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Final word on using 1.65V memory kits with Ivy Bridge?

post #1 of 7
Thread Starter 
Hello,
I haven't not found much conclusive information on this.

Are 1.65V memory kits safe to use with Ivy Bridge/Z77 for 24/7? I've read that VCCIO should be within 0.5v of the DRAM voltage, so VCCIO for a kit like that should be at 1.15v.

Does this apply to Ivy or was it a guideline only for Sandy? I've seen people say difference of more than 0.5 will slowly kill the IMC on Ivy and then I've seen people say that using too much VCCIO voltage (greater than 1.08v) does greater damage to the IMC on Ivy. So which one is the case for Ivy?

For now I am holding my memory way back to run it at 1.5V to keep things within spec. I would appreciate any solid info.
Thanks.
post #2 of 7
Quote:
Originally Posted by MaxT View Post

Hello,
I haven't not found much conclusive information on this.

Are 1.65V memory kits safe to use with Ivy Bridge/Z77 for 24/7? I've read that VCCIO should be within 0.5v of the DRAM voltage, so VCCIO for a kit like that should be at 1.15v.

Does this apply to Ivy or was it a guideline only for Sandy? I've seen people say difference of more than 0.5 will slowly kill the IMC on Ivy and then I've seen people say that using too much VCCIO voltage (greater than 1.08v) does greater damage to the IMC on Ivy. So which one is the case for Ivy?

For now I am holding my memory way back to run it at 1.5V to keep things within spec. I would appreciate any solid info.
Thanks.

Sandy/Ivy both have the IMC on the chip itself. Intel doesn't recommend going over 1.5v, but 1.65v does work fine.
I had the same worry last year when i picked up an 8GB kit of Kingston HyperX without realizing it was 1.65v.
It should work fine. Just don't apply any further settings that could do any damage.
   
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post #3 of 7
1.65v is fine.

Pretty sure the IMC voltage to ram voltage ratio doesn't apply to IVY. Doesn't for SB-E anyways. The 0.5v delta just helps stability.



http://www.overclock.net/t/1247413/ivy-bridge-overclocking-guide-with-ln2-guide-at-the-end

Follow this guide and you'll be ok.
post #4 of 7
Thread Starter 
Quote:
Originally Posted by MrTOOSHORT View Post

1.65v is fine.

Pretty sure the IMC voltage to ram voltage ratio doesn't apply to IVY. Doesn't for SB-E anyways. The 0.5v delta just helps stability.



http://www.overclock.net/t/1247413/ivy-bridge-overclocking-guide-with-ln2-guide-at-the-end

Follow this guide and you'll be ok.

Thanks, I already read all the guides. They don't seem to mention the topic of running 1.65V memory with Ivy.
post #5 of 7
Thread Starter 
Quote:
Originally Posted by PoisonousRakija View Post

Sandy/Ivy both have the IMC on the chip itself. Intel doesn't recommend going over 1.5v, but 1.65v does work fine.
I had the same worry last year when i picked up an 8GB kit of Kingston HyperX without realizing it was 1.65v.
It should work fine. Just don't apply any further settings that could do any damage.

Hi,
I am not worried about 1.65 on the RAM. I am worried about the VCCIO being only at 1.05, which is more than 0.5v difference or raising it to 1.15v which is over 1.08 Intel recommended max.
Edited by MaxT - 7/25/13 at 3:56pm
post #6 of 7
Thread Starter 
double post
post #7 of 7
Sin0822's guide shouldn't be taken lightly. He a smart and well respected member around the computer world. If the going over 0.5v delta between IMC and dram voltage was a problem, he'd make sure to mention it in his guide. Quickly going through the guide for you, there is no mention.

SB-E maxes out at 2500Mhz or so on the memory, so then why is there 2800 Mhz+ ram kits out there rated as 1.65v? Because they are for IVY and Haswell that can push those potentially push those speeds.
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