Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

WilliamG

macrumors G3
Original poster
Mar 29, 2008
9,920
3,800
Seattle
I'm reading issues, but not successes.

Just curious who has upgraded their 27" 2012 iMacs with 32GB of this RAM without issues (reading 1600mhz in the System properties).

Cheers, guys!
 

randy98mtu

macrumors 65816
Mar 4, 2009
1,454
140
I ordered 32gb as well. I may put a pair in my 17" MBP since I don't really feel that I NEED 32 in the iMac, but 16 might help in the MBP when working in Lightroom.
 

photoz

macrumors member
Jun 17, 2006
73
3
I just ordered 32GB of this model, hope that 1.5V is not the issue.

Fingers crossed.
 

Arman

macrumors regular
Aug 27, 2008
204
1
SoCal
The issue arises from mixing the Corsair Vengeance ram with Apple stock ram. Should have no problem running a pure Corsair setup regardless of memory amount.
 

photoz

macrumors member
Jun 17, 2006
73
3
The issue arises from mixing the Corsair Vengeance ram with Apple stock ram. Should have no problem running a pure Corsair setup regardless of memory amount.

Hope this is the case, it will be all Corsair in there.
 

Arman

macrumors regular
Aug 27, 2008
204
1
SoCal
It's not a major issue. All that happens is the memory speed downgrades to 1333mhz from 1600mhz. Arguably probably causes less than 3% hit in performance if u were comparing the same amount of memory(16 single source vs 16 mixed sources). It could equally be argued that any hit in memory speed would be outweighed by increase in overall amount of ram (eg going from 16 to 24gb)
 

Rezox

macrumors newbie
Jan 2, 2010
16
0
After searching around for recommendations, I landed on Crucial instead of the Corsair and here's why:

1. Apparently 1.35V memory comes standard in the iMac from Apple. I have been reading that 1.35V produces less heat and requires less power than the 1.5V. Maybe this is paranoia, but I just can't see the difference in CL worth the voltage increase - See next point.

2. Comparing the CL10 vs CL11, I have not seen anyone claim a performance benefit.

3. Technically, the crucial vengeance ram is not a "Mac Recommended" Ram, unlike the Crucial or OWC memory.

4. Generally any performance benefits don't exist between the two choices, so I opted to choose stability vs. unknown.

If anyone has any other feedback I welcome it.
 

Arman

macrumors regular
Aug 27, 2008
204
1
SoCal
After searching around for recommendations, I landed on Crucial instead of the Corsair and here's why:

1. Apparently 1.35V memory comes standard in the iMac from Apple. I have been reading that 1.35V produces less heat and requires less power than the 1.5V. Maybe this is paranoia, but I just can't see the difference in CL worth the voltage increase - See next point.

2. Comparing the CL10 vs CL11, I have not seen anyone claim a performance benefit.

3. Technically, the crucial vengeance ram is not a "Mac Recommended" Ram, unlike the Crucial or OWC memory.

4. Generally any performance benefits don't exist between the two choices, so I opted to choose stability vs. unknown.

If anyone has any other feedback I welcome it.

Ok I caved in and deciding to return Corsair ram. Just went ahead and picked up 32GB of Crucial site. :rolleyes:
 

R3DH3R0

macrumors regular
Apr 27, 2010
125
11
I was going to get this but now going to pass. Anyone use Samsung Ram? I know Apple used to use them in their machines.

http://m.newegg.com/Product?itemNumber=N82E16820147092

That's just the 8gb kit. Ill probably pick up the 16gb one.
 

themcfly

macrumors regular
Jul 20, 2011
144
272

Jazwire

macrumors 6502a
Jun 20, 2009
900
118
127.0.0.1
Just got my 2nd 16GB pack today, (after the whole not matching with stock ram fiasco)

Everything is running great with 32GB of Corsair Vengeance, just don't mix it.
 

Kiole

macrumors newbie
Dec 9, 2012
10
0
I'm using 32gb purchased off amazon without a single issue in my new 27" BTO.
 

randy98mtu

macrumors 65816
Mar 4, 2009
1,454
140
I got the 32 GB today. I have 16 of it in my 17" MBP. Interestingly, despite being listed as a 1333 machine with max ram of 8 GB, it shows 16 GB running at 1600 mhz. I tried both pairs and they both seem to work fine. Interesting that it can't be mixed, but I was thinking about that due to the voltage difference. Guess I'll go 32 in the iMac and back to 8 in my MBP.
 

WilliamG

macrumors G3
Original poster
Mar 29, 2008
9,920
3,800
Seattle
Just to update, running 32GB of the Corsair Vengeance in my 27" 2012 iMac with no issues. 1600mhz reported, and everything is running great.
 

photoz

macrumors member
Jun 17, 2006
73
3
Just to update, running 32GB of the Corsair Vengeance in my 27" 2012 iMac with no issues. 1600mhz reported, and everything is running great.

+1 here as well. Have 32GB installed for 3 days now, no issues at all. Runs at 1600. Ran a memtest as well, all good.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.