How much rad for a GTX690?

TeeJayHoward

TeeJayHoward

Limpness Supreme
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Recall reading online somewhere once that you want 1mm of fan for each W TDP that a device draws. Is this still true? If I wanted to cool 2x GTX690s (300W TDP each), would it be possible with a 2x120mm and a 3x120mm radiator?
 
I thought the rule of thumb was 120mm per GPU and cpu? So that loop should be enough for that setup.
 
Awesome! How does something like this look? Any reasons it wouldn't work?
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(Hrm, forgot the fans. Assume that there are 5x1000RPM 120mm fans on the outside of the case, connected to the radiators.)
 
thats actually kind of over kill. you can just go with 1x 360 black ice gtx with some delta's and you will be fine. if anything add a cpu block to that and you will be set.
 
Valanr said:
thats actually kind of over kill. you can just go with 1x 360 black ice gtx with some delta's and you will be fine. if anything add a cpu block to that and you will be set.
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I'm watercooling so that noise levels drop. Certainly not going to put Deltas on there! :)

And a single 360 rad for 4xGPUs? Is Kepler really THAT low a heat output?
 
TeeJayHoward said:
And a single 360 rad for 4xGPUs? Is Kepler really THAT low a heat output?
Click to expand...


I highly doubt it.

If you don't mind going external and have a little space you could always pick up a phoyba 1080. It looks nice in the box and isn't really that expensive.
 
What you have in the MS paint drawing should handle it fine. You could probably even add your CPU to the loop and be good.
 
Jorona said:
What you have in the MS paint drawing should handle it fine. You could probably even add your CPU to the loop and be good.
Click to expand...

Yea, a nice 360mm rad like the RX360, and a RX240 would cool both cards, and your cpu with an overclock, all while staying quiet.The RX series have a really low FPI count so you can get great cooling with very low speed fans..
 
Ended up picking up a single GTX690, a NexXxoS XT45 360, and a Swiftech Apogee Drive II waterblock/pump combo. Here's hoping that the 1x120mm per CPU/GPU works out. I'm trying to cool 2xGPUs and 1xCPU off a single 360 radiator with 800-1000RPM fans! Depending on the performance, a second 690 may end up in the box. If so, I'll add the 240. Unfortunately, the RX series of radiators are too tall to fit in my case. Hopefully a 10FPI 45mm copper one will work!
 
It should work, but the question is how well?

Let us know how it works out, and also what your fan configuration is going to be.
 
you should be fine with a 360 rad for a 690 and cpu. it'll cool fine, but don't expect 35 degree loaded temps across the board.
 
unreal89 said:
It should work, but the question is how well?

Let us know how it works out, and also what your fan configuration is going to be.
Click to expand...
My plan is to have two Corsair Air Series AF120 Quiet Edition High Airflow 120mm fans on the front of the case blowing inwards, and one more on the "exhaust" side of the case, flipped to blow inwards, for a grand total of 3x40CFM fans at 21dB being used as intakes. The radiator will be mounted on the top of the case as seen in the picture. Depending on available space, I may have three Corsair Air Series SP120 Quiet Edition High Static Pressure 120mm fans (37CFM, 23dB) as "push" fans blowing from the inside of the case through the radiator, venting to atmo. I also have at my disposal 3x Scythe Slipstream 120 800RPM fans (40CFM, 10dB... Yeah right.) which I can add to the case as "pull" fans, sitting on top of the case. However, if the radiator placement does not allow for the "push" fans to fit, I may end up moving them to the "pull" location instead. I'll be comparing noise levels and temperatures between the High Static Pressure fans and the Slipstreams. My goal is to have a quiet high-end gaming rig. If, at 4.5GHz, I'm getting load temperatures of 70*C, I'm okay with it - It's still within the normal operating parameters of the chip, and better than what the stock HS/F does at stock clocks!
 
TeeJayHoward said:
My plan is to have two Corsair Air Series AF120 Quiet Edition High Airflow 120mm fans on the front of the case blowing inwards, and one more on the "exhaust" side of the case, flipped to blow inwards, for a grand total of 3x40CFM fans at 21dB being used as intakes. The radiator will be mounted on the top of the case as seen in the picture. Depending on available space, I may have three Corsair Air Series SP120 Quiet Edition High Static Pressure 120mm fans (37CFM, 23dB) as "push" fans blowing from the inside of the case through the radiator, venting to atmo. I also have at my disposal 3x Scythe Slipstream 120 800RPM fans (40CFM, 10dB... Yeah right.) which I can add to the case as "pull" fans, sitting on top of the case. However, if the radiator placement does not allow for the "push" fans to fit, I may end up moving them to the "pull" location instead. I'll be comparing noise levels and temperatures between the High Static Pressure fans and the Slipstreams. My goal is to have a quiet high-end gaming rig. If, at 4.5GHz, I'm getting load temperatures of 70*C, I'm okay with it - It's still within the normal operating parameters of the chip, and better than what the stock HS/F does at stock clocks!
Click to expand...

Personally, I would run the front two 120s as intake, and mount the 3x120 on the top of the radiator pushing cool air down into the box. Mount the rear 120 as the only exhaust...

This is how my setup is currently, and I found that it works better then pushing already semi warm air from the inside of the case through the radiator and out the top..

The second benefit is that you will have a positive pressure setup, which will help keep dust to a minimum, and the cool air that is being pushed down from the top rad will help keep your motherboard VRMs and RAM nice and cool..Remember they are designed to get air circulated around them from the cpu fan, and it's important to have some air around them IMHO..

*EDIT*

I would strongly advise against mixing different fans on the same radiator..If you are going to do push/pull, then pick up 3 more of the fans you decide to use. I could see that causing some serious issues since I highly doubt they will have the same airflow, and more importantly, Static Pressure.

*EDIT 2*

I see that you bought one of those Apogee™ Drive II cpu block/pump combos..They are far from my favorite, but I personally feel this is even more of a reason to have the top 120s pushing cool air down so it will circulate around the pump, and then exit right out the back 120mm fan..Is there any particular reason you decided to use a combo block/pump? They don't save you any money, and personally I would have went with a MCP 655B, which is a stronger pump, and a decent block, something like the DT Sniper, which is a MUCH less restrictive block..If you can change the order, I would seriously urge you to.
 
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ccityinstaller said:
I see that you bought one of those Apogee™ Drive II cpu block/pump combos..They are far from my favorite, but I personally feel this is even more of a reason to have the top 120s pushing cool air down so it will circulate around the pump, and then exit right out the back 120mm fan..Is there any particular reason you decided to use a combo block/pump? They don't save you any money, and personally I would have went with a MCP 655B, which is a stronger pump, and a decent block, something like the DT Sniper, which is a MUCH less restrictive block..If you can change the order, I would seriously urge you to.
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It wouldn't cost me anything but time to flip the fans so that they're pumping air in. The whole positive pressure thing you're mentioning? I dig it. As for the combo block/pump, I chose it for aesthetics and space constrictions. There's not a lot of room for me to put a traditional pump, and I like the simple all-in-one look. Is 270GPH not enough flow for a simple two or three block loop? While I'm asking questions, is 1/2" ID tubing really necessary? I see it used a lot on some of the builds around here, but when I look at boxes on, for example, MDPC, they're using the smaller 3/8" ID tubing.
 
unreal89 said:
It should work, but the question is how well?

Let us know how it works out, and also what your fan configuration is going to be.
Click to expand...

nuttcase21 said:
you should be fine with a 360 rad for a 690 and cpu. it'll cool fine, but don't expect 35 degree loaded temps across the board.
Click to expand...

So, how well did it work? 49*C in FurMark's 15 minute benchmark. I'm happy with the result. Going to be replacing it with an AquaComputer 3x120mm, 60mm thick radiator/pump/res combo soon-ish.
FurMark_H2O.png
 
TeeJayHoward said:
So, how well did it work? 49*C in FurMark's 15 minute benchmark. I'm happy with the result. Going to be replacing it with an AquaComputer 3x120mm, 60mm thick radiator/pump/res combo soon-ish.
FurMark_H2O.png
Click to expand...

If you are getting pretty good temperatures now, then why rip it all out and replace it? If you want to lower your temperatures more, just add the second 240mm radiator you were considering in the first place. The ST block/pump isn't bad, I just don't like how it combines 2 crucial parts in one, and it is doesn't really save you any money vs a regular pump and block. What matters is that you are happy with it!;)
 
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