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Old 08-26-04, 02:21 AM   #1
zakelwe
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Default Chilled water cooling on FX 5800

My bog stock FX 5800 would do 500/1050 on air and reached temps of 45-60C with the side of the case off. The original heatsink was expoxy'd onto the integrated heat spreader above the chip. The RAM also got very hot, much more so to the touch than the gpu heatsink IMO, probably because of lesser air flow.

Anyhow I put my chilled glycol / methanol water chiller on yesterday. This uses an old Dangerden Maze gpu cooler with a copper block stuck on it. The inlet temp was <-25C and the outlet temp about -20C.

Using the driver diplay temp measurement the temp was recorded at 0C which I guess means it does not go below 0C. After a 3dmark run it peaked at 3C before quickly dropping back down to 0C again. Nothing major on the overclock .. 13Mhz up at 513, needs more volts I guess.

Anyhow nice temps for a rather cheap water cooling system on what is fiarly well known for being a fairly hot chip.

Regards

Andy
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Old 08-26-04, 11:23 AM   #2
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Default Re: Chilled water cooling on FX 5800

And I thought my 5800 3D temp was good at (ambient + 2C). You win.

Have you found anything aside from the stock RAMsinks able to cool the DDR-II RAMs? I'm not into making custom blocks, but I want to cool the RAMs on my 5800 and 5800Us.
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Old 08-26-04, 06:22 PM   #3
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Default Re: Chilled water cooling on FX 5800

That's interesting...
So certainly your overclock wasn't limited by heat (!). I agree that it would seem to be asking for more voltage- I wonder if the 5800U has a different voltage regulation circuit as many users have gotten 550MHZ or so with only factory air cooling...
Try using RivaTuner and see if the Core Voltage rises to 6V during 3D operation: Here is an Ultra graphed showing the rise in CoreV from 4 to 6- I wonder does the non-ultra do the same?

Last edited by quik_2_win; 08-26-04 at 06:34 PM.
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Old 08-27-04, 06:50 AM   #4
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Default Re: Chilled water cooling on FX 5800

In regards to RAM sinks that is a good point, I actually removed my front two because they got in the way of the waterblock, but i had an mobile air con unit blowing over it all ( it's my benhcing rig so I can take liberties this way ), not sure if anything is going to be that good apart from good air cooling blowing over the whole thing.

I think the graph above is 1.4 in Windows going to 1.6v for 3d apps, that would be normal I guess. The gpu volt controller is an ISL component and has two fb pin outs, I think FB1 is the one to go for.

Regards

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Old 08-27-04, 10:29 AM   #5
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Default Re: Chilled water cooling on FX 5800

Are those artifacts on the screenshot?
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Old 08-27-04, 04:55 PM   #6
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Default Re: Chilled water cooling on FX 5800

The artifact is from compression- I need to adjust my ADOBE, just been too lazy...
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Old 08-28-04, 11:55 AM   #7
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Default Re: Chilled water cooling on FX 5800

How do you have the water chilled? I have a water setup but have yet to find a descent cheap chilling system to use.
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Old 08-28-04, 03:51 PM   #8
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Default Re: Chilled water cooling on FX 5800

Quote:
Originally Posted by zakelwe
My bog stock FX 5800 would do 500/1050 on air and reached temps of 45-60C with the side of the case off. The original heatsink was expoxy'd onto the integrated heat spreader above the chip. The RAM also got very hot, much more so to the touch than the gpu heatsink IMO, probably because of lesser air flow.

Anyhow I put my chilled glycol / methanol water chiller on yesterday. This uses an old Dangerden Maze gpu cooler with a copper block stuck on it. The inlet temp was <-25C and the outlet temp about -20C.

Using the driver diplay temp measurement the temp was recorded at 0C which I guess means it does not go below 0C. After a 3dmark run it peaked at 3C before quickly dropping back down to 0C again. Nothing major on the overclock .. 13Mhz up at 513, needs more volts I guess.

Anyhow nice temps for a rather cheap water cooling system on what is fiarly well known for being a fairly hot chip.

Regards

Andy
you can flash it to an ultra to get the extra volts needed
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Old 10-06-04, 04:17 PM   #9
zakelwe
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Default Re: Chilled water cooling on FX 5800

Finally got the screen grab off my benching rig ...



Shame it does not go below zero

So much for a dustbuster eh ?

Regards

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Old 10-06-04, 04:21 PM   #10
zakelwe
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Default Re: Chilled water cooling on FX 5800

Quote:
Originally Posted by Nandro
How do you have the water chilled? I have a water setup but have yet to find a descent cheap chilling system to use.


The freezer in the background



Note the 5800 is air cooled this time and still managed a good 3dmark 2001 score as the cooling swapped to the cpu to let me go to 2750Mhz.

Regards

Andy
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Old 10-06-04, 07:03 PM   #11
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Default Re: Chilled water cooling on FX 5800

Dang
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Old 10-22-04, 08:26 AM   #12
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Default Re: Chilled water cooling on FX 5800

Cool, lets see some benchmarks!!
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