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Planning a Watercooled Silverstone FT03 with Quadfire 7990's

post #1 of 10
Thread Starter 
Yes, you read that correctly. Question is - is this possible?

I've always liked the idea of having a monstrosity of a machine in a small housing. There's more elegance to it I feel.

The FT03 is probably the only slick-looking mATX case I think could handle these kind of components (any other suggestions are welcome). I've already invested in one 7990, as you can see:




But I have not bought in any other components just yet, though that will soon change over the coming weeks. The inspiration came from HackJoe's water cooled FT03 mod which is pretty famous for it's clean look, although there's only a single Titan in his. I'm planning a similar loop to what he currently has:




Thing is, I'm not even sure if it'll work going for the second 7990 (I bought the first one for dirt cheap at £400 on sale). I recently found another potential 7990 for £400 I may jump on, but I'm on the fence if it'll work with only a dual 80mm rad at the bottom and a 120mm rad at the top. Having the cards air-cooled certainly won't work because they'll probably fry themselves.

I've thrown together a rough diagram of what the loop/build will look like:



As far as I can tell both cards should fit just fine in the case, each using two slots and the plentiful length space underneath where 7990's will sit. One problem I've noticed however is the PSU limitation, the FT03 can only handle PSU's up to 180mm in length. I had planned on getting a Corsair AX1200i to power these beasts, but that comes in at 200m in length, so I could do with 180mm 1000W+ PSU recommendations here as well (if they even exist).

So before I drop for another 7990, I'm looking for opinions/suggestions/advice as to whether Quad-firing in a FT03 has any potential pitfalls I'm missing? Loop/watercooling suggestions are also welcome.
Edited by RoronoaZoro - 1/15/14 at 7:29am
post #2 of 10
general rule is 120mm of rad per cpu or gpu. 7990 x2 = 480 rad, cpu = 120 rad for a minimum of 600mm of rad

Here's a ft03 with a 400mm strapped to the back
http://www.overclock.net/t/1328565/a-b-c-arniebombas-backpack-case
Edited by Donkey1514 - 1/15/14 at 4:20am
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post #3 of 10

the Antec HCP-1000 Platinum is an awesome power supply according to reviews  but what elce you trying to power man

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post #4 of 10
Yeah that's not enough radiator for all that heat and that's without even adding the second 7990. I've read that a single 7990 can use up to 389 watts -> lot's of heat to get rid of and the radiators you chose will not be able to cool even one card by itself (so without the cpu in the loop)

If you want to stick with that case you'll have to add another radiator externaly to keep the heat down.

EDIT: Ok, you might be able to cool one card with the rads, barely.
Edited by Eddie Smurphy - 1/15/14 at 4:37am
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post #5 of 10
You can use the case for your build, but you'd need to use an external radiator mount for heat dissipation. You could do this via bulkhead-mount QDCs to make your life easier.
post #6 of 10
Why would you want to house quadfire 7990s (essentially OCTAfire since each one's already a dual gpu card) in such a tiny case? Even if you could cool all of the components somehow, wouldn't it be extremely crammed looking? I only have a dualfire setup but still went for the 900D. Anyway, good luck on cooling all that inside of THAT thumb.gif
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post #7 of 10
Quote:
Originally Posted by Valice View Post

Why would you want to house quadfire 7990s (essentially OCTAfire since each one's already a dual gpu card) in such a tiny case? Even if you could cool all of the components somehow, wouldn't it be extremely crammed looking? I only have a dualfire setup but still went for the 900D. Anyway, good luck on cooling all that inside of THAT thumb.gif

dual 7990's is considred quad fire since it's essentially 4x 7970's....... doh.gif
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post #8 of 10
Thread Starter 
Thanks for the reply guys, very useful.
Quote:
Originally Posted by Donkey1514 View Post

Here's a ft03 with a 400mm strapped to the back
http://www.overclock.net/t/1328565/a-b-c-arniebombas-backpack-case

I saw this build a while back, and certainly helped solidifying some ideas slightly better now that I've seen it again.
Quote:
Originally Posted by Eddie Smurphy View Post

Ok, you might be able to cool one card with the rads, barely.
Quote:
Originally Posted by Electrocutor View Post

You can use the case for your build, but you'd need to use an external radiator mount for heat dissipation. You could do this via bulkhead-mount QDCs to make your life easier.
Quote:
Originally Posted by Donkey1514 View Post

general rule is 120mm of rad per cpu or gpu. 7990 x2 = 480 rad, cpu = 120 rad for a minimum of 600mm of rad

Going by the general consensus, seems like my suspicions were right; two 7990's is too difficult to cool with my current WC plan without going external, which I'd preferably like to avoid. I'm thinking it's maybe better to focus on cooling one 7990 for now, and plan for the second at a later stage once I'm comfortable with the case. Going by some quick calculations, I'm sure a dual 80mm and a single 120mm rad should be enough for the CPU and GPU (I hope anyway) considering:

80mm² * 2 = 12800mm²
120mm² = 14400mm²

Just by the surface area of the radiator (though it's not the only factor), the 120mm wins slightly, but giving just under 200mm² less rad space compared to having two 120mm single rads. There'll be more fans and more noise, sure, but it does tuck in nicely next to the PSU. smile.gif

I've also just noticed it may be possible to fit up to a 160mm single rad (or 140mm in this case seeing as 160mm single rads don't exist afaik) standing upright against the left side panel in place of the dual 80mm. I'd have to drill a side grill at the side of the case for the fan exhaust, but I can't say for sure if it'll work without seeing the case myself. However this will probably remove any clearance potential for a second 7990.
Edited by RoronoaZoro - 1/15/14 at 7:27am
post #9 of 10
Quote:
Originally Posted by RoronoaZoro View Post

I've also just noticed it may be possible to fit up to a 160mm single rad (or 140mm in this case seeing as 160mm single rads don't exist afaik) standing upright against the left side panel in place of the dual 80mm. I'd have to drill a side grill at the side of the case for the fan exhaust, but I can't say for sure if it'll work without seeing the case myself. However this will probably remove any clearance potential for a second 7990.

I'd say get a bigger radiator in there and chuck the second 7990 idea. Cooling two of those rather hot cards with that small amount of radiator will not work well. One 7990 will be enough power for some time thumb.gif

As for being enough rad for two GPU's and one CPU (7990 and let's say 150 watts for a cpu with small oc?), that would be 539 watts of heat to be removed. With the rads you posted in the beginning I don't think that would work out well. If it were possible then the fans would have to be very loud.
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post #10 of 10
Thread Starter 
Quote:
Originally Posted by Eddie Smurphy View Post

I'd say get a bigger radiator in there and chuck the second 7990 idea. Cooling two of those rather hot cards with that small amount of radiator will not work well. One 7990 will be enough power for some time thumb.gif

As for being enough rad for two GPU's and one CPU (7990 and let's say 150 watts for a cpu with small oc?), that would be 539 watts of heat to be removed. With the rads you posted in the beginning I don't think that would work out well. If it were possible then the fans would have to be very loud.

Agreed. Either engineer new ways to fit additional rads, or bump up fan count/speed (which I'm leaning against). I think a single 7990 will suffice for all intents and purposes. This also relaxes the PSU problem I mentioned earlier; an AX860/i should do fine in the case of a single card. All I have to do next is decide on the watercooling components (which shouldn't take long) and plan out the remainder of my case mods. biggrin.gif
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