accessible) slot. I bought the machine direct from Apple, so despite the "official" spec (which calls for PC2100 RAM in both slots), it's obvious that Apple knows PC2700 RAM will work in that machine. My understanding is that the faster PC2700 RAM simply downclocks to accommodate the lower 266 MHz bus speed of the M8935LL/A. As I understand the DDR SDRAM spec, any DDR SDRAM (PC1600 through PC3200) module will simply overclock or underclock to accommodate the host bus speed...but feel free to correct me if I'm mistaken on that point.
I'm fixing to upgrade the hard drive to a larger capacity model. I've done it before, so I know it's no picnic. Since I have to go past the factory RAM slot anyway to change the hard drive, I figure I might as well upgrade the internal RAM to the full 1GB limit. (Yes...I know Apple says you can't exceed 512MB in either slot, so please—no remonstrances about sticking to Apple's spec. The spec is wrong.)
Obviously, it's possible to mix the two RAM speeds between the two slots, since Apple shipped the computer that way. Here are my questions:
• Is there any downside to going the other way when I upgrade the RAM—that is, putting a 1GB PC2700 (184-pin) module in the factory slot, and a 1GB PC2100 (200-pin) module in the user slot? The reason I ask is because my preferred supplier (OWC) can't supply me with both modules in the same speed.
• Is there any performance advantage in both modules being the same speed—that is, both PC2100 or both PC2700? If not, I'll just buy the one of each speed that OWC has available.
Thanks!

jjw wrote:
So, you know have 2Gb available in your flat screen imac?
Yes indeed—2GB confirmed as available by Apple System Profiler. Both modules are PC2700. Everything is working fine.
I guess I can understand why Apple discourages users from replacing the 184-pin "factory slot" module. There's not a whole lot of slack in the motherboard connector cables, so it's best to disconnect them in order to get the bottom section to lie flat on the workbench. I suppose some folks might be hesitant about disconnecting things, but it's really quite simple, and involves only three connectors. After having changed the hard drive a few years ago, replacing the RAM was a piece of cake by comparison.
A word of caution to anyone who's going to attempt it, though. There are TWO heat sink interfaces between the bottom section (where the motherboard is mounted) and the top dome. Those heat sink surfaces are coated with thermal paste at the factory, but the compound dries out over time, becoming a rubbery membrane between the heat sink surfaces. Once you separate the top and bottom sections, the membrane rips apart, and the firm connection between the heat sink surfaces is permanently gone. It's a bad idea to simply put them back together after you change the RAM module; you won't get a good thermal connection.
The solution is to scrape all of the old rubbery compound off all four surfaces (two on the bottom and two on the top section). I did it with a piece of PVC, but you can use anything with a sharp edge that won't scratch the metal surface—even your fingernails will work, unless the old compound has dried out to the point where it's hard. After you scrape the old gunk off, apply new thermal paste to all four surfaces.
The other maintenance item you can perform while you're in there is cleaning out all the dust, which accumulates in vast quantities and interferes with cooling. I vacuumed it out with a plastic crevice tool, being careful NOT to touch any of the components with the tool. Vacuuming can build up a static charge on the tool, especially in dry environments, and high static voltages aren't friendly to microprocessors. I used a securely grounded anti-static wrist strap throughout the entire operation, and even wrapped it around the vacuum tool.
Good luck!

Mixing RAM Speeds

Hi there,
I posted this in the "Using Mac" forum, but unsure how to delete it, so I reposted here! I'd like to upgrade my memory. Currently, I have the factory installed 1GB RAM. Can I mix memory speeds? For example, will I be able to put 2GB in the empty slot and still have improved performance? I went on crucial.com, which recommended this, but I wasn't sure if this would be okay.
Thanks,
Rhys

I did not know that about that group of Mac's running G4, I guess I did learned something new today
What I would like to add to all of this is also that it does matter when you deal with dual channel memory like on the Mac Pro's in that case you will have to mach the same size and speed other wise it will not read correctly.
I have had misc memory size on my MacBook Pro 15" and my iMac as well (Intels) and it was working just fine, so you wont have any issues. Although Apple does recommends you to matching pair.
I hope this answers your questions,
Goran
G.

Mixing RAM speeds in Mac Pro 3.1

I recently bought a used Mac Pro 3.1 early 2008 2xquad core 2.8 gHz. It came with 6 1 Gig 667 MHz in RAM. This Mac takes 800 MHz- can I fill one of the risers with 4x4 Gig 800 MHz while temporarily keeping 4 1 Gig in the other riser? I realize all will (should?) be running at 667 until I switch to all 800 MHz; but can they be mixed as long as they're on their own riser card? I can't afford to replace all the RAM at once, and am hoping to upgrade in waves. An extra 4 Gigs isn't much but it would really help for a short time.

I thought I/we already went through this a day or two ago, not you? then someone else.
Check it out.
Same over on MacRumors and links to ebay and Amazon
Mac Pro 3,1 memory question
And yes you can mix and match - as long as each paired set and if even one set is 667 then the memory controller will downlclock for all.
http://www.barefeats.com/harper5.html

Bus Speed and Ram Speed Question..thanks

I have recently purchased my first mac! I purchased a refurb but I noticed that the one I purchased has bus speed of 800mhz and the ram has 667mhz. (I did get a 320g hard drive vs a 250g and a 256mb graphics card vs a 128mb) The other one has bus speed of 1066mhz and ram speed has 800mhz. Am I going to notice a difference in the bus/ram speed difference or just stay with the one I purchased?
thanks

I don't think you will notice a difference. Other system factors (such as video card, system CPU clock speed, amount of RAM installed, speed of hard drive, etc.) will most likely overwhelm any noticeable difference cause by the slower bus speed.
If the price of the refurb was good, you should keep it. I have an online Apple Store refurb myself, and although I know that the latest iMacs are a bit faster, I don't see how that extra speed will be of great benefit to me. I'm much happier with the money I saved on the refurb compared to a new iMac.

New iMacs speed difference with ProTools

Hi, I am wondering if anyone has purchased a new iMac with 2.66 speed or greater and notices much of a difference in performance with audio mixing programs such as Protools or Logic. I am considering upgrading from my 24" 2.16 imac to a new one for the ram, speed and graphics. Any help would be appreciated.

HI,
Try posting in the Logic Pro forum. http://discussions.apple.com/forum.jspa?forumID=1201
You could try searching that forum also.
Carolyn

AppleScript speed difference between 10.4 & 10.5

This post is related to a question I posed in March 2009 (https://discussions.apple.com/message/9226100) regarding the speed difference between AppleScript text handling in OS X 10.5 compared with 10.4.11.
I have recently written a script to search through a text file which is an xml file exported from WorkGroup Manager. The file, which is approximately 1.8 MB, contains all the user names on the school server (just over 1720 of them), their settings and any other information we have added. After adapting some script ideas (using text delimiters and offsets) which I found on the internet to assist with counting the number of users and searching through the information of each one, one at a time, I have a script which works far in excess of my expectations in terms of speed when run under OS X 10.4, but runs slower than molasses in winter under 10.5.
The script counts the number of accounts, extracts each user's log-in name and also their actual name (which we have entered under a 'general info' or 'comments' field - I can't remember exactly where, but it is stored in the file), makes up a complete list of all account names (with the actual name, if present) and also makes up a subset of this information into a separate list which contains only the log-in names of those whose actual name has not yet been recorded on the server, then saves both lists to separate text files.
My original attempts, using some rather clumsy text searching and comparison techniques, took about 1-2 minutes to go through the whole procedure. After some internet searching, head-scratching and a bit more more work, the finished script, when run on my G5 under OS X 10.4.11, takes less than 3 seconds to do all I have described above, including the writing to text files. To say I was pleased would be an understatement!
Because the school/work environment, where the script would be run, is all OS X 10.5 or higher, I thought I should test it out under at least OS X 10.5. The script was developed on my DP 2.5GHz G5 with 8GB RAM running OS X 10.4.11. Using a fresh, clean installation of 10.5 I ran the script and was extremely disappointed. After letting it run for more than 20 minutes and still not finishing, I force quit AppleScript and reduced the number of accounts in the file. 40 accounts took 3 seconds, 60 accounts took 6 seconds, 80 took 11 seconds, 100 took 19 seconds and 120 took 27 seconds. I eventually let the script run right through - total time taken to process 1720 users was 65 minutes, compared to 3 seconds under 10.4.11!
Given that it was tested on the same Mac, with the same amount of RAM, using the same script and the same original text file, the only variable left (that I can think of) is the change of OS version - 10.4.11 vs 10.5.
As was pointed out to me in my previous post, AppleScript in OS X 10.5 handles all text as Unicode and has a greater overhead in processing time as a result. I have implemented the various bits of advice offered by respondents to my original post and changed the way I handled lists, etc. Obviously, if the script works so speedily under 10.4.11, I must have done something right in terms of code optimization/efficiency. It's when that exact same script is run under OS X 10.5 that it slows down incredibly. I even tried it on a 2.66GHz Intel Core 2 Duo iMac running 10.5.8 - it still took 40 minutes and Activity Monitor showed CPU usage by Script Editor constantly above 80% (often well above 90%). Saving the script as an application made no difference in the time taken.
Does anybody have any knowledge about what makes AppleScript Unicode-only text handling so slow? In this case, it is 1300 times slower! Is there any way of coercing/restricting the text handling/parsing to ASCII? If I really have to, I will set up a humble eMac at school with 10.4 on it just to handle large text files quickly with AppleScript, but I would prefer to be able to do it on the normal work Macs which have 10.5 or later on them. As mentioned, under 10.4.11 the script processes the 1.8MB text file with 1720 users and writes results to two files - all within 3 seconds, so I'm not really looking for coding suggestions unless they are directly related to what has changed in AppleScript under OS X 10.5. Without sounding too smug, the script works properly and speedily (at least in 10.4). I really would like to learn about the changes in AppleScript in OS X 10.5 and how to cope with or work around those changes.

Hi,
text 3 thru 14 in largeText
character 3 thru 14 in largeText
text 3 in largeText
character 3 in largeText
These lines will be slow on Leopard
Getting some text in a variable that contains more than 60000 characters will be slower on Leopard,
but I don't know why it's slower
Here a test script.
script o
    property t_text : ""
end script
set a to "abcdefghij"
set tResult to ""
repeat with i from 1 to 3
    set o's t_text to a
    repeat (item i of {17, 15, 14}) times
        set o's t_text to o's t_text & o's t_text -- add characters in the variable
    end repeat
    set StartTime to current date
    -- test
    repeat 20 times
        set b to text 3 thru 14 in o's t_text -- get a text in the variable
    end repeat
    -- end test
    set EndTime to current date
    set TimeTaken to EndTime - StartTime
    set tResult to tResult & " Getting text in the variable which contains " & length of o's t_text & ", (20 times) = " & TimeTaken & " seconds." & return
end repeat
tResult
Here the result on my old G5, 2 x 1.8 GHZ
Getting text in the variable which contains 1310720 characters, (20 times) = 50 seconds.
Getting text in the variable which contains   327680 characters, (20 times) = 12 seconds.
Getting text in the variable which contains   163840 characters, (20 times) =   6 seconds.
The result on the same machine on Tiger is always less of one second.
Also, I try with 20 millions characters on Tiger, the result : getting text in the variable which contains 20971520 characters, (20 times) = 0 seconds.
The solution ( text item in a list)
Here the script
script o
    property my_List : {}
end script
set OldDelims to text item delimiters
set RecordDelimiter to "::::::::::::::"
set LengthOfRecordDelimiter to length of RecordDelimiter
set o's my_List to findAll(read (choose file), RecordDelimiter)
on findAll(str, findString)
    set Oldtid to text item delimiters
    try
        set text item delimiters to findString
        if str does not contain findString then return {"Nothing found"}
        set t to str's text items
        set text item delimiters to Oldtid
        return t
    on error eMsg number eNum
        set text item delimiters to Oldtid
        error "Can't findAll: " & eMsg number eNum
    end try
end findAll
set NumberOfrecords to (count o's my_List)
display dialog "There are " & NumberOfrecords & " accounts."
set StartTime to current date
set text item delimiters to ":"
set FullUserList to {}
set ListOfUnnamedUsers to {}
-- first user needs to be done separately as it is not preceded by RecordDelimiter
set EndOfHeader to "Standard:URL"
set LengthOfEndOfHeader to length of EndOfHeader
set EndOfHeaderOffset to the offset of EndOfHeader in (item 1 of o's my_List)
set OffsetToApply to EndOfHeaderOffset
set TextBeingChecked to text (OffsetToApply + LengthOfEndOfHeader + 1) thru -1 of (item 1 of o's my_List)
tell TextBeingChecked to set {UserName, NameForInfo} to {text item 1, text item 7}
if NameForInfo = "" then set end of ListOfUnnamedUsers to UserName & return
set end of FullUserList to (UserName & tab & NameForInfo & return)
-- now do all the others
repeat with CounterG from 2 to (NumberOfrecords - 1)
    set TextBeingChecked to item CounterG of o's my_List
    tell TextBeingChecked to set {UserName, NameForInfo} to {text item 1, text item 7}
    if NameForInfo = "" then set end of ListOfUnnamedUsers to UserName & return
    set end of FullUserList to (UserName & tab & NameForInfo & return)
end repeat
set o's my_List to {}
set text item delimiters to OldDelims
-- write results to file
-- 1). full user list
set TargetFile1 to (path to desktop folder as string) & "FullUserList1.txt"
try
    open for access file TargetFile1 with write permission
on error
    close access file TargetFile1
    open for access file TargetFile1 with write permission
end try
set EndTime to current date
beep
set InfoToBeWrittenToFile to FullUserList as text
write InfoToBeWrittenToFile to file TargetFile1
close access file TargetFile1
-- 2). list of users without NameForInfo
set TargetFile2 to (path to desktop folder as string) & "UnnamedUsersList1.txt"
try
    open for access file TargetFile2 with write permission
on error
    close access file TargetFile2
    open for access file TargetFile2 with write permission
end try
set InfoToBeWrittenToFile to ListOfUnnamedUsers as text
write InfoToBeWrittenToFile to file TargetFile2
close access file TargetFile2
beep 3
set TimeTaken to EndTime - StartTime
set TimePerAccount to TimeTaken / NumberOfrecords
display dialog (NumberOfrecords & " accounts took " & TimeTaken & " seconds." & return & return & "That equals " & TimePerAccount & " seconds per account.") as string

Mixing ram sizes

Hello,
I recently purchased a macbook pro i7 late 2011 edition. It currently has 4GB of ram(2x2GB). I am wondering if it is possible to purchase a single 8GB(1x8GB) stick of ram and trade out one of the old 2GB sticks in order to have a total of 10GB of ram. I am aware 16GB ram kits are available but they are currently too expensive for me so atleast this way I could purchase one stick of 8GB for now and then purchase another down the road.
8GB of ram is not enough for me. So my question is if whether or not I can mix ram sticks. Please only respond if you know for a fact and why, I don't appreciate people making guesses.
Thank you!

No one can answer your question with certainty. Some people mix different RAM brands and sizes and even speeds, and don't have any trouble. Others try it and have nothing BUT trouble. No two Macs or Mac users are alike in all respects, so there's no knowing why it works for one and not for another. It's a safer bet to use exactly matched pairs, but you might be fine with whatever mismatched modules you choose. If you buy from a vendor who offers a lifetime warranty, you'll probably be able to return anything that doesn't work out for you. But you can't eliminate the chance of getting bad RAM no matter what you buy, and you can't be sure that even a good module will behave perfectly when paired with a module that you have now.
There are some vendors who offer RAM modules in pairs from one manufacturer but in unmatched sizes, and warrant them to work properly together. You may want to consider buying a 4GB and an 8GB module from such a vendor, adding a small amount in cost but giving you 12GB and a solid warranty. Here's one dependable source:
http://eshop.macsales.com/shop/memory/Apple_MacBook_MacBook_Pro/Upgrade/DDR3_133 3MHz_SDRAM
Note that the extra 4GB only costs $15 more than a single 8GB module.

Mixing ram whats best

hi im currently running 3 1gb sticks of ram but one of the sticks is older than the others and only runs at 533mhz the others usally run at 800mhz but because of the older stick all sticks run at 533mhz.
my question is.
is it better to run 3gb of ram at 533mhz or 2gb at 800mhz?
here are the sticks im mixing
http://www.ebuyer.com/product/98710 andhttp://www.ec.kingston.com/ecom/configurator_new/PartsInfo.asp?root=us&LinkBack=&ktcpartno=kvr533d2n4/1g
im running a p7n 750i sli platinum
cheers

Quote from: jimmi1 on 06-June-08, 18:27:11
hi im currently running 3 1gb sticks of ram but one of the sticks is older than the others and only runs at 533mhz the others usally run at 800mhz but because of the older stick all sticks run at 533mhz.
my question is.
is it better to run 3gb of ram at 533mhz or 2gb at 800mhz?
here are the sticks im mixing
http://www.ebuyer.com/product/98710 andhttp://www.ec.kingston.com/ecom/configurator_new/PartsInfo.asp?root=us&LinkBack=&ktcpartno=kvr533d2n4/1g
im running a p7n 750i sli platinum
cheers
I agree with everyone on mixing ram isn't the best idea in the world, but it's certainly not the worst either. Myself, I have mixed memory on several occasions with no problems at all. While you may lose a very small amount of spped from going from 800 down to 533, it is immesuarable without a benchmark to tell you. Also, losing dual channel is a very small decrease as well. I've tested it on many of my systems and the biggest loss was only 5%.
If you need all 3GB of RAM then I suggest, after you have thoroughly tested your new ram and make sure they are 100% stable, is that pop in your extra ram and run some stability programs such as memtest86+ for overnight or longer (8hrs minimum). If you get no errors then you should be good to go.
also, to compare speed loss I'd run some benchmarks before adding the extra memory such as 3dmark/pcmark and compare them afterwards and see if it is worth the loss to you. I'm sure you won't even notice it at all without running the benchmarks telling you they are running slow.
Good luck
-=Mark=-
ps. also if you start having issues down the road then remember to remove the old RAM and retest just to be sure they aren't the culprit.

Mixing Ram with different CAS latencies in K7n2 Delta-L?

I have been using 512mb Kingston Value Ram in my computer, pc3200, with CAS latency of 3.0. I just purchased some Corsair value select 512mb ram pc3200 with CAS latency of 2.5. I know you are not supposed to mix ram with different speeds (like 400 vs. 333) but does it matter if the CAS latencies are different?
I'm running an AMD XP 1800+, K7n2 delta-L, nforce2 motherboard from MSI. Someone at a computer shop told me they tried mixing Kingston 3.0 CAS with Corsair 2.5 CAS, and said his computer wouldn't even post. So I'm wondering if this is an isolated problem, or you will always run into this problem if you mix ram with different CAS latencies.
If anyone has experience with this issue, please share with the board. Thanks!
Chris

The age old question, will the components I bought be compatible ? There are those that have bought identical matching memory that didn't work. In my case, I had an ECS K7S5A that used PC2100 Crucial memory, the sticks neither matched (at one time they did, but one stick died and they sent me the closest thing they had.). Neither of these Crucial sticks was identified by a configurator as being compatible with the K7N2 Delta L that I decided to buy. In the end, not only did both sticks work, but I put them in as single channel mode (ram slots 1 & 2), but later changed the configuration to dual channel mode (ram slots 1 & 3, even 2 & 3). It worked flawlessly in all three configurations. Sorry for the long answer, but in essence, there are no guarantees and your worries will drive you crazy. When memory is mixed, you reduce the likelihood of compatibility, even when you go beyond the recommended products that were specifically identified.
That guy at the computer shop, did he ever indicate or isolate the true reason why the memory wouldn't work ? Maybe, maybe not. I would think with a disparity in memory, the bios is the key to setting the settings for the worst stick of the bunch. Then again, the products you get might overclock to what the better sticks run at. My assumption is that mixed sticks, the bios retards settings to this in "auto" mode. When you force it manually, it may work or it may fail. One thing you oughta know, each and every stick has the manufacturers id encoded onto them at the very least, just like the firmware on other items indicates a manufacturer code and other data that allows these things to be compatible. So know you face that battle going in with any of them. If the bios programming doesn't allow it to work, from that perspective, there'll be problems.

Mixing ram brand ok?

http://shop1.outpost.com/product/4292564
Id like to get some of that ram but right now I have Corsair Value Select 512. The board seemed real picky as to where I put the ram and it only liked it in the 3rd slot so I figure maybe its real picky about the ram in general. I dont overclock but is mixing ram like that ok? Or should I just get another stick or value select.

Yes it does work i've just done it over the weekend. Mty son's just upgraded his PC so I pinched his old memory 2x256mb 3500 Geil.Golden Dragon 433.
Put my ballistix in slot 1 & the 2 single sided eil in 2 & 3.
at stock ballistix run 2,2,2,6 geil 2,3,3,6 so tried it at stock 1st at the lowest speed module 2,3,3,6. I upped the memory voltage a notch & jobs done. Can't get back yet to the 225 I had (dropping Cas to 2.5) but have got to 220.
Think In your case it depends what you value most 1GB or 512MB good performance memory MUSHKIN 512 MB 3200C2. Forgive the pun but its a bit like harnessing a racehorse & carthorse together. You will have to manually set your timings to slowest module Value & so won't see the benefit of the MUSHKIN. Alternatively put in the MUSHKIN & enjoy the faster timigs you can now get.
luck

DC Mixing RAMs on E7205. Will it work?

I have 2X512mb DDR266 kingston value ram. 2.5-3-3-7.
Could I use Kingston 1.0GB ( 512 x 2 ) PC3200 DDR-400 TWINS Hyper X/ CL I don't know.
Will Dual channel work with the 2 pairs of different RAM speed? Or the PC would not boot at all?

It's always not recommended to mix the RAMs though you may want to try.

Speed difference between i7 quad 3rd gen 2.6ghz and i7 quad 4th gen 3.1ghz?

How much speed difference in Logic X will I notice between an i7 quad 3rd gen 2.6ghz and i7 quad 4th gen 3.1ghz?
both loaded with 16gb 1600 ram... 256gb ssd

Kappy wrote:
All other things being equal 4-cores are twice as fast as 2-cores. This is regardless of what you are doing. The only way a 2-core processor would be as fast is if it were run at twice the clock speed. But the 2-core CPU is only clocked around 10% or so faster. Now, for all that you claim you will be doing the relevant question is do you need 4-cores. My answer is that you don't. But the 2-core machine will be slower - all things being equal.
Iris is a far better GPU than HD4 or 5000. But not as fast as a discreet GPU with better performance measures. Again, you don't really need high-power GPU. Iris should meet your needs adequately for now.
But remember you want to keep the computer for 6 or 7 years. No one knows what your needs will be then. You may find whatever you buy today that meets today's needs will be inadequate for tomorrow's.
Your comments on graphics pretty much confirm the majority of what I've been reading on other sites.
The conflict is with cores. About half the people are saying for low CPU intensive tasks 4 cores are totally unnecessary, while the other half says they'll make things faster no what the task (one thing all seem to have in common is they're totally against the 2014s).
So it seems I'm left with the decision between faster performance vs better graphics.
I appreciate your input.

Bonjour vs. DNS mapping to afp server -- huge speed differences

This is my original topic:
http://discussions.apple.com/thread.jspa?threadID=1340637
Initially, I thought the issue was Leopard's Finder sidebar was mapping via smb -- hence the very poor speeds. After several replies with RCR, I'm seeing that both machines were copying via afp, the only difference is the Leopard sidebar mapped the machine via Bounjour vs. DNS.
Here's my setup:
- Leopard iMac (August 2007), 4GB ram, gig-e connection
- Tiger Server Mini (August 2007), 2GB ram, gig-e connection
Using Leopard, mounting the sidebar via Finder will copy a file (located via Bounjour, over afp, confirmed with via Sharepoint and "mount" on cli) roughly 32MB/sec. Disconnect the Bounjour mapping and reconnect to the same machine (command-k) via DNS (full.three.partnaming) and the same transfer will be nearly 78MB/sec.
Has anyone else seen this speed difference? Can anyone else test this speed difference on Leopard?

As requested:
Last login: Thu Jan 24 16:16:51 on console
imac:~ vash$ dns-sd -G v4v6 imini.local
Timestamp A/R Flags if Hostname Address TTL
16:18:39.609 Add 3 4 imini.local. 192.168.1.40 120
16:18:39.609 Add 2 4 imini.local. FE80:0000:0000:0000:0216:CBFF:FEAB:6B84 120
Here is similar for the other full part naming:
imac:~ vash$ dns-sd -G v4v6 imini.fenjikufenji.com
Timestamp A/R Flags if Hostname Address TTL
16:19:56.768 Add 2 0 imini.fenjikufenji.com. 192.168.1.40 108002
16:19:56.777 Add 2 0 imini.fenjikufenji.com. 0000:0000:0000:0000:0000:0000:0000:0000 0 No Such Record

Mixing RAM--Speed differences

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