We here in Team NexGen are at Nexgen Consulting trying to break the world record right now, with (hopefully) a bit of help from koolance, and some LN2 or LHe4. We have a P5B deluxe, 631 cedarmill (ES), and 2 X 512MB Micron D9GKX Memory modules. So far we have hit 5.5ghz no problem but beyond 1.4v Vcore Air, water, and even our Prometeia Capped out under the heat load generated by the P4 631. But 4ghz at 1v was pretty cool. The use of Liquid Nitrogen is our best bet at breaking the 8179.89 MHz INTEL Pentium 4 631 (Cedar Mill) world record and bringing the title back to the good ole U.S.A.
Current World Record Held by "ThuG OC Team Italy"

New World Record Celeron D 355


Team NexGen Takes 2nd Place in Celeron D 331 Overclocking


Team NexGen 8GHz Project LN2 Overclocking


Team NexGen Liquid Nitrogen Bench Station


Custom Built Phase cooling Rig


LN2 runs w/ Rev 1 LN2 CPU Container, ASUS P5B Deluxe, Pentium 4 631 (ES), 2GB Micron D9GKX, Koolance 200W Chipset Water cooling.


QX6700 on LN2 at PDXLAN 9


Dry Ice Overclocking W/ P4 631 (ES), Koolance NB,SB, Vreg WaterBlocks, and Koolance 1200W Liquid cooled PSU


Three of five IHS removals for this project.


Water cooled test bench: Koolance CPU 330, CHC 120, and Vreg blocks w/ Koolance 1200W Liquid cooled PSU


Check out our Video on You Tube, Team NexGen 8GHz Project Part 1

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

After Testing our P5B, P4 631 (ES), and Micron D9GKX overclocks on Stock cooling we decided to move to our next phase of air cooling with a Zalman 9500 Cu and get some higher overclocks. The Zalman was an incredible jump in cooling performance compared to stock but not near enough to handle the voltage of a 5GHZ overclock. We than moved to our watercooling setup, a koolance RP1000, CPU 305 Block, and Black Ice Extreme II. The block had a far greater cooling capacity than we expected. The liquid cooling solution was very valuable to us in our water testing phase and allowed us to determine that with any cooling solution we were experiencing a 40-50C temperature differential between the IHS and Die temp when above 1.45v Vcore. We were able to determine that the removal of the IHS was needed for the Engineering Sample at hand. We ran LN2 on the 631before and after the IHS removal. Testing 1.0v - 1.7v we have determined that the removal of the IHS greatly reduced the Delta T we were experiencing.

We were able to achieve 7GHZ at 1.6Vcore while testing our 1st 631ES on LN2, before we could test any higher clocks we had a condensation issue that eventually killed the CPU and Mobo halting any testing until we could find replacement hardware.
We spent the next week developing a solution to combat condensation and freeze lock. we came to a conclusion that required several key modifications to our project designs.
1. The redesign of our LN2 pot.
2. Use of a sealant to protect all vital areas of the board.
3. Increase of distance between the mounting bracket and the motherboard.
4. The use of precision cut insulation pads around the base of the LN2 pot, socket, and the back of the motherboard.
5. The use of a Koolance motherboard Hydrapack to regulate temperatures on the back of the board and prevent motherboard "Freeze lock"
6. Cooling of the Vregs on the top and bottom of the motherboard to reduce Vdroop.

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

Vmods:
50K Potentiometer on ASUS 680I

50K potentiometer on ASUS P5B Deluxe

50K potentiometer on ASUS P5B Deluxe

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

Celeron D 355
ASUS P5B-Deluxe
Corsair Dominator 8500C4 1x 1024MB
ASUS 6600 PCI-e GFX card
Koolance watercooling on Vregs,NB,SB

Just finished Vcore and Vdroop mod on the P5B deluxe, and made a few DI runs
here are the results

Intel Celeron D 355 @ 5333.25 MHz 1.74Vcore (Dry Ice)

CPU-Z Validator Database
THE OVERCLOCKING WORLD RECORD DATABASE

Intel Celeron D 355 @ 5399.73 MHz 1.82Vcore (Dry Ice)

CPU-Z Validator Database
THE OVERCLOCKING WORLD RECORD DATABASE

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

Pics of the OC setup




Two 50K OHM Potentiometers for Vcore and VDroop mod, by Team NexGen

Masking tape used to seal CPU socket around IHS, Pink Foam used for insulation to prevent condensation on the CPU and Near by components.
Koolance water cooled Vregs and North Bridge, on ASUS P5B Deluxe

NexGen Rev. 2.5 Copper Liquid Nitrogen and Dry Ice Container, with Koolance CPU 330 Mounting Bracket.

Carbon Dioxide gas fuming from the copper container during Overclocking runs.

Bubbling mixture of 99% alcohol and crushed Dry Ice.

UEI DT200 Showing temperature of -109F in Copper Dry Ice container

CPUZ of Intel Celeron 355 1.2V core, -49C Overclocked to 3750MHz

Using SetFSB to Overclock our ASUS P5B Deluxe

Full view of Dry Ice Overclocking platform.

Bottom of copper Container.

Masking tape used to "water proof" the motherboard, with Foam layered on top to prevent condensation.

Blue masking tape, around and under CPU socket.

Closer view of tape used around and under the LGA 775 CPU socket.

Bottom of Motherboard "water proofed" with Blue masking tape.

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

Got another Dry Ice run, this time with the Celeron 331, with the phase unit we could only hit 5150MHZ

Intel Celeron 331 @ 5706.7 MHz @ 1.84Vcore Cooled w/ Dry Ice, using the NexGen rev 2.5 Cu LN2 Pot

http://valid.x86-secret.com/show_oc.php?id=192220

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

1st Dry ice run with a Celeron 365

Celeron 365 @ 5904.03 MHz 1.7Vcore -35c

http://valid.x86-secret.com/show_oc.php?id=193081

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

Big Thanks goes out to Voyager for donating the P4 631 for testing.


We finally got our hands on a 631 that can clock beyond 320MHz FSB
in my first round of testing I used our Single Stage R290 Phase unit.

We will be moving to Dry Ice Runs some time today, we hope to have some LN2 next week to make a run for 7GHz

Test Rig:
Mountain Mods Twice 7 Case
NexGen SS R290 Phase Cooler
Koolance 1200W Liquid Cooled PSU
ASUS Commando
ASUS 6600GT
Corsair 1X512MB 6400C4
Western Digital 320KS 16MB Cache

here are the results:
6199.87 MHz P4 631 @ 1.7V
413.32MHz FSB @ 1.5V
826.6MHz RAM @ 2.0V
NB Temp 26c
SB Temp 29c
CPU Temp -15c



CPU-Z Validator Database

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

Our initial Dry Ice runs have been exciting to say the least... for the first hour we were unable to break 5700MHz @ -55c but after a little tweaking we managed 6420MHz @ -40c 1.775Vcore

We couldnt keep the system stable enough for a valadation past 6300MHz
This validation puts us 1 away from the top 10

its 4AM and im going to take a nap b4 our next run.


CPU-Z Validator Database

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168

New CPU, Insulation, Dry Ice, and a good ole NexGen Vmod


Testing new foam for Copper Dry Ice container.

Replaced Pink foam with new laminated white foam. and wrapped a white rag around the top of the CPU block to absorb any escaping Acetone.

Top view of Team NexGen Rev 2.5 Copper Liquid Nitrogen, Dry ice container with Koolance CPU 330 Mounting Bracket

Side View of container with Vcore Vmod on the left corner of the board.

Molded insulation for Koolance CPU 330 mounting Bracket

Cutting out the shape of the bracket for insulation.

Insulation used around CPU socket to prevent Condensation.

P4 631 with Acetone present on CPU contact pads.

Acetone on board and around CPU socket due to over flowing mixture of Dry Ice and Acetone.

__________________
"If It Don't Overclock Its Broken"

Folding@Home Team NexGen #54168