5GHZ+ 32M with I7 965, REX2 and SS Phase

[Oldscarface]

After a lot of testing, like almost everyone here, I have managed to bench beyond the 5GHZ barrier @ Superpi 1m and Superpi 32m using a Single Stage Phase Change.

Specs :
- Asus Rampage 2 Extreme
- Triple (3x1GB) Corsair 1866 CL9
- Intel I7 965 XE ES (Batch 3831A460)
- PCI Voodoo Banshee 16MB Card
- 200 GB Harddisk Seagate STAT2
- 1000 Watt PC Power & Cooling
- Cooled : Single Stange Phase stange
- 2 Modded A/C in cascade.

Some pics of the setup :










This was not easy I can tell you, it seems that when you are around the 5GHZ, some strange things happens and you system is not booting into windows at all. Everytime you run agains some kind of wall.
The trick is to find the right combination between bclcks/uclcks/QPI/Multiplier and memory speed combined with the right voltages. What I have managed up till now is :

Superpi 1M : 8,093 sec @ 5075 MHZ



Please note : This was just to see how high it got, the eff. is not good I know. It is a old install with no tweaks and a almost dead harddisk

Superpi 32M : 7min 33sec 625msec @ 5005 MHz.
I have already bench @ 5040 MHZ, but @ loop 23 it rebooted :-(.



Also here : This was just to see how high it got and not about the eff.


Next steps :
It seems that there is more, because as you can see the difference between Superpi 1M and Superpi 32M is almost nothing.
So, first I will start to get a clean install on a new harddisk and try to go higher.
When I have some more info I will post them here and share it with you.

[jugeen]

Well done m8!

[Rol-Co]

Thats the way to go m8 ...more more ...

coming after you with mine.

[MidgetMariachi]

Damn... 5GHz!!!! Congratulations! I hope to get close to that one day

Midget Mariachi

[massman]

I'm impressed by your overclocking skills more and more each time you show your results . 5GHz without LN2 is just massive.

[Achill3uS]

outstanding achievement on SS, looking fwd to see more from you with i7 mate

[proxis]

what kind of temps were you running?

[Oldscarface]

what kind of temps were you running?

The temps of the cpu I do not know, because the Asus Rampage 2 Extreme has also problems with the temps sensors.
But the temp of the evap was -35 degrees (measured with a thermometer).

[[XC] gomeler]

Now that's hilarious. Core i7 only needs Single-stage temps to get close to it's maximum average frequency

[RPGWiZaRD]

Now that's hilarious. Core i7 only needs Single-stage temps to get close to it's maximum average frequency

It kinda sux tho, no benefit for LN2 users, these aint temp/voltage limited, more like design limited for extreme overclocking and the wall comes suprisingly soon too sometimes. This wall you'd push far away with Core 2 on LN2 but with i7 it just doesn't work. Nice chip for air/water/SS users tho.

[jcool]

Now THAT is what I want to see, hell yeah
SS here as well, hoping for 4,8Ghz 24/7, or close. Tell me what you'll settle for a stable setting when you do, will ya

[TheKarmakazi]

very nice work!! 5ghz on SS

higher uncore clk should help with 32M efficiency

[Buckeye]

Now that's hilarious. Core i7 only needs Single-stage temps to get close to it's maximum average frequency

Yes I can't wait to put mine under my Jinu SS Phase.

Seeing as it is holding a 4.8ghz QX9770 at -40c. Keep in mind that this QX9770 was 43c with a stock intel HS and stock settings, it should be good to go with a Core i7 965.

[ZoLKoRn]

Nice work m8, congrats for 5Ghz

looking forward to 3dbench next round go go go...!

[Oliver]

thanks for posting

very good read with alot of good information in short sentences

really looking forward to more

keep pushing it

[Sgrios]

Very interesting read, thanks.
People already pushing the i7 to the limits.

[shoopdawoopa]

were did you get those 1866 corsair ram sticks?

[Slovnaft]

NICE work brother, 5ghz benchable is nothing to sneeze at, and it looks like you had some decent eff. on that 32M run.

were did you get those 1866 corsair ram sticks?

QFT i wanna know, my kingston 2000's are SO delayed.

[SAE]

Wow... nice clocking - seems to be a great chip, too.

[Oldscarface]

Thanks all

Now THAT is what I want to see, hell yeah
SS here as well, hoping for 4,8Ghz 24/7, or close. Tell me what you'll settle for a stable setting when you do, will ya

I'am able to boot @ 4800+MHZ with 8 cores and do some single threated benchmarks like Superpi 1m, 32m and pifast.
But no way that I can do Multi threated benchmarks like Wprime, Cinebench 10 en 3DMark06 and Vantage. The Single Stage can not handle the temps.
During the 3DMark Vantage CPU test the EVAP temp is changes from -36 degrees till -17 degrees.
With 4 cores you can have a stable system with a decent / good cpu like mine . What we already have found out is that every cpu has some kind off sweetpoints. With a sweetpoint we mean the right combination between the bclcks/uclcks/qpi/memory etc and all the voltages.
Also it seems that oneven multipliers are much better than even multipliers.
One of the following (or even all) multiplier (27/29/31/33/35) are good for almost every cpu. For mine 29, 31 and 35 are the best from the list.
Around these multipliers you have to find the right clcks and voltages.
Next week I will post some difference bios settings. But I'am now to busy with other things.

very nice work!! 5ghz on SS

higher uncore clk should help with 32M efficiency

Yes I know , but this was just to see how high he could go.
Also next week I will try to make a desent Superpi 32m with this baby

Nice work m8, congrats for 5Ghz

looking forward to 3dbench next round go go go...!

I have already tested some benchmarks, but most off mine time was to find out how everything works with the nehalem systems.
This week or next week I will post some results.

were did you get those 1866 corsair ram sticks?

These memory are coming direct from Corsair and will be used in a contest we have this weekend agains Sweden and Finland (Kinc and Sampa etc) in the battle of the North

[jcool]

Thanks all



I'am able to boot @ 4800+MHZ with 8 cores and do some single threated benchmarks like Superpi 1m, 32m and pifast.
But no way that I can do Multi threated benchmarks like Wprime, Cinebench 10 en 3DMark06 and Vantage. The Single Stage can not handle the temps.
During the 3DMark Vantage CPU test the EVAP temp is changes from -36 degrees till -17 degrees.
With 4 cores you can have a stable system with a decent / good cpu like mine . What we already have found out is that every cpu has some kind off sweetpoints. With a sweetpoint we mean the right combination between the bclcks/uclcks/qpi/memory etc and all the voltages.
Also it seems that oneven multipliers are much better than even multipliers.
One of the following (or even all) multiplier (27/29/31/33/35) are good for almost every cpu. For mine 29, 31 and 35 are the best from the list.
Around these multipliers you have to find the right clcks and voltages.
Next week I will post some difference bios settings. But I'am now to busy with other things.

Thanks for the elaborate reply.
One more question: For what loads is your SS tuned?
Mine is optimized for high loads (holds 260W at -28C, peak ~280W but doesn't go below -30C even with 150W loaded).

[SoF]

wow these are really some great resutls on single stage - too bad it doesn't scale with more cold. but good to see my old Mach I, not used for 1year+ now, maybe good for some action next year maybe

[MarcusFoX]

Ok a 3d banchee... wow man thats goin way back to the quake 2 and kingpin days.... godanm I havent looked at mine in awhile... I gotta go dig it up.

[makaka]

what is your evaporator temp under load ?, nice result my freind .