Core i7/X58 Overclocking Thread

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01-13-2009, 12:18 PM
ReverendMaynard

Quote:

Originally Posted by Bobbylite

IMO these chips require a harmony of voltages not just jacking 1 or 2 of them through the roof.
Try playing around with the qpi pll and other voltages a bit. Sometimes a bump on one of those helps.

I agree completely. The cookie cutter overclocks of the E8600 era are over.
01-13-2009, 01:15 PM
jcool

I just toyed with Vcore and VTT so far.. and ofc the various mults - no need to raise any of the other voltages for me. Unless raising QPI PLL decreases Vcore/VTT needed or something. Might try that when I got the time (probably next month or so -.-)
01-13-2009, 01:17 PM
SteveRo

3 Attachment(s)

I installed water over the weekend - I was able to put together a very nice loop with much help from the folks on this forum.
Much thanks to all those that helped!
WC system added - ST355 with XSPC top, ST GTZ, Feser 480 with 4x ultra kaze
Initial indications are temps ~15C lower vs high end air cooling (noctua U12P with 2 fans push/pull).
Pics and initial run at 4.4 (HT off) to follow -
01-13-2009, 01:21 PM
Leeghoofd

SteveRO can you test plz 20 X 200 with HT on ? Which temps do you get with the GTZ block ? With my I920 at 1.42Vcore (HT on , turbo off) I get around 74 max ( with the fans at 7v ) after a 2 hour small FFT session... The True after one hour was already in the high 80's
01-13-2009, 01:29 PM
SteveRo

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Quote:

Originally Posted by Leeghoofd

SteveRO can you test plz 20 X 200 with HT on ? Which temps do you get with the GTZ block ? With my I920 at 1.42Vcore (HT on , turbo off) I get around 74 max ( with the fans at 7v ) after a 2 hour small FFT session... The True after one hour was already in the high 80's

I have had very bad luck with anything x20, i seem to have much better luck with x21 - prior to water - results to date below. I am currently priming at 4.43 (HT off) - max temp to date (with water) is only 68C (when running x4 fans) and this with running 1.55 vcore exclusively.
01-13-2009, 01:57 PM
Splave

any reason you mounted the block in that way? great temps for 1.55vcore
01-13-2009, 02:26 PM
SteveRo

Quote:

Originally Posted by Bobbylite

any reason you mounted the block in that way? great temps for 1.55vcore

Did I mount it wrong? I thought I was following the directions that came with the block.
01-13-2009, 02:51 PM
jcool

HT off is easy :D
Try with HT on, that one's really evil. I can prime at 4,4 with around 1,5V and HT enabled.. I doubt it can be done on water unless its chilled. I get into positive temps as well there.
01-13-2009, 02:57 PM
SteveRo

I might be able to get prime stable 4.2 ht on but I doubt 4.4 ht on will happen - although I am still tinkering!
I am going to try some x23 settings next.
01-13-2009, 03:39 PM
Chicken Patty

Quote:

Originally Posted by SteveRo

I might be able to get prime stable 4.2 ht on but I doubt 4.4 ht on will happen - although I am still tinkering!
I am going to try some x23 settings next.

what voltage does it take you for 4.2 GHz stabel with HT on?
01-13-2009, 03:41 PM
Utnorris

I am doing 4.2Ghz with 1.40v vcore. 200x19 with turbo mode and HT turned on. CPUID validation is in my sig.
01-13-2009, 03:46 PM
Chicken Patty

Quote:

Originally Posted by Utnorris

I am doing 4.2Ghz with 1.40v vcore. 200x19 with turbo mode and HT turned on. CPUID validation is in my sig.

Thanks.

It takes me about 1.43v to do 4.2 GHz stable.

right now I am expirementing with HT off and 1.43v stable at 4.3Ghz. At this point though, every little increase needs a bump in voltage, starting to reach the CPU's max.
01-13-2009, 04:09 PM
SteveRo

Quote:

Originally Posted by Chicken Patty

what voltage does it take you for 4.2 GHz stabel with HT on?

I don't have 4.2 ht on prime stable yet - I do have 2.5 hrs prime - 4.2 ht on but that is not near long enough - because my water set up allows me - I have been running all oc attempts at 1.55 vcore - max temp so far 69C.
01-13-2009, 04:19 PM
Chicken Patty

^^^thanks.! :up:
01-13-2009, 04:41 PM
liftedcj7on44s

Ok i see you guys are running you uncore at 16x. How????

all i see is qpi link(slow or fastest) and then uncore ratio which goes up to 24x. If i set it to 16x my board fails to post.
01-13-2009, 05:02 PM
Splave

Quote:

Originally Posted by SteveRo

Did I mount it wrong? I thought I was following the directions that came with the block.

With the temps you are getting Im thinking about changing mine :rofl:
01-13-2009, 05:42 PM
Hot'n'Chilly

Quote:

Originally Posted by Hot'n'Chilly

I'm not even sure how its possible one can reach 4.0ghz with less than 1.4v. Mine doesn't seem to be able to... maybe it is the preportions of your other clocks and voltages.

Could those of you with 920's hitting 4.0ghz with relatively low voltages please post up your exact settings and voltages as well as what board and RAM you are using. I am going to make a study of this.

Hey guys, thanks to everybody who has posted in their settings and voltages so far. I have decided, however, to move this experiment to it's own thread as to not interfere with this one... so please check the new thread "The i7 Overclocking Study Thread" which will be posted up in a couple minutes here. There you can all dump your data on me without getting it lost in a sea of other posts.
01-13-2009, 05:46 PM
jcool

Just try to find out which mults your 920 likes. Usually 19 or 21 are the best (meaning it takes less voltage for more mhz), and usually it hates the 20x. My 940 does 4Ghz at 1,304V linpack stable (meaning prime would probably pass at even less) using the 21x or 23x mult. Using the 22x it needs 1,4V too --> even mults usually suck for i7.
01-13-2009, 06:09 PM
Hot'n'Chilly

That is one of the things I will of course look into, but I have to believe that it goes deeper than just multi's. Perhaps multi to BLCK ratio or some other preportion along with RAM or QPI... who knows, but woth enough data we can start to sort through and rule things out.

Anyway heres the thread link, so those of you with low voltage OC's please post in and help the cause, so to speak.

http://www.xtremesystems.org/forums/...d.php?t=214437
01-13-2009, 06:13 PM
Chicken Patty

Quote:

Originally Posted by Hot'n'Chilly

That is one of the things I will of course look into, but I have to believe that it goes deeper than just multi's. Perhaps multi to BLCK ratio or some other preportion along with RAM or QPI... who knows, but woth enough data we can start to sort through and rule things out.

Anyway heres the thread link, so those of you with low voltage OC's please post in and help the cause, so to speak.

http://www.xtremesystems.org/forums/...d.php?t=214437

I went ahead and posted there.
01-13-2009, 06:17 PM
ReverendMaynard

Quote:

Originally Posted by Chicken Patty

I went ahead and posted there.

saw that, but none of your cpu vcore's settings jive with your screen shot. 1.5v for 200x21?
01-13-2009, 06:19 PM
Chicken Patty

Quote:

Originally Posted by ReverendMaynard

saw that, but none of your cpu vcore's settings jive with your screen shot. 1.5v for 200x21?

wrong screenshot, that was the first time I ever booted at 4.2 GHz, i dropped it to 1.35v which is 1.411v in windows. I fixed the image.
01-13-2009, 06:20 PM
liftedcj7on44s

i just made a post showing what i just accomplished. i will post all settings once i stabalize it.
01-13-2009, 06:24 PM
Chicken Patty

Quote:

Originally Posted by liftedcj7on44s

i just made a post showing what i just accomplished. i will post all settings once i stabalize it.

what thread?
01-13-2009, 06:26 PM
Chicken Patty

http://img.techpowerup.org/090113/392.jpg

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