Quad SLI GTX 980 loop

[TheIcedCanadian]

Hi,
I want to water cool a system with a 5960X and 4-way SLI GTX 980. Case is a 900D
I was wondering if these components would be good enough and the pump able to push all of the water through the system:

http://notes.io/XWe


Config would be top rad to CPU - CPU to res - res to bottom rad - bottom rad to VGA blocks - VGA blocks to res - res to top rad.

[SuperPug]

Config would be top rad to CPU - CPU to res - res to bottom rad - bottom rad to VGA blocks - VGA blocks to res - res to top rad.

 

What? Why is there a res in the middle of the loop? Why 2 res in a single loop? Thats absolutely pointless...

 

Go res > pump > waterblocks > rads > res.

 

Otherwise tubing is gonna be an absolute pain.

[Modzy]

I agree with superpug. A single res is more then enough for any PC unless your building a wild event case. Also agree in the order Superpug suggested. The res has to feed directly into the pump, then put all rads directly after cpu/gpus. this will removed the heat before it sits still in the res. This will help lower the over all loop temps. 

[TheIcedCanadian]

I agree with superpug. A single res is more then enough for any PC unless your building a wild event case. Also agree in the order Superpug suggested. The res has to feed directly into the pump, then put all rads directly after cpu/gpus. this will removed the heat before it sits still in the res. This will help lower the over all loop temps. 

 

 

What? Why is there a res in the middle of the loop? Why 2 res in a single loop? Thats absolutely pointless...

 

Go res > pump > waterblocks > rads > res.

 

Otherwise tubing is gonna be an absolute pain.

 

Will the temp be too much once the water gets to the 4th GPU?

[d33g33]

Posting a PCCG wishlist would have made that a lot easier , or even a screen grab from a cart.

 

ts been proven that the temp from the 'start' of the loop to the 'end' is minimal, a few degrees. it wont maker a difference.

 

Save yourself the cash as well and ditch the 4th GTX980. Its a a lot of money for very little gain.

[SuperPug]

Will the temp be too much once the water gets to the 4th GPU?

 

No. Theres only a minimal temperature gradient within a loop because the coolant flows very fast and doesnt get enough time to really heat up.

[TheIcedCanadian]

Posting a PCCG wishlist would have made that a lot easier , or even a screen grab from a cart.

 

ts been proven that the temp from the 'start' of the loop to the 'end' is minimal, a few degrees. it wont maker a difference.

 

Save yourself the cash as well and ditch the 4th GTX980. Its a a lot of money for very little gain.

 

 

No. Theres only a minimal temperature gradient within a loop because the coolant flows very fast and doesnt get enough time to really heat up.

OK - thanks. I will ditch the second rad in the middle.

Thanks for all the helps

[d33g33]

OK - thanks. I will ditch the second rad in the middle.

Thanks for all the helps

rad or res, no one suggested drop a rad.

[Modzy]

don't ditch rads, only have one water res that feeds directly into the pump. then just fill up each rad mounting spot in the case you can.

[Modzy]

Will the temp be too much once the water gets to the 4th GPU?

 

If you are limited for rad space, i'd suggest using a parallel config for the GPU loop. As serial will see the water get slightly hotter as it passes through each gpu. But I'm only talking about 5-10c.

For example:

GPU1= 35c, GPU2= 37c, GPU3= 40c, GPU4= 45c. Where as parallel would keep them equal & give you GPU1= 37c, GPU2= 37c, GPU3= 37c, GPU4= 37c. 

Parallel just requires high flow rate/higher pressure due to 4 way split the water is doing. Otherwise if you have a low pressure pump, that water might skip a GPU or flow much slower through 1 or 2 GPU and favour one channel over the others.

I would generally suggest looking at a 600-800 L/H (litres per hour) pump for parallel, and only a 400-600 L/H for serial setups. how ever 4 gpus + cpu even in serial might need a 600-800 in any config. 

here is a diagram explaining Serial vs Parallel GPU setups. 

If you are limit for rad space, try to stick to this guide or rule of thumb: 1x 120x30mm per GPU/CPU minimal. example 1xCPU + 4xGPU = 560x30mm minimal. Increasing the thickness to say 40mm would mean a 480x40mm would be around the minimal. But the more the better, up to a certain extent. You will start to get diminishing returns after too many radiators especially once you a water temp near ambient room temp.

Don't rag the paint skills. But this is simple loop config:

IF you are planning on overclocking both CPU's and GPU's i might suggest moving the 360 rad in between the CPU and GPU's in the loop. just so the used CPU water is cooled before it goes into GPUs.

example marked in orange dotted lines, exiting pump > CPU > 360 rad > GPUs. 

[Monty007]

Great advice from @Modzy!!  I personally have a 780 SLi with an sandwich rad setup in the bottom and a 360 on the top.  Link to the pics in my sig.  I'm running a parallel loop for my GPU's and the temps are within 5c of each other.  System is overclocked and I have no issues.  I'm running a single MCP655 pump on the number 4 setting and it keeps everything nice and cool.  

 

The rads I'm using: 1 - quad 480 (40mm)[bottom]; 1 - triple 360 (40mm) [bottom]; 1 - triple 360 (60mm) [top]