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$20 sub-ambient cooling!! - Page 2

post #11 of 35
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Quote:
awesome. i'd totally do this but i'm afraid of condensation.
I wasnt prepared for it and got lucky it didnt kill my system. there was a LOT of water around the cpu on the bottom of the coldplate, as well as on the retention bracket too.

I would for sure insulate when/if you do it.
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post #12 of 35
Great Results, with those CPU temps I would think you could easily do a 5ghz SuperPi 1m Pass.
    
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post #13 of 35
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Quote:
Great Results, with those CPU temps I would think you could easily do a 5ghz SuperPi 1m Pass.
I think so too, but I would need some 2250Mhz GTX2's for a fast run too!
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post #14 of 35
I was thinking salt into the ice water, but it could probably screw it up, but nice results! I would push the CPU clock more close to 5ghz though.
My SuperPi is at 51s LOL! 1M
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post #15 of 35
Should have salted your ice water.
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post #16 of 35
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Quote:
Should have salted your ice water.
wouldnt have mattered because the RAM was unstable past 1700 and super pi and IBT wouldnt run.

The cpu had a lot more in it. I was also worried about the salt ruining the pump as well from corrosion.
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post #17 of 35
You don't have to use salt to lower the freezing point. Any ionic solute will do. However, you have to add an awful lot to get any real drop in your temperature. I would try copper sulphate, sold in bulk at hardware stores as 'stump killer'.
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post #18 of 35
Why not stick the rad in the bucket with some dice? It's not expensive at all and will give you much lower temperatures. Be sure to insulate this, though.
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post #19 of 35
Thread Starter 
Quote:
You don't have to use salt to lower the freezing point. Any ionic solute will do. However, you have to add an awful lot to get any real drop in your temperature. I would try copper sulphate, sold in bulk at hardware stores as 'stump killer'.
alright thanks for the tip...ill look into that....

Quote:
Why not stick the rad in the bucket with some dice? It's not expensive at all and will give you much lower temperatures. Be sure to insulate this, though.
its easier to just drop the pump in the bucket and call it a day.
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post #20 of 35
Nice job!

If you ever try putting the rad into the bucket, here are a few more ideas that might just enhance the cooling:

1. submerge a longer length of the tubes into the water to increase the heat exchange surface area/length

2. use a picnic cooler to reduce heat loss

3. pre-frozening: this step involves more work but has a high potential to return a longer and greater cooling power. You put the whole bucket (or picnic cooler) with water into the freezer, with the rad and tubings submerged inside. After it is all frozen, take the whole assembly and reconnect to do your test. Of course, you will need to have QDCs.

4. lower the freezing point: add salt to the water. This will lower the freezing point, thus increase the cooling power. To prevent salt water coming into contact with the rad, put the rad and the tubings into a plastic bag before submerging them into the bucket.
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