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1.5v vs. 1.35v RAM in 2012 cMBP
- Thread starter whdigital
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This thread has left me very uncertain as to which ram to use. I have a 2012 13" base macbook pro. I've upgraded the RAM to 2x8GB Corsair Vengeance sticks. Shortly have the upgrade I had a couple of random kernel panics, but have been using the laptop fine for a about a week now.
The RAM that shipped with the laptop was hynix HMT325S6CFR8C, which is listed as 1.5v ram. Seems like others are getting samsung 1.35v RAM. Anyone get this ram in their 2012?
Ran memtest on the Corsair RAM and it checked out. Though reading this thread and the kernel panics I got have me spooked.
I'm not running chrome, kp's were both for WindowServer.
The RAM that shipped with the laptop was hynix HMT325S6CFR8C, which is listed as 1.5v ram. Seems like others are getting samsung 1.35v RAM. Anyone get this ram in their 2012?
Ran memtest on the Corsair RAM and it checked out. Though reading this thread and the kernel panics I got have me spooked.
I'm not running chrome, kp's were both for WindowServer.
Interesting... I think a few of us are confirming 1.35v chips in the 15" models, but not at all sure about the 13" one. You might try opening the MBP back up and "re-seating" the sticks just to see if that makes any difference.
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Interesting... I think a few of us are confirming 1.35v chips in the 15" models, but not at all sure about the 13" one. You might try opening the MBP back up and "re-seating" the sticks just to see if that makes any difference?
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Interesting... I think a few of us are confirming 1.35v chips in the 15" models, but not at all sure about the 13" one. You might try opening the MBP back up and "re-seating" the sticks just to see if that makes any difference?
I downloaded memtest86 v5 which has ivy bridge support and ran it with the corsair vengeance ram. It got about 4 min in and the CPU was pushing 98 degrees Celsius. The screen froze to black with rainbow lines. I'm guessing it overheated. I put the stock ram back in and ran memtest again. This time it ran fine and the CPU was in the mid 80s occasionally hitting 90 and always coming back down.
I returned the corsair vengeance ram and picked up this ram:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226323
It was the only 16gb 1.35v I could find. Installed it yesterday, so far so good. Haven't run it through memtest yet. Time will tell.
I returned the corsair vengeance ram and picked up this ram:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226323
It was the only 16gb 1.35v I could find. Installed it yesterday, so far so good. Haven't run it through memtest yet. Time will tell.
Very strange. It certainly sounds like the CPU didn't like the 1.5v the Corsair RAM was demanding, but if the stock RAM is also running at 1.5v the Corsair stuff should also have work. Perhaps there is some other incompatibility with the Corsair RAM?
Certainly is. I'm not a RAM expert by any means but the hynix website lists the voltage for the stock ram as: VDD=1.5V +/- 0.075V
Perhaps it can adjust the voltage down based on the processor? I also saw that ram as tested by Intel with the ivy bridge platform. So it is on the "approved" list.
I've seen others report successful use the Corsair ram, however that is by no means scientific. Just be interested to hear if others have had any issues with that ram and what they observed.
Would you mind running your new 16gb 1.35v through memtest and see how it goes and post the results? I'm currently using 8GB of Crucial RAM that I bought last week (1.35v as well) and it's running great and passed memtest, but if I can spend $50 more and get that 16GB of RAM, I'll go for it.
Thanks.
Ugh I just bought the Corsair Vengeance 16GB 1.5v for my 13" MBP 2012 because it got so good feedback on Amazon.
I bought it off eBay. Now I dont know if I should install it or just resell it since it's reportedly causing instabilities.
Anymore feedback with the same setup?
I bought it off eBay. Now I dont know if I should install it or just resell it since it's reportedly causing instabilities.
Anymore feedback with the same setup?
The stock Hynix RAM installed in my 15 " 2.6 MBP runs at 1.5v.
hmt351s6cfr8c
http://www.skhynix.com/products/computing/view.jsp?info.ramKind=20&info.serialNo=HMT351S6CFR8C
There should be no issue with 1.5v. Of note, the 16GB of Corsair Vengeance fails AHT and MemTest. Exchanging for a new set. Will report back.
hmt351s6cfr8c
http://www.skhynix.com/products/computing/view.jsp?info.ramKind=20&info.serialNo=HMT351S6CFR8C
There should be no issue with 1.5v. Of note, the 16GB of Corsair Vengeance fails AHT and MemTest. Exchanging for a new set. Will report back.
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I got my MacBook Pro 15" mid-2012 a couple weeks ago and I tried putting in a pair of Corsair Vengeance 8GB DDR3 1600mhz into it and the machine didn't POST at all. I'm also thinking the 1.5v sticks could be the problem. I was lucky to be able to return them though. I just ordered a pair of Mushkin 8GB 1.35 sticks (http://www.newegg.ca/Product/Product.aspx?Item=N82E16820226322) and hopefully these will work.
Got my replacements from Amazon.
10 passes with memtest and extended AHT, passed.
I had a similar experience. I had ordered a matched set of the Corsair Vengence 16GB modules, and the first set would crash my Late 2011 15" MBP right after startup, not even doing anything.
I returned it and reordered two individual sticks of 8GB Vengence modules (this time from Newegg, as it was a few dollars cheaper than the set) and the new sticks have been running fine. Not one kernel panic. I haven't done any video editing or memtests yet, but imagine people with problems from the start just got a bad set of RAM.
I didn't see any problems right away. I like to run memtest to be sure I won't though.
I can confirm that my 2012 cMBP shipped with a 2x2GB set of Hynix HMT325S6CFT8C chips seen here. These stock chips run at 1.5v, so therefore, if you have any concerns, I would suggest sticking to the specifications listed on the SKHynix website.
As for me, I upgraded my RAM to an 2x4GB set of Mushkin Enhanced RAM, running at 1.5v. I've had these in my machine for exactly one week, and they are performing exceptionally well. I'd also like to note that they were in fact cheaper than Crucial. As of now I would personally recommend these. I grabbed them here, at Newegg.
As for me, I upgraded my RAM to an 2x4GB set of Mushkin Enhanced RAM, running at 1.5v. I've had these in my machine for exactly one week, and they are performing exceptionally well. I'd also like to note that they were in fact cheaper than Crucial. As of now I would personally recommend these. I grabbed them here, at Newegg.
Just installed my Corsair Vengeance 16GB 1.5v with no problems at all
Have you run memtest for a decent amount of time to make sure it works well under load?
I bought some Samsung 1.35v 1600mhz ram a couple months ago and they work flawlessly. Look for them in amazon. These ones I got.
http://www.amazon.com/Samsung-Elect...d=1343946251&sr=8-2&keywords=samsung+1600+ddr
BTW, I have a 2011 MBP which uses 1.5v ram.
http://www.amazon.com/Samsung-Elect...d=1343946251&sr=8-2&keywords=samsung+1600+ddr
BTW, I have a 2011 MBP which uses 1.5v ram.
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Been running the Corsair Vengeance since June 14 in the new cMBP you see in the signature line.
This RAM has posed no problem at all. I run the hell out of this MBP and the harder I pushed it the harder it worked and pushed everything through it.
In my 2011 similarly configured MBP I used the Corsair 16GB for that machine (not the Vengeance RAM that is configured for the 2012) and there were alot of people all over that said that this cheap memory was gonna ruin that machine, well in the 7 months that I was running that memory I had zero issues, no beach balls, just smooth sailing. In a few threads about that Corsair memory I asked for facts with details on exactly the damage that it would cause using Corsair and those threads never got a reply with any facts and details. The only difference that was factually with details was the cost of the Corsair vs the OWC other expensive "anointed" brands.
As for the Vengeance RAM, 10 to 12 hour days 5 to 6 days a week with this memory of very intensive MBP use I have had no issues, no excessive fans coming on, no excessive heat and everything seems very normal considering all the editing, rendering and outputting I am doing. Temp under rendering while working on a video is usually 128 degrees and then when I am outputting the video the temp will go up to about 15o degrees and the fans will run anywhere between 5300 to 6000 rpm.
So when folks say they are having issues I somehow feel left out that I am not able to say I have something weird going on
This RAM has posed no problem at all. I run the hell out of this MBP and the harder I pushed it the harder it worked and pushed everything through it.
In my 2011 similarly configured MBP I used the Corsair 16GB for that machine (not the Vengeance RAM that is configured for the 2012) and there were alot of people all over that said that this cheap memory was gonna ruin that machine, well in the 7 months that I was running that memory I had zero issues, no beach balls, just smooth sailing. In a few threads about that Corsair memory I asked for facts with details on exactly the damage that it would cause using Corsair and those threads never got a reply with any facts and details. The only difference that was factually with details was the cost of the Corsair vs the OWC other expensive "anointed" brands.
As for the Vengeance RAM, 10 to 12 hour days 5 to 6 days a week with this memory of very intensive MBP use I have had no issues, no excessive fans coming on, no excessive heat and everything seems very normal considering all the editing, rendering and outputting I am doing. Temp under rendering while working on a video is usually 128 degrees and then when I am outputting the video the temp will go up to about 15o degrees and the fans will run anywhere between 5300 to 6000 rpm.
So when folks say they are having issues I somehow feel left out that I am not able to say I have something weird going on
Too bad samsung doesn't make a 2X8 GB ram
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The problem I have in making a decision on which RAM to get is that Corsair Vengeance Memory doesn't have a 9-9-9-24 latency timing (which is what Apple Ram has). I want to get the absolute fastest, best memory that I will never ever have to upgrade. So, I'm sorta leaning towards the OWC 2x8GB memory which is 1.35v, 1600mhz, CAS latency 9-9-9-24 but it costs $161.99!!
(BTW, link to OWC ram:http://eshop.macsales.com/item/Other World Computing/1600DDR3S16P/)
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