E6850 + P5K Deluxe + LN2

[youngpro]

Afternoon all,

Today Andy (tuchan) and I endeavoured on our first LN2 experience. This is the first time I've played with LN2 so it was a steep learning curve, but very fun. We had 20L on LN2 and it lasted 4 hours, didn't even get a chance to change CPUs for the qx6700 :(

We started lowering the kayl pot down to boot temperature of -50, in bios we were reading -20 and took it down from there. To start with it went down way too far, -115 in bios and then we got temp freeze. A bit of water added and we were on our way. We were able to establish best temps were between -105 and -90 reading on my multimetre which was around -110 to -95 cpu core temperature, below that and we would get hard lock from coldbug.

The only problem we had all day was losing all our benching data on the i-ram and this means we lost data for pifast and aquamark.

Andy proved himself a master at balancing the LN2 and this came into play during 32MB pi where we had to keep within 10 degrees to avoid hard lock

http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0364.jpg

http://i200.photobucket.com/albums/aa50/preeeezy/DSC00043.jpg


The benching rig was:

* E6850 L720
* Asus P5K Deluxe (vcore modded, unused)
* Cellshock PC8000 C4
* OCZ GameXStream 700W
* WD 40GB IDE
* ECS 8800GTS 320mb
* Gigabyte I-Ram w/ 2gb generic DDR400
* Pioneer DVD
* Kayl tube + 20L ln2

I determined the max FSB to start with and this was a disappointment, I was able to get 565mhz on dice, and only 575mhz was available on LN2. This chip is walled by FSB so I was hoping possibly 600mhz under cold, but that was not to be. Now we knew our FSB wall we could move forward and push towards benches.



First we attacked PI 1mb, its been my dream for a long time to go sub 10s with this bench and today was the day.

Frequency: 570.3 * 9 = 5133mhz
Ram: 570mhz 4-4-4-4
Vcore: v1.55
Benching on i-ram drive,

Result was a nice 9.875s, this is a great result for us and I shaved almost 0.4s off my best 1MB time.

http://i200.photobucket.com/albums/aa50/preeeezy/DSC00053.jpg


Next it was modpi 32mb, my favourite bench, and again the results were nice.

Frequency: 565 * 9 = 5085mhz
Ram: 565mhz 4-4-4-4
Vcore: v1.575
Benching on i-ram drive,

Result in this case was 9m 53.437s, this time KILLS my best 32mb pi time by nearly 20s and seems to be a fairly efficient run. This was done with maxmem 512, pagefile 48-96mb, copy-waza 750mb and benching on i-ram. I'm very happy with this result as its been the bane of my overclocking existence to go sub 10m for some time now.

As mentioned before we also did aquamark and pifast but lost this data.

http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0372.jpg


PIFast:

Frequency: 570.3 * 9 = 5133mhz
Ram: 570.3mhz 4-4-4-4
Vcore: v1.575
Benching on i-ram drive,

Time: 18.34s , only 0.01s off equaling the best pifast time for e6850.



CPU-Z:

Frequency: 570.3 * 9 = 5133mhz
Ram: 570.3mhz 4-4-4-4
Vcore: v1.55
Benching on i-ram drive,

We were able to get as high as 5175mhz but we have no proof (because of corrupt data) so I'll stick with 5133mhz as highest validation.



Aquamark 03:

Frequency: 567 * 9 = 5101mhz
Ram: 567mhz 4-4-4-4
Vcore: v1.575
8800 @ 700mhz core, 1025mhz memory
Benching on i-ram drive,

Result: 254302


It was unfortunate to lose validations for these benchs but we can do them again next time, in all a VERY fun day and I'll certainly be doing it again. Plenty of pictures included of our adventure today.

dewar
http://i200.photobucket.com/albums/aa50/preeeezy/DSC00038.jpg

dewar
http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0379.jpg

kayl ln2 tube
http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0378.jpg

http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0376.jpg

http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0373.jpg

http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0370.jpg

http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0365.jpg

tuchan filling up the tube
http://i200.photobucket.com/albums/aa50/preeeezy/DSCN0363.jpg

http://i200.photobucket.com/albums/aa50/preeeezy/DSC00065.jpg

http://i200.photobucket.com/albums/aa50/preeeezy/DSC00040.jpg

e6850 @ 5ghz boot
http://i200.photobucket.com/albums/aa50/preeeezy/DSC00041.jpg

[ent]

Conrats on your first Ln2 attempt. :clap: 5.1GHz is a nice achievement! IMO next time use just regular HDD, you will not have any problems with IRAM and IRAM probally is very useful only for PCMark benching :D

[Solarfall]

great scores and nice pics. i just love seeing this kind of stuff..:up:

[Zannema]

Great result, next time it convene to you to use a VGA PCI card, E-ram and copywaza tweak for SuperPI !:up:

However still compliments for the first run with LN2:clap:

[Nosfer@tu]

very nice first run guys :D
Dident think about the trix with wather :D

Also somtimes there is a better OC with PCI-E contra PCI!

[dinos22]

nice going boys

Team i4memory.com at it again :D :clap:

[SF3D]

Nice results!

Another E6850 chip with fsb wall ~570-575MHz :(

[youngpro]

thanks everyone,

yeah it was definatly a mistake using the i-ram as a bootdrive, in the end it was probably because i was lazy and didnt do a fresh install on ide and just use the i-ram for pi 32mb runs... i wont make that mistake again,

to be honest i usually use a pci fx5500 card for pi benching but because were doing aquamark i left the 8800gts in there.. next time i have a go with this chip ill definatly use a pci card,

thanks for your support, hopefully this first time is the hardest and it just gets easier from here ;)

[charlie]

looks fun. Those 6850's are nice.

[jugeen]

n1 job! :clap: