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EK-FC88 causes corrosion?

post #1 of 11
Thread Starter 
I want to add the block to my loop, but im afraid it might cause corrosion. Look at what Jab-Tech writes:

Quote:
High performance VGA water block for GeForce 8800 GT series graphic cards. Base is made of electrolytic copper. Top is made of quality acrylic glass. The sealing is preformed by quality rubber washer. Aluminium part is made for cooling the mosfets of 8800 GT series. Block is mounted with enclosed M2,5 screws.
http://www.jab-tech.com/product.php?productid=4037
post #2 of 11
The parts which actually contact the fluid are all copper or acrylic, that will do just fine! It's actually a really nice waterblock!
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Red Venom
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post #3 of 11
Thread Starter 
Thanks for the info!
Can anybody confirm this?
post #4 of 11
Look at the picture, assuming no leaks past the thick o-ring, the only parts touching the coolant are the copper and acrylic top. The aluminum on the side only touches the copper and acrylic, not the coolant. They won't corrode unless there is some conductor of ions between the two (electricity, water, etc.)
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post #5 of 11
The black aluminum part that covers the mosfets does not come in contact with any water, so you should be good.
post #6 of 11
Yes, the aluminum piece attaches to the copper via a few screws and never comes in contact with the water. In fact, the waterblock can remain sealed up while you attach the aluminum part.
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post #7 of 11
Thread Starter 
Thanks
reps for all of you.
Im buying this block right now
post #8 of 11
Yeah, I've handled the block for some testing. EK knows better than to use aluminum in the contact area. It's a nice looking block!
    
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post #9 of 11
Thread Starter 
Thanks Martin!
Any idea on how much my temps will increase on the CPU?
post #10 of 11
Quote:
Originally Posted by Refresh View Post
Thanks Martin!
Any idea on how much my temps will increase on the CPU?
Depends on the radiator and fans used.

Here is a tool I created a while back that I pulled from circulation because I got tired of people nitpicking it to death. It's not an exact measurement, more of a rule of thumb than anything and is only based on a 10C water/ambient delta so things tend to fall apart after you get away from that range. What it does is pull the 10C based c/w results from the Thermochill PA series rads, you enter the heat in watts and flow rate and it returns water to core delta. It also take in an assumend ambient temperature and estimates a water temperature.

With a PA120.3 and nexus fans, a 120 watt load would be around 3.8C water to core delta.

The 8800 can draw as much as 170 watts, but I don't think it dumps nearly that much. Assuming 80% heat dump, that would be about an addition 140 watts or 8.2C

Net change would be 8.2-3.8 = 4.4C.

So around 4 to 5C for the added heat using a PA120.3 and nexus fans. Using higher speed fans would result in less, or using a smaller radiator would result in more gain in temp.

I've seen people note 4 degree changes, so it's probably not too far off. Probably not likely that you'll load up both the CPU and GPU 100% together though, so in the end it could be a little less.

But as you can experiment with, putting some stronger fans can really offset that... Switching from the nexus fans at 12V to Panaflos at 12V almost eliminates the coolant heat gain.

Hope that helps..
    
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