Max ram voltage on Ivy Bridge?

[Sohaltang]

How far can I push ram? I now intel says +\- 5% from 1.5 volts. Anyone running 1.65 or higher? Anyone burned up their CPU?

 

[ShintaiDK]

Warranty is void above 1.575V.

 

[Galatian]

Huh? Every RAM above 1600 MHz I can see in stores requires 1.65 V? How can that void your warranty?

 

[ShintaiDK]

Huh? Every RAM above 1600 MHz I can see in stores requires 1.65 V? How can that void your warranty?

Because you can buy 1.65v doesnt mean your CPU support it without overvoltage and warranty void.

And plenty of 1866Mhz memory at 1.5V for example: (18 1.5V vs 1 1.65V)
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007611&IsNodeId=1&Description=1866Mhz%20DDR3&name=Desktop%20Memory&Order=BESTMATCH

At 2133Mhz, there is simply no 1.65V anymore on Newegg. All is 1.5V:
http://www.newegg.com/Product/Produc...z+DDR3&x=0&y=0

All memory chips are 1.35V or 1.5V as well. Any 1.65V are simply overvolted.

 

[Galatian]

Great! Learned yet another thing...the store I usually shop at here in Germany, seems to only offer RAM modules with 1.65 V above 2000 Mhz.

I guess former Intel and AMD processors allowed for higher voltage RAM then?

 

[Sohaltang]

Yeah I know what intel says. Was wondering if anyone has had any real world problems with higher voltages. I'm sure many people have done it. Just realized that I have been running 1.65 to get the timings as advertised on my ram.

 

[blastingcap]

Warranty is void above 1.575V.

Which happens to be 5% above 1.5v, and because natural variations from your PSU and mobo may introduce spikes up to 5% higher than nominal voltage anyway, do not overvolt your RAM above 1.5v. In other words, if you set your RAM to 1.5v it may occasionally spike up to 1.575v anyway.

 

[ShintaiDK]

Great! Learned yet another thing...the store I usually shop at here in Germany, seems to only offer RAM modules with 1.65 V above 2000 Mhz.

I guess former Intel and AMD processors allowed for higher voltage RAM then?

The problem is that there is no JEDEC standard for 1.65V. Its 1.35V and 1.5V for DDR3. Overvoltage memory is a terrible thing to sell anyway.

LGA1156/LGA1366 might have supported 1.65V. But I cant remember off hand. Its in the datasheets for the CPUs so you can freely check yourself.

If you shop in germany/EU, check geishalz.at. Then you should have no problem finding 1.5V.

 

[Sohaltang]

I ran 1.65 corsair 7-8-7-20 for 3 months no problem. I just down timing to 9-9-9-24 because I ordered gskill 9-9-9-24 8gb kit and wanted to make sure it would work. I plan to up the voltage to something in between to get best of both worlds. Just don't wanna burn up my 3770k. At thins point I think the only issue will be burning up the g-skills ram.

 

[BFG10K]

I ran 1.65 corsair 7-8-7-20 for 3 months no problem. I just down timing to 9-9-9-24 because I ordered gskill 9-9-9-24 8gb kit and wanted to make sure it would work. I plan to up the voltage to something in between to get best of both worlds. Just don't wanna burn up my 3770k. At thins point I think the only issue will be burning up the g-skills ram.

At 1.65V you're basically over-volting your CPU's memory controller, which risks permanent damage to it. Do you think getting 7-8-7-20 timings is worth that risk?

I'll bet you'd never even see a performance difference outside of certain synthetic benchmarks.

 

[C.C.]

What are you guy's talking about? I personally run my G. Skill 16GB kit @ 2133 @ 1.65V on a heavily overclocked 3770K @ 4.8Ghz without any issues..I have ran this cpu 24/7 running F@H with ZERO issues for nearly a year now..I know many others that run 1.6~1.65V memory without any issue on SB/IV cpus..

 

[ShintaiDK]

What are you guy's talking about? I personally run my G. Skill 16GB kit @ 2133 @ 1.65V on a heavily overclocked 3770K @ 4.8Ghz without any issues..I have ran this cpu 24/7 running F@H with ZERO issues for nearly a year now..I know many others that run 1.6~1.65V memory without any issue on SB/IV cpus..

I can run across the freeway. Everyone should now do it since its obviously safe

 

[Sohaltang]

At 1.65V you're basically over-volting your CPU's memory controller, which risks permanent damage to it. Do you think getting 7-8-7-20 timings is worth that risk?

I'll bet you'd never even see a performance difference outside of certain synthetic benchmarks.

When I built my old machine this was what frys had on sale. I never even noticed the voltage. Was just looking for some decent ram. At the time 1600 MHz was a big deal, the timings were just a bonus. Onlyrecently have I learned that 1.65 RAM was poorly binned 1.5.

Anyhow I got 8 GB of g.skill today and going to try to mix it with the 4gb of 1.65 tommorrow. Hopefully I can OC the g.skill with 1.6v and get both kits to work.

 

[Madmick]

Which happens to be 5% above 1.5v, and because natural variations from your PSU and mobo may introduce spikes up to 5% higher than nominal voltage anyway, do not overvolt your RAM above 1.5v. In other words, if you set your RAM to 1.5v it may occasionally spike up to 1.575v anyway.

You mean don't overvolt it if you want to maintain your warranty, right, BC, or do you find such a voltage a legitimate hazard to an Ivy Bridge and do you avoid overvolting altogether?

In that case, I'm guessing that you loosen timings to overclock your RAM's frequency?

 

[dawp]

What are you guy's talking about? I personally run my G. Skill 16GB kit @ 2133 @ 1.65V on a heavily overclocked 3770K @ 4.8Ghz without any issues..I have ran this cpu 24/7 running F@H with ZERO issues for nearly a year now..I know many others that run 1.6~1.65V memory without any issue on SB/IV cpus..

It runs fine NOW but long term there is a good chance that will damage your cpu since it wasn't designed for that kind of sustained voltage.

I did a bit of looking when I upgraded my system from a i7 950 that had ram rated at 1.65v and decided to just sell it all as a package deal, motherboard/cpu/ram.

I also down volted ram in 2 other system from that have 15 3570k when I upgraded them from phenom 1090t and they have been running great at 1.5v. while that ram is rated at 1.65v.

I'd rather not take the chance on damaging the cpus.