Performance in RAM pairs?

I have a stock 1.83 macbook. If I was to upgrade to 1GB ram, using paired ram sticks, would the difference be much different than sticking 1gb atick in and having 1.25GB, when it is not in pairs?

http://eshop.macsales.com/Reviews/MacBook/Testing/Memory_Benchmarks
Obviously, it's in this shop's best interests to convince you to purchase as much memory as possible, but the benchmarks they show on their site show that whether you match or not, you'll see a big difference over the standard 512MB. In your position, I would purchase the 1GB single-stick upgrade. Then you'd have the option later of putting in another and having the full 2GB.

Similar Messages

Issues with performance and RAM previews

Just did a major system upgrade from an iMac to a Mac Pro, and now I'm having an issue with performance...specifically with RAM previews.
When I try to do a RAM preview with audio, it grinds my entire OS to a hault (can't switch apps, or click on much of anything). It eventually clears up enough for me to stop the RAM preview.
So, I'm wondering if maybe my Memory & Multiprocessing settings might be off.
Here are my system specs:
Mac Pro
2 x 2.4GHz 6-Core Intel Xeon (12 cores)
64GB RAM
ATI Radeon HD 5870
AE CS6 (11.0.2.11)
AE is installed on an SSD drive and the scratch disk is an internal HDD.
Here are my AE Memory Settings:
Here's my GPU Info:
Let me know if any other info is needed...

You are reserving far too little RAM for other software.
See this: "Performance tip: Don't starve your software of RAM."
(Also, I recommend going through all of these materials: http://forums.adobe.com/thread/543440 )
Regarding the SSD: Putting your application files on it means that applications load/boot faster. This is fine, but that benefit is just when you first start the application. If you put your cache files on it, then you get the benefit every time that something is read from or written to the cache---i.e., many times per second, for the entire time that you're working. Put your cache files on your SSD. BTW, there's no reason to not put your application files and caches on the same SSD. The reason that you split things across multiple disks is to prevent simultaneous reads and writes to and from a slow disk; the program loading from disk happens at a different time than reading and writing cache files, so there is no potential for conflict and slowdown.

RAM pairs - a real benefit?

Hi,
I have 2.4ghz early 08 MBP with the original 2gb of ram. I need to upgrade the ram as the software I use is very memory intensive. I have been given a crucial sodim which is now running in the MBP but I am really wanting th max it out. How I thought of just buying another 2gb from crucial to give me 4gb altogher BUT I have just realised that one is advised to buy in pairs to that they preform better using duel channel. My question is just how much better will identical pairs preform compaired to if I just bought another single 2gb and popped it in next to my current crucial one?
Iv seached the forum here but I can't find anything that says exactly what the preformance difference wil be.
If identical pairs 2gb x 2 is 10 out of 10 what a new single 2gb and my current 2gb one give me out of 10?
Thanks
phil

If identical pairs 2gb x 2 is 10 out of 10 what a new single 2gb and my current 2gb one give me out of 10?
Check System Profiler's Memory report first. It will show how your two RAM slots are currently populated.
My Late 2007 MBP came with two 1G modules and I suspect yours may have that same arrangement. If both slots are already used, ordering two 2GB modules is the only solution to maintain the matching sizes.

Poor performance despite RAM upgrade

Hi
I just upgraded my MAC MINI 2GB RAM to a total of 6GB RAM.
The MAC Mini definitely shows as having 6GB of RAM now but still it seems to struggle.
I have only one song (with about 10 tracks) in Garageband, there's no stuff on my desktop etc so the performance should be better but even now it seems to struggle and GB often freezes. I don't really see what the problem could be as like I said I have only one song in there that I am working on and surely my MAC should be able to handle a lot more than that without crashing and freezing.
Any ideas please?

Yes, I have tried it. This is not very practical however and the reason i got more RAM is so that I do not always have to lock tracks. It is impractical to lock tracks, especially while mixing. Every time I have to lock a track it takes at least 30 secs to lock it, that's why I stopped locking them.
I would have thought that 4GB more RAM would allow me the 'luxury' of not having to lock. However, locking does help performance but is a major pain.
And again, the whole reason i spent money on a RAM upgrade was so that I wouldn't always have to lock, so locking the tracks now would defeat the object.

Ram (pairs)?

i bought and installed 2 GB of patriot ram from newegg.com
i did not get a 2gb pair (in the same package)
i got two separate 1 GB sticks....
is this a problem?

Nope. I did the same thing and it works fine.
Did you get THESE? If so, they are the same sticks I have and they have worked perfectly well since I installed them back in early July.

Unmatched RAM pairs

Long story short I had to get a national computer store to replace two 1gig RAM sticks I had bought. They only had one in the store and got the other thru their web site. They are 1 gig Centon PC 3200's. I plugged them in and find they have different CAS #'s. One stick of this and my two original sticks are all PC3200U-303300. The other Centon stick is PC3200U-25440. I believe three have a 3.0 ns speed and the other a 2.5 ns speed. Will this cause me any problems? I got one opinion from the manufacturer, but after the nightmare I just went thru, I need a second opinion. (everything seems to be working fine)
Rick

Hi,
All the manuals ONLY say to install RAM of equal size - not CAS speed.
http://www.info.apple.com/usen/cip/pdf/g5/memory_c.pdf

After Effects CS5.5 - Very Serious Performance Issues w/RAM Preview

My system: Windows 7 Professional, two Intel Xeon X5650's, 12GB RAM, and a NVIDIA Quadro FX 4800.
Problem: RAM Preview in CS5.5 gives me less than 2 fps (yes---two frames per second). This is even with the most simple of compositions. I created a 1080p 23.976 project with two simple solid layers and keyframed position and scale values for one of them with no other effects on either solid. RAM Preview gives me 1.8 fps.
I still have AE CS5 installed and it gives me solid, predictable results with RAM Preview. When I create a similar test project inside CS5, it creates the RAM preview almost instantly and displays in proper realtime (23.976 fps).
My settings for both CS5 and CS5.5 are similar (and I have tried many variations in my attempt to fix this problem).
PREVIEWS
Fast Previews: Adaptive Resolution Limit 1/4
Enabled OpenGL and both sub-options for OpenGL enabled.
MEMORY & MULTIPROCESSING
RAM reserved for other apps: 4GB
I have tried various settings for Multiprocessing, all of which results in the same less-than-2 fps RAM Previews. Currently I have MP'ing enabled with 1.5GB allocation per background CPU and the actual CPU's used is 4. Again, no matter what I set it to, I get the same performance issue.
On my screen magnification ratio setting, I am using 25% and my Resolution/Down Sample is set to quarter. On my preview tab, I have tried setting my resolution from the default of "Auto" to "Quarter" with no difference.
In summary: On the same machine, AE CS5.5 RAM Preview offers terrible performance; CS5 RAM Preview offers great performance.

Under AJA Preview there are check boxes, one for "Video" and the other for "Preview." I've checked and unchecked them both and I'm still getting poor RAM previews. No matter what I have toggled, I seem to get between 1 and 2 fps for my RAM Previews.
I am not currently using the AJA card for anything. I will consider uninstalling it if this might possibly solve my problem. It's just a hassle to install and uninstall cards on a per need basis.
If there are any other thoughts, I'd love to hear them. At this point, I'd do just about anything to have realtime previews back.
The machine I'm using, by the way, is an HP z800 with Windows 7 Professional, two Intel Xeon X5650's, 12GB RAM, and a NVIDIA Quadro FX 4800. It has the following installed: CS5.5 Production Premium, AVID Media Composer 5.5.2, and AVID DS 10.5.1 (among other programs).

Ram and Final Cut Pro Questions...

Ok, so I have a 2.66 Mac Pro with 2GB of RAM. I am now starting to work with HD content, so I just got 2 more GB of RAM from OWC. But I've been reading that I should probably have more than 4GB of RAM to work with HD content. I have the ATI card on the Mac Pro btw.
I just want peoples' opinion on this. Is 4GB enough? If not, I get confused about the Ram's performance on the Mac Pro. Don't I have to get to 8GB of Ram in order to get the RAM to act quickly? I'm not sure how all that works, but I just remember reading on here ram should be doubled for its bandwidth to reach max potential. Does that mean 6GB of RAM will be fine? Or does it have to be 2, 4, 8, 16 GB of RAM for it to be the fastest it can be? Does it slow it down if I use 6GB of RAM?
I can probably afford 2 more GB of RAM, but I don't want to put 6 in my system if it actually slows it down. Thanks for your help!

Well, the system came with 4 X 512MB of Ram, so I'm
getting 2 x 1GB of Ram in the mail. That'll give me
6 DIMMS. I could've sworn that I had to match DIMMS
top to bottom for it to work. But you're saying to
put 4 DIMMS to fill up the top tray and then just
place the remaining 2 DIMMS on the bottom tray? Am I
understanding that correctly?
Yes. Each riser board has two pairs of slots, numbered 0 through 3. You MUST match 0 and 1 with the same type and size of RAM if you fill those slots on a board, and you MUST match 2 and 3. Otherwise, you can put whatever pairs you want on whatever boards.
Performance-wise, though, you get the best results by:
1) Filling both RAM boards' 0 and 1 slots with the same size and type of RAM. Same with 2 and 3 on both boards.
2) Placing dual rank (usually 1GB or higher capacity) RAM in 0 and 1 on both boards, as those are the slots that are usually hit first, and dual rank RAM is faster.
If you can afford it, you might consider getting an additional 2x1GB pair of the same brand you already have. Then, you could put those 4 modules in the 0 and 1 slots on each board and the 512 modules in 2 and 3. This will put your faster dual-rank RAM in the lower numbered slots, and will make sure that module sizes are matched across boards, which will maximize performance.
Also, I tend to have a lot of software open when I
edit. Soundtrack, Motion, Livetype, FCP, soon CS3
and other random software is usually open when I edit
(like iChat and Mail). Will 4GB still be enough you
think? I didn't mention all that in my first post,
so I apologize.
If you're running all of that, you might well find that extra RAM is helpful, particularly if you're processing in the background. Even if not, switching between applications will be smoother and faster with more RAM. This is another good reason to think about getting another 2x1GB pair.
Also, this whole Ram bandwidth thing has me confused.
If I do end up getting 6GB of Ram (4 x 1GB and 4 X
512MB)does that slow down my Ram? Does the fact
that I have 2 different types of DIMMS slow down my
Ram? It's all so confusing
A tiny little bit that you may not notice, and no.
Right now you have 4x512MB in your 0 and 1 slots. This is pretty optimal for a setup of 512 MB modules, because having the same type of RAM paired across boards in the same numbered slots increases your memory performance.
If you add 2x1GB in the 2 and 3 slots on one board, your existing memory (the original 4x512MB modules) will still be able to transfer data at just as high a rate as before. The 2x1GB modules in 2 and 3 will be slower because they're not paired with another 2x1GB pair on the other board, but that will only affect accesses to the data stored in those modules, which the system will tend to use last.
What will slow down somewhat is that each request the CPU makes to transfer data from your existing 4x512MB RAM will take a bit longer to start because you have put modules in the 2 and 3 slots on one of the boards. Once it gets going, the transfer will happen at just as high a rate, but the setup time is longer by a small amount.
Chances are, the performance improvement you'll see with the extra RAM running all those apps will totally overwhelm any such slowdown. Note that I don't know of anyone who's benchmarked a real impact of that, all the discussions I've seen about such a slowdown are just theory.
However: those 1 GB modules in 2 and 3 will operate at a slower rate than they could because you don't have another 1 GB pair on the other board matched up with them. That's why I suggested getting a 2nd pair of 1 GB modules for the other board.
Finally, if you do get 4x1GB, swapping those 1 GB modules into the 0 and 1 slots will ensure that they get used first, and since most 1GB modules are substantially faster than the 512 MB modules, you'll want that for best performance. However, unless you get a couple of additional 1 GB modules to fill out the set of four, I would not recommend swapping the 512 MB modules into different slots. The fact that you have a matched set of 4x512 in slots 0 and 1 is a big speed benefit if you don't get a matched 4x1GB set for your expansion.
I hope that I haven't confused the situation...
-- Mark
4-core 3 GHz Mac Pro w/ 4.5 TB HDD and 10 GB RAM, 17 Macbook Pro 2.16 GHz

No real time RAM preview with Pr CS6.0.1 Open, Real time RAM preview with Pr Closed

When Premiere is closed I see real time performance on RAM previews (29.97fps), smooth UI interaction with and without Fast Draft enabled. When Premiere is opened I get poor fps in RAM previews, lagging UI interaction unless Fast Draft is enabled. Premiere Memory preferences are set to 6GB reserved for other apps, and Optimized rendering is for Memory. It seams that as soon as Pr takes on any processing AE's performance just dies until Pr is closed.
I've tried clearing caches in AE and in Premiere, restarts, and repair disk permissions,
Included is a realtime screen capture of what i'm experiencing, I open and close premiere twice to illustrate that it's not an isolated occurrence.
any ideas?
System Specs:
dual 2.26ghz quadcore MacPro4.1
OSX 10.7.4
32gigs RAM,
4000 for Mac.
CUDA 4.2.10, GPU driver 1.3.4.0.
Cache drive is a 2TB RAID 0 with 250MB/sec
Media is on RAID 6 with 600+MB/sec.
Premiere Pro CS6.0.1
After Effects CS6.0.1

I tried the same thing on my MacBook Pro and there was no issue. Here's my specs:
Processor 2.4 GHz Intel Core i7
Memory 8 GB 1333 MHz DDR3
Graphics AMD Radeon HD 6770M 1024 MB
Software Mac OS X Lion 10.7.4 (11E53)
I'd suggest:
Submit bugs to http://www.adobe.com/go/wish . More on how to give feedback: http://bit.ly/93d6NF

More ram for Macbook pro gaming

I was wondering i have a 6750m 512mb and 4gb of ram, if i upgrade to 8gb will it help improve anything? will it help boost frames it stuff like call of duty ghost? or anything else i have i7 , macbook pro late 2011

Sorry, if I was paying attention I would have known that. I am always of the belief that if you do any type of gaming, especialy console ports, at least 8GB of RAM is a good number and a graphics card with 1GB of dedicated ram. Gaming asside, I consider 8GB to be a minimum these days. Apple still pushes 4GB as a jumping off point and for most people doing day to day tasks on a Mac (web browsing, word processing, etc) 4GB of ram paired with an i5 processor is sufficient. Most i7 processors are good enough for gaming, although quad core will make some difference. So to answer your question, I would think you will see some frame rate improvements by doubling your ram but the graphics card may still hinder you a bit.

Wierd performance in tomcat/java: help consult

hello
after to test my project in tomcat 5.5.23 and jdk 5 update 12
in network(intranet-only until now with 2 clients) i see that this is fast, after of a some time i can see a wonderful exception
related with java heap exception thrown by the tomcat
after to search in google, i found the solution for windows
(server works with windows XP SP2) related to give some values
for memory ram values to the tomcat5w.exe
http://computerlabsolutions.com/supp...hp#performance
i only did the second step
according to this
>
Click on the Java tab, and enter 128 in the Initial Memory Pool, and 350 or 400 in the Maximum Memory Pool.Leave the other field blank.
so my values are
128 in the Initial Memory Pool
400mb Maximum Memory Pool
the point is that the server is a intel dual core with 3ghz for each , and has DDR2 512 MB of ram
ok, its works, the point is that after to restart the server, the system is fast again,
but then again after of some time the performance go to very slow
if i do ctrl+ alt+ del to see the performance of the pc related with the ram
i taked a picture when start the wierd performance
my ram go to 645MB and swap 46200KB
i thought if i stop to use the system/application(5 minutes),
i can give the chance to the java or tomcat to get and free
some resources
well not the ram go to 640MB and swap to 45276KB
of course if i shutdown my tomcat
i have now these values
RAM 319MB and swap 44564KB
is normal this?,
i dont think so
some important suggestion/advice by our members??
BTW: i am using pool connections related with the db area
thanks so much for advanced

I suspect you are paging. You've allowed the Java object heap to grow to 400MB, but you need physical memory for other things (the executable, thread stacks, the operating system, etc.) I think what you are seeing is that performance is good until you start to page the Java virtual machine, at which point performance probably hits a wall. And having things slow down can cause queues to back up, retransmissions to happen, etc, increasing your memory load and making things worse.
Either buy more memory, or try tuning that 400MB down to a level that your machine can sustain. If you have GC logs, you can tell how much live data you have, which could help you choose an appropriate value for the maximum memory pool.

After Effects Error: RAM preview needs 2 or more frames to playback

I keep getting this error message on a Windows 7 64bit system with 12GB of RAM. I have tried rebooting and re-installing the application and After Effects still gives me this error message when I press '0' to perform a RAM preview
Any suggestions would be appreciated.
Thanks

Canon PowerShot SX20IS
I would suspect that is the problem.... From what I gather, it uses H.264 compression inside MOVs, but it may use an unusual, non-standard profile and thus throw off AE. Can you check these settings in the extended info in the Quicktime Player? would help to know some more details. If you have Quicktime Pro, it may be enough to re-export the clip from there. Using identical settings, this should go pretty fast and not cause any changes in quality, but doing so may fix little annoyances commonlyy associated with such formats like open gaps or invalid timecode markers. If that doesn't help, then I guess it's time to run it through SUPER©, ffmpeg etc. to get workable converted files...
Mylenium

Dreaded three beeps of RAM death related to OSX 10.8.3 update?

I installed the 10.8.3 update soon after it became available using the OSX software updater. About a week later, when attempting to wake my iMac from sleep, it gave me a black screen and the three repeating beeps for the first time ever. It restarted upon a hard restart, and I then did a bit of research online to find out the 3 beeps meant a possible RAM issue. As I had added 8 GB of Kingston Mac RAM (2x4GB of this) to my iMac about a year ago, I then ran Apple hardware test (looped and extended) overnight, but it came up with no problems. I then ran Rember over several loops too, but that came up with nothing as well.
So I opened up my iMac and switched around the memory, mindful of the pairing. I did a reformat and reinstall of everything as well, updating again to 10.8.3 using OSX software update. But yesterday, about 2 days after the reformat, I again got the three beeps when waking from sleep.
Could these three repeating beeps be related to 10.8.3? Up until 10.8.2 I didn't have any such issues. Any ideas?
I have just done another reformat, but installed 10.8.3 using the combo updater rather than using OSX software update. Will keep you updated if this solves the issue. If not, I will reformat and go back to 10.8.2. Hopefully that works!

UPDATE (and tentative resolution to my issue): So the 10.8.3 combo updater I installed still gave the 3 beeps issue, as did the revert to 10.8.2. After all that, I figured it wasn't the OS or software, so I played around with the RAM - I tried out the pairs of RAM in turn, and well, after some relatively extensive testing, I didn't get any beeps when the pairs were installed on their own. So it turns out that the RAM pairs are actually fine, but the 4 GB of factory installed RAM wasn't playing nice with the 8 GB of Kingston RAM. Strange, coz for a year they worked fine together (which is why I didn't initially suspect a RAM compatibility issue). Anyway, so now I just kept the 8 GB of Kingston Mac RAM installed in my iMac, and removed the factory installed RAM, and so far so good.

CS6 RAM preview short and "needs 2 or more frames" errors

Hello everyone,
I've been researching this one for over a week now and still haven't found a solution. The short story it is that my RAM preview is limited to only a few seconds regardless of work area, but I've got over 4Gb of RAM available and open for use. CPU is barely being used as well. I'm also intermittently getting the "After Effects Error: RAM Preview requires 2 or more frames to playback," which confuses me as I have 4Gb or ram available. RAM is still close to 4Gb during and after preview. This has been a repeated problem, not matter how many times the memory is purged, the RAM is free'd up with the Memory Clear App (as recommended in previous threads), or the computer is restarted. Memory and Cache have been optimized for best performance as well. Also, final renders are fine and have no problems. It's only with RAM preview and previewing the project that I'm having trouble. It seems to me that the project is being bottlenecked somewhere but not sure where or how. To open, here's the system I'm running it on. It may not be a brute but it should be enough to handle the work.
System:
Program: Adobe After Effects CS6 (11.0.4.2
System: Mid 2010 iMAC, 27-inch
Processor: 2.8 GHz Intel Core i5
RAM:   8GB 1333 MHz DDR3 (two 4gb cards)
Graphics: ATI Radion HD 5750 1024 MB
Software: OS X 10.9.4
Hard Drive: Western Digital WD Green 2TB Sata drive
                    -6.0 Gb/s 3.5" Hard Drive
Project Specifics: (Has happened across other similar projects)
Project: Educational video with graphics, simple animations, and link to Premiere Pro timeline.
               -33 layers (most are highlight boxes and animated arrows)
                         -13 small PNG images (Arrows and simple graphics with 1 3D layer)
                         -7 Short Compositions
                         -7 Text Layers
                         -5 shape layers
                         -1 Premiere Pro Timeline
Composition Settings: 1280 x 720 at 23.976fps
Project Location: Company Server
Problems
-Ram preview only renders a few seconds, regardless of Work Area or "From Current Time" enabled.
-Fairly frequent, "After Effects Error: RAM preview requires two or more frames to playback."
-Scrolling through project is very pixelated.
When Problems Occurs: When trying to perform a RAM preview.
Attempted Solutions:
- Use of Memory Clean App to open up more RAM. (Makes little to no difference when problem is at peak.)
- Shut down and restart computer (Does work for a short time but problem reappears within an hour)
- Closing all apps and running just After Effects. (Little to no difference)
- Turning off motion blur, turning on 3D draft and using Proxies to simplify project. (Little to no difference)
- Purge: All Memory. (No difference)
- Stopping any unnecessary processes in Activity Monitor. (No difference)
Additional Information:
-Projects seem to take a little longer than normal to open. (1-2 min max.)
Thanks in advance for any support on this issue. It's been quite a stressful timesink.

Unfortunately the problem has come back again after an hour of use this morning. To show how much RAM I have available at the time the issue appears, I've included the Memory Clean window showing 4.44GB of ram available at the time of incident. It first happened a few minutes ago with roughly 1GB available, so I and purged all memory in After Effects and cleaned the RAM with the Memory Clear app, but still no such luck. I've been working with the same actions and material all morning so nothing new was introduced to the project when the error occurred. The work I was performing at the time was animating highlight boxes over a screen capture, but again it seems to happen regardless of what I'm working on. I'm going to restart the computer and see how long it makes it before needing another reset. Any other ideas as to what it could be? Also, if there's any more information that might be helpful to solving the issue please let me know and I'll be happy to share. Thank you again for the support!
Szalam, thank you for the link. I had been to the page previously but am going back to watch them again to see if I missed something. If it is a bottleneck, I'm not sure where it could be as of yet.
And just to make sure I'm not making any other simple mistakes VVV

Error in CS4 RAM detection?

Hello,
I'm comparing the memory settings of my new installation of CS4 with my old CS2, and note the following discrepancy (under Edit -> Preferences -> Memory/Performance):
Available RAM
CS4 2569 MB
CS2 2698 MB
CS4 is thus missing 129 MB of available RAM.
As I understand it, these values are indicators of available addressable memory space only, and have nothing to do with the RAM actually free or in use by Photoshop at that time. In that case, they should be the same for both CS4 and CS2, but they are not.
Why?
For those of you with both CS4 and any prior version of Photoshop still installed, do you see similar discrepancies?
Thanks.

Mylenium,
Thanks for the info. I also got an answer from Support in similar vein to yours:
"When you start Photoshop it subtracts the amount of RAM your system needs to run its basic functions plus the amount of RAM it takes to safely run Photoshop, including whatever plug-ins you have currently installed it is that amount that it reads at the launch of the program that will always display in the preferences. You can verify this, if you wish, by moving the Plug-ins folder out of the Program Files folder location for Photoshop and then restarting Photoshop you will see a slight increase in the amount of available RAM displayed."
The source of my misunderstanding was the KB article here http://kb.adobe.com/selfservice/viewContent.do?externalId=kb404439. It states the memory needed for the OS is already subtracted from the displayed Available RAM, however it didn't state that the amount needed for the PS program had also been subtracted. Since the menu is to tune what is available for Photoshop, I took that to mean program+data, but apparently it's for data only. FWIW, I suggested they clarify the KB article on that point.
Bart Cross,
Thanks for your contribution :\

Performance in RAM pairs?

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