Hi, I've googled this for the last 4-5 days with no real definitve answer.

What's the general opinion on max vram voltage with the 3770ks memory controller? some say 1.5v and others upto 1.75v with with OC's. Most of the 2133 ddr Z77 compatible sticks are 1.5-1.6v

Cheers in advance

1.65v 24/7 to be safe, some high speed ram needs 1.75v like the team extreme 3000MHz

Intel spec is 1.5v max.

Most people ignore this but only time will tell.

Matt

mattup said:

Intel spec is 1.5v max.

Most people ignore this but only time will tell.

Matt

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thats sandybridge! ivybridge is 1.6v +, but as stated ram is being sold by ocuk which will only work @1.75v on z77 chipsets/ 3rd gen cpus!!!

http://www.intel.com/content/www/us/en/processors/core/3rd-gen-core-desktop-vol-1-datasheet.html

Page 84, doesn't give a max value, only a typical value of 1.5V.

Oh well if there is only a typical of 1.5V put what you want through it.......


Matt

Thanks gents, I've got my GSkill 2133 running prime stable at 2133mhz T1 with 1.525V (XMP profile for this speed is 2133 T2 @ 1.6v), it needs 1.6v to make 2200mhz T1 so I guess its not worth pushing the voltage up that much just for the extra 67mhz.

Boldie007 said:

Thanks gents, I've got my GSkill 2133 running prime stable at 2133mhz T1 with 1.525V (XMP profile for this speed is 2133 T2 @ 1.6v), it needs 1.6v to make 2200mhz T1 so I guess its not worth pushing the voltage up that much just for the extra 67mhz.

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ask 8pack he is a mem genius and will vouch for 1.6v + 24/7, tbh its not just the mem voltage that will stabilize your mem oc its also the vtt/vccio which can be upped to 1.25v for 24/7

VTT should not go over 1.25 for these 24/7.

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<<-- taken from samsung green tread about 3rd gen mem oc'ing

24/7 on Ivybridge 1.75 is absolutely fine providing VCCIO is not out of control high. XMP for high speed dimms is often set VCCIO at 1.25v and this has been endorsed by Intel.

If I am honest on my benching RIG which gets some hammer I dont run less than 1.85 Vdimm on Hynix , 1.9 on PSC and 2.0v + on BBSE and my cpu are fine. Always running same timings speeds etc stable... VCCIO I run upto 1.35v

Degradation has been noticed by some but they are running high VCCIO over 1.35 and high VDIMM and I think this is where the problem lies and infact it may only be the high VCCIO causing the problem.

^^^^

God hath spoken....Listen to him!

JGStonedRaider said:

^^^^

God hath spoken....Listen to him!

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Correct!!!

and where does your skills lie stoned getting stoned ??? well done!!!

http://communities.intel.com/thread/30798

Intel say 1.5 thats for ivy...

littlepuppy said:

http://communities.intel.com/thread/30798

Intel say 1.5 thats for ivy...

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Regarding your first question there is not any Intel processor that supports more than 1.5V memory.

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^ Intel.

I'm pretty sure people have been running v1.65+ for years. With overclocking, it's the risk you take. For 2200MHz CAS9, it's a risk I'm willing to take.

Yep, accept that its just it seemed to be stated to the OP that intel say 1.6v for Ivy (which they dont) so running at anything other than 1.5 may well be fine, but its out of spec.

Just run with what your comfortable with,most ram will run 2133mhz with 1.55v