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Heater core overkill: My celeron suicide log.

post #1 of 9
Thread Starter 
Until I piece together my sandy bridge rig, I've decided to pin mod a socket 478 2.5ghz celeron northwood to 1.7v vcore, and overclock it via setfsb in a dell motherboard.

I'm cooling it via a lapped EK Supreme HF CPU block, and a modded '77 Bonneville heater core, along with a modded mcp350. I'll be updating this log as I finish piecing together my loop and go about the project.
__________________________________________________ _______________

Part 1: The Cpu Block
I picked up an Ek Supreme HF Rev 1 Gold Plate for $40

I spent 3 hours lapping it, and this was the result:

Note: I did not go after a mirror finish, as it's just not worth it to me.
Also, lapped copper tarnishes quickly. The base is already covered in tarnish even though I lapped it yesterday.
__________________________________________________ _______________

Part 2: The Fans
I bought 2 Gentle Typhoon AP-31 5400rpm fans from performance-pcs. They were lavishly packaged, and came sleeved for free with black (I think paracord) sleeving on the molex cables.
They're loud, but a lot quiter than expected. I would give pics of the fans, but they're already mounted on my heater core. Here is a picture of the box from google images:


I also soldered a pwm wire to each fan, combined the 2 pwms and rpms into 1 wire each, and soldered the wires to a 3 pin plug. The fans are powered by molex, and will eventually be controlled via the pwm wire. The 3 pin plug will plug into a 4 pin fan header, and the pwm and rpm wires will line up perfectly.
__________________________________________________ ________________

Part 3: The Heater Core
Napa sells the core for ~$25. I made a sheet metal shroud that bolts together, attached my fans and grilles, and used electrical tape to seal the shroud to the heater core. The fans push air through the core.




Edited by gregory121295 - 8/12/11 at 10:13pm
post #2 of 9
Did you lap it with the block fully assembled or with it taken apart?

If you lapped it with it assembled to remove the bow from the block, you may have actually hurt its performance...
Grog
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post #3 of 9
Thread Starter 
I lapped it with the block disassembled.
post #4 of 9
With the s775 chips BSEL mods are a godsend for Dell's. I overclocked both an E2160 and E4400 with the BSEL mod. And actually the guys over at www.bios-mods.com are unlocking bioses over there including HP, Dell, etc.
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post #5 of 9
Thread Starter 
This is a socket 478 celeron, not 775. I will look into the custom bios, although last I checked, my mobo didn't have a custom bios.
post #6 of 9
Quote:
Originally Posted by gregory121295 View Post
This is a socket 478 celeron, not 775. I will look into the custom bios, although last I checked, my mobo didn't have a custom bios.
I know its s478, I was just saying the s775's have that option. s478 could only do voltage pin mods to my knowledge.
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post #7 of 9
Thread Starter 
That's the plan. I'm gonna oc this chip until it dies. How high do you think I can go? My loop should be able to handle at least ~400 watts of heat and keep the proccesor at ~55 celsius.
post #8 of 9
Quote:
Originally Posted by gregory121295 View Post
That's the plan. I'm gonna oc this chip until it dies. How high do you think I can go? My loop should be able to handle at least ~400 watts of heat and keep the proccesor at ~55 celsius.
Your motherboard will limit you before your chip will. ~3Ghz I'd guess would be near the limit on that board until you vmod it or bring the temps down on the chipset. But you don't know until you try.
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Intel Xeon X5675 @ 4.6Ghz Asus Sabertooth X58 AMD Radeon R9 Fury Corsair XMS DDR3  
Hard DriveHard DriveHard DriveOptical Drive
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post #9 of 9
Thread Starter 
I'm vmodding it to 1.7v. Hopefully I don't encounter sudden-northwood-death-syndrome.
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