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Old March 24, 2009, 04:26 PM
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Default Huge EVGA Fail!!!! GTX 295 Hydro "copper" mixes ALU and CU in the same BLOCK!

Fudzilla

Unbelievable!

I can't even fathom the depth of their stupidity on this move. They're going to have to recall this product!
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Old March 24, 2009, 04:30 PM
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Galvanic corrosion is grossly egagerated.

Edit: It's actually zero with non-conductive coolant.
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Old March 24, 2009, 04:33 PM
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It isnt THAT bad...As long as you use a good coolant it should be fine. Look at most koolance kits or dare I say thermaltake/coolermaster. They will go years without issues, and I bet that will be longer than anyone would own this card anyway....
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Old March 24, 2009, 04:34 PM
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Quote:
Originally Posted by Squeetard View Post
Galvanic corrosion is grossly egagerated.
Could be, but we're dealing with fairly fine "tines" that wouldn't take too much to damage, and I've seen some pretty convincing images of corroded block internals over the years.

Even if it wouldn't be much of an issue, I doubt many WC folks would jump at the chance to test it out.
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Old March 24, 2009, 04:35 PM
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Quote:
Originally Posted by Squeetard View Post
Galvanic corrosion is grossly egagerated.

Edit: It's actually zero with non-conductive coolant.
Quote:
Originally Posted by Cptn Vortex View Post
It isnt THAT bad...As long as you use a good coolant it should be fine. Look at most koolance kits or dare I say thermaltake/coolermaster. They will go years without issues, and I bet that will be longer than anyone would own this card anyway....
Do either of you run mixed metals in your loop?

These are also touching in the same block. Have you seen the pics of the Apogee GTX with ALU top?
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Old March 24, 2009, 04:44 PM
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I've got a giant aluminum car rad in my copper loop. Ran it for a year on water. Zero corrosion. I'm running non-conductive feser fluid now, so there will be zero.

Differing metals have a galvanic potential, without something to conduct that their will be no transfer.
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Old March 24, 2009, 04:58 PM
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Quote:
Originally Posted by Squeetard View Post
I've got a giant aluminum car rad in my copper loop. Ran it for a year on water. Zero corrosion. I'm running non-conductive feser fluid now, so there will be zero.

Differing metals have a galvanic potential, without something to conduct that their will be no transfer.
I've seen too many horror stories and pictures. No mixing of aluminum and copper for me, thanks.
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Old March 24, 2009, 05:11 PM
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Quote:
Originally Posted by Squeetard View Post
I've got a giant aluminum car rad in my copper loop. Ran it for a year on water. Zero corrosion. I'm running non-conductive feser fluid now, so there will be zero.

Differing metals have a galvanic potential, without something to conduct that their will
be no transfer.
Yes, but in your case, the aluminum was remotely located. In this case, the two metals are in direct contact, so there will be conduction. Without anti-corrosives, this thing is an RMA waiting to happen. And seriously, it's not like there's a shortage of alternative materials available, Acetal/Delrin and Acrylic being two very obvious options.
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Old March 24, 2009, 05:38 PM
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Did the reviewer even pick it up?

Actually, in one of the pics you can actually see some corrosion starting.
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Old March 24, 2009, 05:48 PM
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A lot of barbs are differing metals than the Material THey are touching as well, Chrome Barbs on Aluminum Rads.
Heck even those with Brass Rads and GTZ Blocks have two different metals mixing (remember Brass is an Alloy so not pure Copper). Brass including Swiftech, Koolance, Faser etc..
So long as the Coolant is the right mixture of additives you should be fine.
THe LYtron Chillers At my Work have Massive Aluminum Rads with Copper Fittings and Copper/Brass BLocks on the Components attached. They Run Pure water with tiny additives and not once have they failed due to Corrosion.
It all depends on what coolant is used, and what metals are in direct contact.

My thoughts at least,
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