Core i7/X58 Overclocking Thread

[safan80]

i got an "a" batch myself, nothing wrong with it, great chip IMO 4.2 GHz stable. "b" batches supposed to be better?

in the past b batches have been a lot hotter than A chips.

[Chicken Patty]

in the past b batches have been a lot hotter than A chips.

Thanks. These chips all run super hot as it is, so having the hotter running of them all would just suck!!! Im in the process of planning a really crazy watercooling setup, just haven't made up my mind yet. These i7's produce a lot of heat, im'ma give it something to cool off with

[safan80]

running great so far.. this is the new LinX 5.4.1 which works great with i7

[bench2die]

Thanks. These chips all run super hot as it is, so having the hotter running of them all would just suck!!! Im in the process of planning a really crazy watercooling setup, just haven't made up my mind yet. These i7's produce a lot of heat, im'ma give it something to cool off with

Ya these chips are no joke when it comes to heat. The other day I did wprime 1024 at 4.45 ish and my idle temps where in the high 10c low 20c area and by the time the test was over it was in the 78c range on full load

[Chicken Patty]

Ya these chips are no joke when it comes to heat. The other day I did wprime 1024 at 4.45 ish and my idle temps where in the high 10c low 20c area and by the time the test was over it was in the 78c range on full load

what are you using to cool it?

[bench2die]

what are you using to cool it?

feser triple rad with a portable ac unit on the rad. I can get through 06 at 4.58 no problems but wprime it would do a system halt at the end of the run at those speeds. (I thought maybe I could get away with 8 threads at that speed but I guess not hahah)

[Chicken Patty]

feser triple rad with a portable ac unit on the rad. I can get through 06 at 4.58 no problems but wprime it would do a system halt at the end of the run at those speeds. (I thought maybe I could get away with 8 threads at that speed but I guess not hahah)

man the triple rad can't even handle it, how much voltage you running through it?

[Hot'n'Chilly]

Guys, somebody told me that my QPI voltage might be a bit high, as might my RAM (its above its 1333 rating). Any suggestions as to why I'm stuck so low?

CPU Ratio: 17
BCLK: 195
DRAM: 1563mhz
UCLK (UnCore): 3322mhz
QPI: 7038 MTs

CPU Voltage: 1.2375v
PLL Voltage: 1.9c
QPI (unCore) Voltage: 1.4v
DRAM Voltage: 1.62v

[bench2die]

man the triple rad can't even handle it, how much voltage you running through it?

I have a mcr220 do you think I should add it to the loop? and for those speeds around 1.536 vcore in windows. obviously I dont run that 24/7 lol

[mremulator]

Guys,

This setting is not in the Asus Bios??

IOH/ICH I/O - 1.65v

[safan80]

Guys,

This setting is not in the Asus Bios??

IOH/ICH I/O - 1.65v

it might be called something else in the asus bios.

[mremulator]

it might be called something else in the asus bios.

Figured it out... IOH/PCIE.

I have tried 1.4v QPI now, 1.65v IOH/PCIE and 1.55v Vcore. Still will not Prime (small FFTs) with HT enabled @ 4GHz.

I'm giving up and going to run with a rock solid 3.8GHz (19x200) 1.3v ~60c. I'm happy with that.

Must just be unlucky with chip I guess.

[GNU]

Wrong Thread sorry.

[SteveRo]

Reading through several of the intel i7 threads I see a lot of folks starting to bench with MUCH higher volts for dimm (1.7, 1.8, 1.9v!) and qpi (1.5, 1.6).
If my memory serves me right - the intel max spec is something like - vdim no higher than 1.65 and qpi no higher than 1.35v?
What are the max safe voltages for vdim and qpi?
Currently at 4.1 (ht on) and 4.3 (ht off) prime stable - keeping vdim at 1.64v and qpi at 1.355v.
I think I could probably go higher if I was to raise vdim and/or qpi?
Your thoughts and wisdom would be appreciated, thanks!

[eva2000]

According to intel (bit-tech) article vdimm >1.65v is allowed as long as vdimm with within 0.5v of cpu vtt or what asus termed qpi/pll volts. So if you went by cpu vtt max of 1.35v, then vdimm 1.85v would be safe. But i'm seen some folks throuh max cpu vtt specs of 1.55v ?? so then vdimm of 2.05v would be max. Hopefully, someone clears this up eventually heh

[Extelleron]

This is what I have gotten so far w/ Core i7 920 + P6T Deluxe.........

BIOS settings:
CPU Voltage: 1.33750V (LLC disabled)
Uncore Voltage: 1.33750V
PLL Voltage: Auto
Memory Voltage: 1.62V



Passed 199 iterations of Linpack 64-bit, definitely good enough for me. There is an error with the latest LinX that makes it stop before completing though so that is why it shows 199/200.

3.8GHz @ 1.264V seems pretty good but 4.0GHz (191x21) is a no go so far. With 1.4V in BIOS (1.320V under load) I get BSOD within a minute or so.



$150 G. SKILL DDR3-1333 = 18 GB/s is pretty good IMO.

[Chicken Patty]

I have a mcr220 do you think I should add it to the loop? and for those speeds around 1.536 vcore in windows. obviously I dont run that 24/7 lol

is your pump strong enough?

[ReverendMaynard]

According to intel (bit-tech) article vdimm >1.65v is allowed as long as vdimm with within 0.5v of cpu vtt or what asus termed qpi/pll volts. So if you went by cpu vtt max of 1.35v, then vdimm 1.85v would be safe. But i'm seen some folks throuh max cpu vtt specs of 1.55v ?? so then vdimm of 2.05v would be max. Hopefully, someone clears this up eventually heh

That is correct eva. Keep a 0.5v buffer between the two voltages but that really only applies to the upper limits. Those folks going 1.55v cpu vtt, even if they're keeping the 0.5v buffer are rolling back the lifespan rapidly on their cpu.

But hey, that's what extreme everclocking is all about right?

[SteveRo]

Reverend - very good - qpi of 1.55 is a bad thing - got that.
What do you consider to be a safe qpi v for 8-12 hrs per day - and if CPU can be allowed die in say ~3 years?

[ReverendMaynard]

Reverend - very good - qpi of 1.55 is a bad thing - got that.
What do you consider to be a safe qpi v for 8-12 hrs per day - and if CPU can be allowed die in say ~3 years?

Personally, I take Intels maximum and apply the rule of +0.1v. Intels max is 1.35v, my max is 1.45v for long term regular use. Really depends on how hostile that cpu's environment is. Cooling is huge of course, but also how much load and what kind of load. If I were to fold on this rig, 100% HT enabled I would definitely stick with Intels max if I had a 3 year window.

[Kensek]

All the new Low Voltage DDR3-2000+ CL7 Ram coming out operates at 1.65 QPI Volts. Along with 1.65 Dram volts.

Both Corsair and G. Skill said let the QPI volts fly, but just watch your NB Temps.

These Ram Modules will not Operate at their specs unless the QPI is at least 1.55v

I'm running the G. Skill Now at DDR3-2050 at CL8

[Xello]

You can follow Reverend's advice but the truth is no one can answer your question, not for another 3 years

There are people who also say 1.55v VTT, even 1.65v is fine and will not degrade your cpu as long as you keep the 0.5v max between VTT and vdimm. Some people are needing this to get their old ddr3 2v+ kits working at stock.

You need to make up your own mind, or just go with someone else's mind i guess. Personally i don't want to go over 1.45v vcore and 1.45v VTT right now, because i don't need to for the clock i want

[ReverendMaynard]

You can follow Reverend's advice but the truth is no one can answer your question, not for another 3 years

There are people who also say 1.55v VTT, even 1.65v is fine and will not degrade your cpu as long as you keep the 0.5v max between VTT and vdimm. Some people are needing this to get their old ddr3 2v+ kits working at stock.

You need to make up your own mind, or just go with someone else's mind i guess. Personally i don't want to go over 1.45v vcore and 1.45v VTT right now, because i don't need to for the clock i want

Absolutely. I just play a bit conservative but still over Intels maximum. It's done well for me in the past so I ride it.

[Xello]

Same here, and if the vast majority of us are getting desired 24/7 settings between 3.8 and 4.4ghz with these voltages then there's no real need to go over them, unless benching or you have a really bad chip

[Hornet331]

Personally, I take Intels maximum and apply the rule of +0.1v. Intels max is 1.35v, my max is 1.45v for long term regular use. Really depends on how hostile that cpu's environment is. Cooling is huge of course, but also how much load and what kind of load. If I were to fold on this rig, 100% HT enabled I would definitely stick with Intels max if I had a 3 year window.

3 years? I dont plan to keep my current Ci7 longer then one year (westmere release)