Core i7/X58 Overclocking Thread

[Xello]

i c on your pictures that you run a QPI voltage of 1.45V.

You know this could damage your cpu in time? Or you don't run this 24/7?

How long do you run on 2000MHz?

greetz

I'm running 1.45v QPI too, for now. There is no evidence that this will damage the cpu so far. Some people with older, higher voltage DDR3 have to set at least this to run their memory at stock speeds.

There are people running higher without issues..

http://www.xtremesystems.org/forums/...d.php?t=207972

[kazukun]

I continue using it in the present state till I am broken

[bmilos]

And you just keep that next to your computer? Is that just for your CPU? What kinda temps do you get with that running?

Very niccee

[rge]

that radbox is pretty sweet, next time I build I may try something like that...would definitely be better for cooling than my internal rad. As bmilos, would also like to know what temps you get and if one loop for cpu and gpu. Putting one of those in cracked window in winter, not a bad idea, or against a/c vent in summer. Looks like may be easier to work with/bleed etc with everything external as well.

[safan80]

I continue using it in the present state till I am broken

Sounds like a plan. I ran my qx9650 at 1.56 volts for 4.4Ghz for the longest time. I only stopped because heat dump into my room made me sweat like a pig.

[fornowagain]

that radbox is pretty sweet, next time I build I may try something like that...would definitely be better for cooling than my internal rad. As bmilos, would also like to know what temps you get and if one loop for cpu and gpu. Putting one of those in cracked window in winter, not a bad idea, or against a/c vent in summer. Looks like may be easier to work with/bleed etc with everything external as well.

Thats what I do, radbox is on the window shelf behind curtains with the window open a crack. Room stays warm and I get nice temps when its cold. This prime is with HT on, room's 20C and the air inlet to the radbox was around 7C. Loop temp around 11C and the realtemp idle around 15-20C.

[Astratuner]

I'm running 1.45v QPI too, for now. There is no evidence that this will damage the cpu so far. Some people with older, higher voltage DDR3 have to set at least this to run their memory at stock speeds.

There are people running higher without issues..

http://www.xtremesystems.org/forums/...d.php?t=207972

thanks for the info mate!

[speckled10]

An update on my results .. turn out I'm not so prime stable @ 1.4V with those posted settings .. crashes pretty consisently around 20 min mark ..

ACPI 2.0 On seems to buy me an extra 20 mins on top @ 40mins ..

DRAM to 1.68V & QPI to 1.35625V got me to 1hr 25mins prime @ 1.4V CPU (Auto had DRAM @ 1.8V !!) .. bumping QPI higher to 1.4V actaully had negative effect.. crashing in 5 mins prime ..

1.45V CPU (rest volts Auto) also does the trick .. gets me over an hour with prime .. but temps are off the chart again ..

[Chicken Patty]

this is my first time posting in this thread, here is a link to my results in another forum so that I dont have to re upload everything.

I'm using the components in my sig:


Wprime, super pi, and Generic CPU Bench
http://forums.techpowerup.com/showpo...&postcount=884

3dmark 06
http://forums.techpowerup.com/showpo...&postcount=891

3dmark vantage, score is really low, i dont know why, anybody have any suggestions
http://forums.techpowerup.com/showpo...&postcount=898

[kazukun]

3DMARK06
http://blue.ap.teacup.com/kazukun/img/1229747823.jpg
PCMARK05
http://blue.ap.teacup.com/kazukun/img/1229747848.jpg

[Chicken Patty]

3DMARK06
http://blue.ap.teacup.com/kazukun/img/1229747823.jpg
PCMARK05
http://blue.ap.teacup.com/kazukun/img/1229747848.jpg

awesome 3dmark run bro, what are you using to cool the CPU, decent idle temps you have there, pretty good actually.

[SteveRo]

High bclock versus low bclock for same mhz - This is a progress report.
Still trying to find the lowest vcore that can support prime stable 4ghz. Currently priming at 1.3250 vcore.
Results so far - it looks like lower vcore (and lower temps) can be had by going to high bclock/low multi.
Data follows - (FYI - linpack was telling me I had corrupted my vista install, currently priming with 32 bit xp).

[Classic Satch]

This is a progress report.
Still trying to find the lowest vcore that can support prime stable 4ghz. Currently priming at 1.3250 vcore.
Results so far - it looks like lower vcore (and lower temps) can be had by going to high bclock.
Data follows -

I've learned the same thing. My Bclk is 211 and multiplier 19 but I'm totally stable at 4.0Ghz with 1.36v. I'll continue to experiment but I still think that something's amiss with all of this. My chip seems to be darn good and I'll just have to find the "sweet spot".

[speckled10]

I've learned the same thing. My Bclk is 211 and multiplier 19 but I'm totally stable at 4.0Ghz with 1.36v. I'll continue to experiment but I still think that something's amiss with all of this. My chip seems to be darn good and I'll just have to find the "sweet spot".

Classic can you post us your full BIOS settings for that 211 x 19 setup ?

[Classic Satch]

Classic can you post us your full BIOS settings for that 211 x 19 setup ?

Bclk-211
CPU Multiplier-19
vcore-1.36
Vpll-1.86
vQPI-1.35

Overall settings are XMP for my Corsair RAM. Any other voltages are left at AUTO.

RAM is running at 1688Mhz(20 passes of Memtest stable).

HT is enabled but with the P6T, Turbo and Speedstep are automatically disabled when you change the CPU multiplier to any value other than the default 20.

What boggles my mind is if I set my CPU multiplier at Auto(20), it's almost impossible to achieve any sort of stability at 4.0Ghz. At 211x19, no problems whatsoever in any stress-testing or benchmarks.

My CPU is under H20 which pretty much eliminates any thermal throttling but the 20x multiplier quirk is very annoying.

[speckled10]

Bclk-211
CPU Multiplier-19
vcore-1.36
Vpll-1.86
vQPI-1.35

Overall settings are XMP for my Corsair RAM. Any other voltages are left at AUTO.

RAM is running at 1688Mhz(20 passes of Memtest stable).

HT is enabled but with the P6T, Turbo and Speedstep are automatically disabled when you change the CPU multiplier to any value other than the default 20.

What boggles my mind is if I set my CPU multiplier at Auto(20), it's almost impossible to achieve any sort of stability at 4.0Ghz. At 211x19, no problems whatsoever in any stress-testing or benchmarks.

My CPU is under H20 which pretty much eliminates any thermal throttling but the 20x multiplier quirk is very annoying.

What about Vdimm & things like LLC, CPU Amplitude, C-State, ACPI ?

ie. Anything else thats not ASUS P6T default settings ?

[SteveRo]

From week before last - my only 3dmark06 run so far -

[kazukun]

awesome 3dmark run bro, what are you using to cool the CPU, decent idle temps you have there, pretty good actually.

Prime 100% work
http://blue.ap.teacup.com/kazukun/img/1229638228.jpg
My Water Cooled PC
http://blue.ap.teacup.com/kazukun/
I'm sorry in a Japanese blog site
I am Japanese overCrocker

[rge]

High bclock versus low bclock for same mhz - This is a progress report.
Still trying to find the lowest vcore that can support prime stable 4ghz. Currently priming at 1.3250 vcore.
Results so far - it looks like lower vcore (and lower temps) can be had by going to high bclock/low multi.
Data follows - (FYI - linpack was telling me I had corrupted my vista install, currently priming with 32 bit xp).

Looks like i920, i940, and i965 all then can run with lower vcore for same mhz by using higher bclk with lower multi.

You guys are killing me with 3dmark scores. I still have single ultra...waiting for new stuff to come out from ati/nvidia in next month or so to buy x2 gpu, and upgrading monitor to 25.5 or 26 inch 1900x1200, cant do monitor til get better gpu. Any problem watercooling a x2 gpu? My pcmark is 20k by running at 4.4 and doing the dpi shrink, My system is 16,800K if run straight as is.

[SteveRo]

rge - let us know what you get for a monitor - I am also thinking about getting a new monitor - surely it can't be age - its got to be the monitor!

[ReverendMaynard]

Looks like i920, i940, and i965 all then can run with lower vcore for same mhz by using higher bclk with lower multi.

You guys are killing me with 3dmark scores. I still have single ultra...waiting for new stuff to come out from ati/nvidia in next month or so to buy x2 gpu, and upgrading monitor to 25.5 or 26 inch 1900x1200, cant do monitor til get better gpu. Any problem watercooling a x2 gpu? My pcmark is 20k by running at 4.4 and doing the dpi shrink, My system is 16,800K if run straight as is.

Dude...I'm on a single 8800GT

I might break and pick up a couple 216 SSC's today.

[rge]

LOL...I just keep seeing these awesome 26 inch widescreens with much better view of all action on some games...I want one, but my single ultra won't handle the increase in resolution for many games. Need a x2gpu, but want to wait for new offerings.

[Chicken Patty]

Prime 100% work
http://blue.ap.teacup.com/kazukun/img/1229638228.jpg
My Water Cooled PC
http://blue.ap.teacup.com/kazukun/
I'm sorry in a Japanese blog site
I am Japanese overCrocker

Thank you.

That is a big radiator. you have to cool the CPU and the IOH!!!! but the temperatures are good so no problem

[dejanh]

An update on my results .. turn out I'm not so prime stable @ 1.4V with those posted settings .. crashes pretty consisently around 20 min mark ..

ACPI 2.0 On seems to buy me an extra 20 mins on top @ 40mins ..

DRAM to 1.68V & QPI to 1.35625V got me to 1hr 25mins prime @ 1.4V CPU (Auto had DRAM @ 1.8V !!) .. bumping QPI higher to 1.4V actaully had negative effect.. crashing in 5 mins prime ..

1.45V CPU (rest volts Auto) also does the trick .. gets me over an hour with prime .. but temps are off the chart again ..

Interesting you posted this. I found too that with lower QPI/VTT voltage I end up being more stable. I do not run my QPI/VTT past 1.39V now even for 4.14GHz OC...

I think high QPI/VTT produces too much heat and unless you are cooling with water or better it becomes unstable very quickly, but I am just speculating on the cooling. I do know that high QPI/VTT really pushes the heat.

[SteveRo]

Looks like high bclock is better for oc than high multi.
I can get the same 4ghz prime stable with 0.0875v less vcore by using 191x21 vs. 134x30.
Temps are also reduced from 75 to 66C!
Data follows, (config is in my signature) -