Core i7/X58 Overclocking Thread

[eva2000]

i7 920 @22x CPU Multiplier Tests

Looks like there's more uses for Intel's Turbo mode on DFI UT X58-T3EH8 especially for single threaded benchmark/apps like Super Pi. In bios set Turbo enabled, EIST enabled, Set to 1 core enabled and you have access to fixed 22x cpu multiplier

Quick Prime95 @22x134 Bclk with DDR3-1600/3200 DRAM/Uncore frequency set in bios for 6x DRAM memory multiplier.



Will test more to see how far I can push cpu and Bclk with 22x multiplier

Also flashed from intial 12/18 official bios to 12/31 beta bios for improved DDR3 memory compatibility as well as support for latest setFSB 2.1.88

More 22x cpu multiplier results:

• With 22x multiplier, seems max bclk in memtest is 208 bclk compared to 21x multiplier and 224 bclk
• With 22x multiplier, max windows bootable is well below 200 bclk, I booted into windows at 190bclk and using new setFSB 2.1.88 bumped bclk to around 200-205 for max screenshot and validation. Compared to 21x multiplier and 220bclk bootable from bios into windows.

@22x205 = 4515Mhz at 1.52v idle (vdimm = 1.875v bios)





@22x200 = 4418Mhz at 1.52v idle (vdimm = 1.875v bios)

[SteveRo]

Ok so trying to push the boundaries here a little – see below.
Trying to figure out if I can get 4.2 HT on - prime and linpack stable.
So, on air - linpack passed 5 runs but at an outrages temp of 100C about 10 times in quick hits– it is a wonder it did not blue screen or restart
I also ran prime for 5 minutes just for comparison – max temp was 90C, a full 10 degrees less!
So I don’t think this is a doable do on air but I think a good water setup might have a chance on this proc? Your thoughts?

[SteveRo]

eva2000 - do you like your 3520/SSD set up?
I have been very pleased with mine so far - see link in my sig.
Question - I was never able to figure out how to change the block size on the 3520 - what 3520 bios and driver are you using?
Mine is - HPT 3520 FW - v1.2.22.16, BIOS setting utility (driver?) is v1.3.1016
I wonder if a later bios/driver adds the ability to change block size?
I also posted a review and a comparison of raid 0 SSDs at -
http://www.ocforums.com/showthread.php?t=549980
and at -
http://www.ocforums.com/showthread.php?t=552010

EDIT - I see it - "Before plugging in the OCZ core SSDs, I flashed the 3520LF controller to latest bios and firmware versions, 1.40.0416 and 1.3.28.16 respectively." But did this allow you to change the array block size?

[eva2000]

eva2000 - do you like your 3520/SSD set up?
I have been very pleased with mine so far - see link in my sig.
Question - I was never able to figure out how to change the block size on the 3520 - what 3520 bios and driver are you using?
Mine is - HPT 3520 FW - v1.2.22.16, BIOS setting utility (driver?) is v1.3.1016
I wonder if a later bios/driver adds the ability to change block size?
I also posted a review and a comparison of raid 0 SSDs at -
http://www.ocforums.com/showthread.php?t=549980
and at -
http://www.ocforums.com/showthread.php?t=552010

EDIT - I see it - "Before plugging in the OCZ core SSDs, I flashed the 3520LF controller to latest bios and firmware versions, 1.40.0416 and 1.3.28.16 respectively." But did this allow you to change the array block size?

block size is changed from within 3520LF bios on boot up and so yup i could change it see screenshots http://i4memory.com/f9/ocz-core-ssd-...744/#post98279 it's a linked not inline image.



Very happy with my 3520LF/SSD setup just wish i had 4x more SSD for 8xSSD raid hehe

[SteveRo]

eva - I think your later bios gets you the block size adjustment - time for me to upgrade that!
What block size are you using now?

[Hornet331]

i7 920 @22x CPU Multiplier Tests

Looks like there's more uses for Intel's Turbo mode on DFI UT X58-T3EH8 especially for single threaded benchmark/apps like Super Pi. In bios set Turbo enabled, EIST enabled, Set to 1 core enabled and you have access to fixed 22x cpu multiplier

Its the same on the GA Extreme.

If only one core is enabled you get the x22 multi.

[Xello]

inpack passed 5 runs but at an outrages temp of 100C about 10 times in quick hits– it is a wonder it did not blue screen or restart
I also ran prime for 5 minutes just for comparison – max temp was 90C, a full 10 degrees less![/B]

I'm not sure if you can trust that or not, i passed 50 runs yesterday on linX (2hr 50min~) then proceeded to crash after 9hr of blend. I know it's 3hr vs 9hr but from what pretty much everyone says 10 mins of linpack is supposed to be more reliable than 10 hours of blend. I don't know why but i had a feeling this would happen, i'll probably be sticking with prime after all.

[Ranger07]

Would anyone consider 1.45v on 965 cpu too high for a 24/7 set up?. Got it running really sweet at 4.2ghz prime stable HT off, max temps never exceed 70c.

Only reason for asking is a lot of you have really nice chips which need a lot less.

[iboomalot]

Got it running really sweet at 4.2ghz prime stable HT off, max temps never exceed 70c.

70c ???? you list "Custom water"

[Ranger07]

70c ???? you list "Custom water"

Thats after running prime for 8 hours in a pretty warm room. Idle temps are around 35-40c and load temps are 60-70c. Only thing in my system that could do with upgrading is the rad which is a bit outdated but its good enough as the temps are safe.

Its only the long term cpu volts that I'd like to know opinions on.

[SteveRo]

ranger07 - What are your multi's at?
rge helped me find a little trick that you might want to try.
At least for my 965, I found that running high bclock and low multi gave me much lower temp then the other way around - see below -

[SteveRo]

I'm not sure if you can trust that or not, i passed 50 runs yesterday on linX (2hr 50min~) then proceeded to crash after 9hr of blend. I know it's 3hr vs 9hr but from what pretty much everyone says 10 mins of linpack is supposed to be more reliable than 10 hours of blend. I don't know why but i had a feeling this would happen, i'll probably be sticking with prime after all.

I agree - I doubt my 4.2/HT on would last an hour on prime.
I think I might drop the cpuv a couple clicks and see how far I get.
In any case i think water cooling should be in my future.
Regarding linpack and/or prime use - I think there is a failure mechanism that we just haven't figured out yet.

[Chruschef]

What is the best radiator for hot i7? (set up is in signature block).
Planning my first water set up - single loop, gtz block with mcp655-B pump and ???radiator??? from frozenCPU - any of these?

there is no "best" radiator..
though, if you haven't pciked up a CPU block yet, get the Koolance 350 waterblock, it actually slightly outperforms the GTZ on i7.
MCP655-B pump is good, you just can't change the speed. makes it difficult to bleed with a bad reservoir .
.. If your using high speed fans go for high-fin count radiators.
.. If your using low speed fans go for medium-count radiators.(IE: med speed yate loons)

[SteveRo]

there is no "best" radiator..
though, if you haven't pciked up a CPU block yet, get the Koolance 350 waterblock, it actually slightly outperforms the GTZ on i7.
MCP655-B pump is good, you just can't change the speed. makes it difficult to bleed with a bad reservoir .
.. If your using high speed fans go for high-fin count radiators.
.. If your using low speed fans go for medium-count radiators.(IE: med speed yate loons)

Is there a link that compares the GTZ to the Koolance 350?

[jboys47]

I can attest that an i7 at 4.2ghz with HT at 1.36v load using a 2x120mm (Scythe fans at 1600rpm) with a GTZ dedicated for the cpu only is almost not enough.

I'm definitely going the quad fan rad route in the near future.

@reverendMaynard,

Are you using the provided waterblock on the North Bridge, or are you using anything additional? I just purchased the GTZ water block for the cpu but I'm not sure what to do about the north bridge. It seems like it should almost use its own loop because of the hose restrictions.

Thanks
Jim

[Ranger07]

ranger07 - What are your multi's at? -

21x200, seems to work best for me as it sets the ram to the correct speeds.

[eva2000]

eva - I think your later bios gets you the block size adjustment - time for me to upgrade that!
What block size are you using now?

128K is best didn't use a firmware/driver older than the latest so no idea if block size was selectable in previous firmwares heh

Its the same on the GA Extreme.

If only one core is enabled you get the x22 multi.

Good to know, shame can't get as high bclk as with 21x multi right now, maybe bios update will fix this heh.

[tjelaw]

I declared my 21x200 stable after 10hours of Prime.
HT on, 1.3875v on the CPU. Max temp was about 62C

So now Im working on 21x210.
I can boot / cpu-z validate / post this message at 1.425v on the CPU (with HT on), Idle at 32C


http://valid.canardpc.com/show_oc.php?id=474994

[ReverendMaynard]

@reverendMaynard,

Are you using the provided waterblock on the North Bridge, or are you using anything additional? I just purchased the GTZ water block for the cpu but I'm not sure what to do about the north bridge. It seems like it should almost use its own loop because of the hose restrictions.

Thanks
Jim

I am not using the provided nb block. On a 7/16 ID line that 1/4 would be a bit restrictive. Cpu only loop.

[Hot'n'Chilly]

I declared my 21x200 stable after 10hours of Prime.
HT on, 1.3875v on the CPU. Max temp was about 62C

So now Im working on 21x210.
I can boot / cpu-z validate / post this message at 1.425v on the CPU (with HT on), Idle at 32C

Whats your Max and Min temps in RealTemp 2.90 after a Prime test?

And whats the safe range for max temp on RealTemp? I got a reading of 78 max a minute ago at 4.025GHZ. Is that considered safe to use?

[Hot'n'Chilly]

Just ran a full test of RealTemp with Prime95 to heat test it. Heres the results at 3.8ghz now.

[tjelaw]

Whats your Max and Min temps in RealTemp 2.90 after a Prime test?

And whats the safe range for max temp on RealTemp? I got a reading of 78 max a minute ago at 4.025GHZ. Is that considered safe to use?

My max in RealTemp from Prime is 62C, with LinX it get to 70C.
A "safe" temp to use... I think you will get different answers to that. I guess its personal, I would run a system that would get 70C max on Prime for everyday use. But it depends on how long you are expecting your CPU to last. 1-2 years or 5+ years?

How much vcore are you using? 1.385v? what kind of cooling are you on?

[Hot'n'Chilly]

My max in RealTemp from Prime is 62C, with LinX it get to 70C.
A "safe" temp to use... I think you will get different answers to that. I guess its personal, I would run a system that would get 70C max on Prime for everyday use. But it depends on how long you are expecting your CPU to last. 1-2 years or 5+ years?

How much vcore are you using? 1.385v? what kind of cooling are you on?

I'm using 1.35v for the CPU Voltage @ 3.8ghz right now, using a Noctua air cooler. I'd like to be able to run this system for at least 3 years (even if I upgrade I tend to keep old PCs for back up duty). Am I running too hot for 3.8ghz, I notice that you are cooler at a higher clock... are you on water then?

[Xello]

I'm using 1.35v for the CPU Voltage @ 3.8ghz right now, using a Noctua air cooler. I'd like to be able to run this system for at least 3 years (even if I upgrade I tend to keep old PCs for back up duty). Am I running too hot for 3.8ghz, I notice that you are cooler at a higher clock... are you on water then?

They are according to their sig

You seem to have average to expected temps for air cooling @ 1.35v. It's the voltage that will determine your heat, more than the clock.

1.35v and 78c max prime load are nowhere near the worry zones, it will probably out live you

[Hot'n'Chilly]

Good to know, thats a relief. Are there other voltages you can drop to help lower temps? Such as RAM, PLL, etc etc?