Mixing RAM... DDR3L and DDR3.

Hey,
I have two MSI.. One is GT70 and one is GT72 (dominator pro).
The GT70 has 24gb DDR3 ram, and my new GT72 only have 8gb DDR3L ram.
My question is. Can I take some DDR3 ram and put into the GT72 that runs DDR3L ram? Can I mix them both at the same time that is?
Can I put 8 DDR3L + 16 DDR3 ram in the GT72, or will this malfunction somehow? It would suck to have to just throw away 16GB ram that I bought to my GT70 about 3 weeks ago.... Damn it....

i think thats what Zipper meant if you put a 1.5V module in your GT72 that as got DDR3L module in it by default, it will make the 1.5V moddule fry out since it isnt compatible.
DDR3L = 1.35V
DDR3 = 1.5V
So putting 1.5V module in your GT72 that has 1.35V ram module in it will kill the V1.5 since GTX 72 runs with DDR3L not DDR3.
Update: Nvm Zipper meant other way around but i think it would happen same if you put other way around that 1.5 module will die since not enough voltage.

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Mixing RAM sizes and issues

I'm having an issue with my late 2012 iMac 27 inch. It came with 8GB stock RAM installed on the 1st and 3rd slots (lookin from bottom to top). The 2nd and 4th were empty. I bought a Crucial 16GB RAM (http://www.amazon.com/Crucial-PC3-12800-204-Pin-Modules-CT2C8G3S160BM/dp/B008LTB JFW/ref=sr_1_1?ie=UTF8&qid=1365482251&sr=8-1). I installed the new ones in 2nd and 4th slots. Much to my surprise, when I switched on the machine and checked "About my Mac", it only showed 16B 1600Mhz RAM instead of 24GB RAM and after a few seconds, the system hung. I restarted the machine and I heard several beep sounds and the system never turned on. I checked th slots and all were seated OK. On switching again, I heard the same beeps. I switched off the machine completely, waited for a few seconds and tried again and then all was normal. The system was showing 24GB RAM and I was able to use my system for couple of hours and all was OK.
I have couple of questions:
1. What's going on here?. Is it a bad RAM that I need to worry about?. I still have ample time to order a new set of RAM and return the ones I have now.
2. Why the system acted up and now it is OK even though I didn't change anything?
3. Is the seating correct?. What is the best order to get maximum performance?. I intend to remove a 4GB RAM and keep it at 20GB RAM. If that's the case, what should be the order of arrangement?
4. Is there any cause of concern that my system is acting up?. I'm well within my 14 day return period and I can go for a exchange if you guys feel that way.
Please advise.
Thanks.

Sounds like maybe the modules are not firmly seated in the slots.
Try re-seating them, only this time push real hard on each module with both thumbs to ensure that than are firmly seated in the slots.
see > iMac: How to remove or install memory
Then if the new RAM is not working, return it and buy directly from > Crucial.com or > OWC macsales.com

Hi I'm thinking of buying Adobe After Effects CC for my MacBook Pro. But I am worried it won't work. Here are my specs 2.4 GHz Intel Core i5, 4 GB Ram, 1333 MHz DDR3,13-inch (1280 x 800) are my displays and I'm up to date with latest software.

Hi I'm thinking of buying Adobe After Effects CC for my MacBook Pro. But I am worried it won't work. Here are my specs 2.4 GHz Intel Core i5, 4 GB Ram, 1333 MHz DDR3,13-inch (1280 x 800) are my displays and I'm up to date with latest software. I need to know if this will work on this Mac and or if there is any other After Effects that will work.

The display would not. However, your model does not have a discrete GPU, and the integrated (Intel 3000) would not meet CS6's requirements (any CS6 software) alone.
However:
Standard VRAM:
384 MB
Maximum VRAM:
512 MB*
Details:
Apple reports that "memory available to Mac OS X may vary depending on graphics needs. Minimum graphics memory usage is 384 MB". *If upgraded to 8 GB of RAM (or more), 512 MB will be reserved for video function.
In other words, you would need to upgrade your RAM to 8 GB. The VRAM (video ram) of the processor can exceed its specifications if you upgrade your memory to 8 GB. In order to run the software, you would have to upgrade your RAM first:
Crucial Memory Upgrades for Macs - Apple Memory
Complete MacBook Pro "Core i5" 2.4 13" Late 2011 Specs

Mixing RAM Modules

Several weeks ago, I replaced my 256 MB RAMs with 2 1 GB modules in a late 2005 G5. They seemed to work fine, though my GPU seemed to be running a bit hotter. I just installed an additional 2 GB bought from OWC, and also added back the 2 original 256 MBs to bring my total to 4.5.
Looking in System Profiler, I see that my original 256s and the latest 1 GB modules are PC2-4200U-444, as specified in the online compatibility guide. I see the I GB modules from my first upgrade are PC2-3200U-288.
I bought them at a local shop- for way too much money, by the way - and was told that the number printed on them was wrong and they were compatible with my model. Is that right, or this a problem?
Thanks

Hi! The PC2-4200 modules are the correct ones and you shouldn't run anything slower. You can run faster ones but you shouldn't run slower ones or mix speeds. And if the computer sees them as the slower ones then most likely they are! Tom
Message was edited by: Thomas Bryant

Mixing RAM Modules (1gig + 2gig = 3gig)

Hello,
I am about to buy a Mac Mini and I am on a tight budget. The one thing I want to do for sure is upgrade the memory, but I'm in a quandary of sorts given my budget. The retailer where I want to buy the Mini from only sells the appropriate RAM for the Mini in 2gig modules. So here's my question: I know it is possible to mix the stock 1gig stick with a 2gig stick to get 3 gig of RAM total, but will it be worth it to me? I realize that the best configuration would be to slap in 2 2gig modules in and just be done with it, but with 3gig, would I be appreciatively shooting myself in the foot and killing the machine's performance, or wouldn't I notice? I need to have the memory installed at purchase because I am physically handicapped and adding the memory myself is out of the question. And after researching how to replace memory on the Mini, I wouldn't have the courage to ask anybody I know to attempt to do it after buying it. Is mixing RAM modules a good idea?
Thanks in advance.
Malcolm

Nope, I am not confused, There does have generation between Mac mini model. Maybe not official, but we all know. Check About This Mac ---> More Info ---> Model Identifier : Macmini2,1 (That means, 2nd generation)
Macmini 3,x (means 3rd generation I supposed)
And the 3rd generation doesn't support Dual Channel, referred to Crucial.com
http://www.crucial.com/store/listparts.aspx?model=Mac%20mini%20%28Intel%20Core%2 02%20Duo%202.0GHz%20DDR3%29%20MB463LL/A&pl=Apple&cat=RAM

Satellite L20-101: Question about memory modules mixing PC2-4300 and PC2-4200

Hello
I have Toshiba Satellite L20-101. It has onboard 512MB RAM (PC2-4300). Today I added another RAM module but this new module is PC2-4200. Is there anything wrong doing this? Both modules are DDR2 and 533MHz and 512MB.

Hi Pawel,
In principle there is no problem with mixing RAM modules of slightly different types but normally the total RAM will only run at the speed of the slower module. If your notebook recognises the correct amount of RAM from both sticks then there will ne no problem.
regards,

Mixing ram

recently got my new imac, and since i use it mostly with logic, and i respect most opinions here, i'll ask this here.
i am thinking about buying a 512 for my imac from someone on craigslist . he pulled it from a MACBOOK. i know both are sodimm and both are pc-5300 - his is hynix, i don't know what mine is. for $75 i could bump my ram by 100% which sounds great, but i've heard some people have reservations about mixing ram. thoughts?
ps. i know matched ram gives a slight performance boost, but i just need more breathing room, and $75 seems like the right price.

yeah kid i'm with jord on this
i just had a big thing with RAMS not long ago leading me to deleting everything on my harddrive and also not being able to install DVD and app been crashing alot
but after I removed them rams things runs smooth
so RAMS plays a big roll in your system, so get the best and make sure they match and work as well
stash

Mixing RAM Manufacturers?

My apologies if this has been asked before; I searched the forum but couldn't find anything that answered my question properly. So-called 3rd party Memory is new territory for me.
I'm looking to upgrade the RAM in my iMac at home; it's a late 2006 20" 2.16 C2D.
I was wondering if anybody could tell me if mixing RAM by different manufactures will cause any adverse effects or instability? Of course taking into account that the memory is in perfect working order. Also, what manufacturers available in the U.K are most reputable with regards to stability and useful working life? I work in music production so good RAM and stability is a must.
Currently I am considering a single Crucial 2GB module, mainly because they seem to have a good reputation around the forum and it's very reasonable priced.
http://www.crucial.com/uk/store/mpartspecs.aspx?mtbpoid=5A5FD16EA5CA7304
I'm also considering buying a further 1GB module (possibly Kingston) soon after should 2.5GB in the computer not be enough.
Lastly; would there be any benefit to buying a second 2GB module (instead of the 1GB)? I know each slot can accept a 2GB stick, but I keep getting conflicting info as to whether 4GB can actually be addressed in the late 2006 white 20" iMac (despite the spec being 3 gigs).
Cheers.

£32 for one 2GB module! Now I feel seen-off. At the end of November I decided to buy just a 1GB SODIMM as that was £17 versus the £57 they wanted for a 2GB modules. Today I could have bought a full 4GB for £64. Nevermind, I don't actually need that much RAM.
At those prices I'd buy 2GB now and then 2GB later. You'll get to use 3.3GB as den.thed says and because you'll have two modules from the same OEM you'll be sure they will pair up and you'll get the benefit of matched RAM.
I'm also going to re-iterate my usual gripe about Kingston: Kingston Value RAM (slightly more than Crucial) doesn't work in Macs (Kingston themselves told me that). It caused Kernel Panics in my old iMac. If you use Kingston System Specific RAM (about twice the cost of Crucial) it'll work just as well as the Crucial.
mrtotes

Mixing RAM amounts.

I plan on upgrading our 20 inch 2 GHZ intel imac. There is currently only 1 gb of ram and we plan on buying a 2 gb card to put in the other bay. Someone told me we can't mix memory amounts and we either need to have either 2 1 gb cards or 2 2 gb cards. Is this true our can we mix amounts like we had planned?

shalldf wrote:
So it would be better to get 2 gb of ram to make a total of 3 gb of ram
even though it is unmatched cards
Yes, for most users, 1GB + 2GB is better than a 2 x 1GB matched pair.
(Can't be more definite than that -- it depends on your application mix.)
instead of another 1 gb to have 2 matched 1 gb ram cards .....
Adding another 1GB card to an existing 1GB does not guarantee
that you'll have a "matched pair." There's more to matching than
having equal sizes, but the details of what constitutes a match
are a software (firmware?) mystery. It depends on the bits stored
in the memory cards' SPD (Serial Presence Detect) chips.
I'm not aware of any way to determine whether the installed cards
are being treated as a matched pair.
Looby

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 pc2100 &pc3200

My system currently has one stick of PC2100 RAM, 512MB.
I would like to bring my system memory up to a gig of RAM, but I don't want to buy another stick of PC2100, cause it won't help me for future upgrades. but i of course don't want to just get rid of the PC2100 stick i already have.
would there be any harm in mixing the PC2100 with PC3200? I know the PC3200 would just run at 133/266, just wondering if any problems/instability might occur my mixing the two.
I'll WILL match brands however, and make sure they are both Kingston Technology, cause i've heard that this kind of mismatch can definitely cause problems.

Mixing RAM such as you are proposing, is always a crapshoot. It may work ok, but I would think very hard before trying it. You might be able to make it work by setting the timings manually, but even that does not always work.
I would hate to see you buy PC3200, and then not be able to use it with the existing RAM.
You may be better off buying enough PC3200 to replace the existing RAM, while upping the total amount of ram, and avoiding the trouble all together.
While some have claimed to have no problems mixing RAM, most have had bad luck with trying it.

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 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 SIZES in Late 2013 i7 27" iMac

Just assume all ram sticks are the same specs.......
Can I mix ram SIZES in Late 2013 i7 27" iMac? I.E. : two - 4 GB and two - 8 GB?

You should try to balance RAM out as equally as possible between available slots.
For example, 2 4 4 4, 2 2 4 4, 2 2 2 4, but not 2,4,8,0. And where you only have two slots, 2 2, 2 4, 4 4, and so on.

Mixing RAM... DDR3L and DDR3.

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