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G-relk

Watercooling GPU's and CPU

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So, I want to re-build my gaming PC sometime soon with a new CPU and motherboard. The plan is to put it in a new case, and update the water cooling loop to get my GPU's wet so I can overclock them a bit.

 

Being only relatively new to water-cooling (and overcloking GPU's for that matter), I need to know what sort of radiator space I would need. I already have an XSPC EX120 and RS240, will they be enough?? If not, I was thinking of keeping the EX120, and swapping the RS240 out for either an EX or RX 360.

 

The other thing I am not sure about is the XSPC pump/res I have. It's this one FWIW. I was thinking of swapping it out for a Liang DDC and just have a seperate res. Getting rid of my current XSPC pump also means I can re-sell the XSPC WC kit I am using ATM to fund this venture.

 

I have already decided to use the XSPC Razor full cover waterblocks for my two 6950's, and I will swap out my XSPC Rasa CPU block for a Raystorm (mainly so I can re-sell my original kit as stated earlier). I'll continue to use 1/2" barbs with 7/16" tube, plus the coolant I have in my current loop.

 

In summary, what I propose is:

 

XSPC EX 120 rad

XSPC RX360 rad

XSPC Razor full cover 6970 waterblock x 2

XSPC Raystorm CPU waterblock

Liang DDC pump (with a mod top)

plus barbs, hose etc

 

Hardware will be:

 

i5-2500K

Asrock Extreme7 Gen3

8GB Corsair vengeance

2 x 6950 2GB

Fractal Design Define XL (which I will mod to accommodate the WC)

 

 

So, have I guessed right and chosen good enough parts to make a really sweet loop??

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cant say how much rad space you need without knowing what fans you intend to use so we have some idea of what noise\performance level you are trying to hit

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cant say how much rad space you need without knowing what fans you intend to use so we have some idea of what noise\performance level you are trying to hit

I currently have a pair of these:

 

http://www.pccasegear.com/index.php?main_p...oducts_id=16491

 

I have set the motherboard to restrict voltage to them depending on CPU temperature. When not gaming, they are not overly noisy, so I will get another one or two as needed.

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a 140.3 rad will do fine. if you can fit it.

 

the EX series of radiators are ment to be very good, slimer profile with the performance of the RX series. your list is pretty spot on.

 

as for tubing id recomend primoflex. or gammods has a pre bundled pack which is similar in quality to primofelx and includes a tubing cutter.

there are some cheaper compression fitting by xspc as gammods atm which ive found to be very decent.

 

off topic, but what do you think of that motherboard, PM me please.

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i'll chime in here too, since I am basically wondering a similar thing. will be ditching my 5770s within a few weeks now and will be drowning the new cards pretty much once I get em. Only want to drain it all once and do it right :P

 

Now, I have a 140.3 rad and my load temps on CPU still sometimes hit 60 (ambient in that room is more often than not, at least 30*c as there are other sources of heat too (reptiles mostly). Adding one or two GPUs to this, I was wondering if the temperature would get too hot.

 

My question is basically, should I also be measuring the temperature of the water somehow? If the CPU is @ 60*c the water might still be at 30 who knows.. temps may not even increase with the addition of GPUs.

My second question is how to do this with the pump running? :P Or should I do it seconds after power off?

 

Not trying to hijack your thread G-relk, maybe this info will help you too.

Edited by p0is(+)n

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just stick a temp probe on the rad end tank where the water inlet\outlet is

if flow rates are good there should be less than 1c difference between the two then keep an eye on it under load

~3c under load is awesome but 5-7c over ambient is more likely with decent airflow and rads

if the water is ~10c or more above ambient imo its worth looking at more rad space or faster fans i guess it comes down to how low you want tempts to be

Edited by Dasa

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a 140.3 rad will do fine. if you can fit it.

 

the EX series of radiators are ment to be very good, slimer profile with the performance of the RX series. your list is pretty spot on.

 

as for tubing id recomend primoflex. or gammods has a pre bundled pack which is similar in quality to primofelx and includes a tubing cutter.

there are some cheaper compression fitting by xspc as gammods atm which ive found to be very decent.

 

off topic, but what do you think of that motherboard, PM me please.

If the EX rads are that good, I will probably go with one of those. Less weight is always a bonus IMO (not to mention it is a fair bit cheaper). I don't have the case yet, so I am unsure whether a 140.3 rad will fit. Where as I know the 120.3 will fit, as I have seen mods done with them and they look great.

 

Fittings wise I prefer to use barbs. less risk of anything going wrong, especially since I am using 1/2" barbs and 7/16" tubing. I have the primoflex stuff atm, and I am heaps impressed with it. It's really nice and supple, looks great, and bends way better than the cheap shit that came with my Rasa kit.

 

PM incoming about the motherboard :)

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oh yea just a heads up, a 140.3 rad has more surface area than a 120.4 so you wont need any extra radiators. ;)

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oh yea just a heads up, a 140.3 rad has more surface area than a 120.4 so you wont need any extra radiators. ;)

Fair enough, but I already own the EX120, so I may as well use it :P

 

Spose I could always have a 140.3 plus the 120.1 ;) Either way, I really have to wait for the new case to arrive so I can measure it up.

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Another thing: Will the layout of the loop effect the performance much?? I was thinking of having it go:

 

Pump/res --> GPU --> GPU --> 360/420 rad --> CPU --> 120 rad --> pump/res

 

But I don't know how I will go getting all the hoses in without it looking too shit......

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My current setup is a 360 XSPC mounted on at the top of the case and a 240 Swiftech hanging off the rear for the CPU with a 240 XSPC at the bottom of the case for both GPU's.

 

Seems to work well enough but there are some random times that the GPU's will get towards 80c at 100% usage but at other times of 100% usage they will be fine.

 

The lesson i learned is:

 

Rads need a good amount of air flow / Fermi GPU's get bloody hot!

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my loop with two gtx480 and a 2600k on a single 4x120 rad with 46-57cfm 1440-1850rpm gentle typhoon fans typically keeps the gpu's under 40c and the cpu under 50c when at 4.3ghz

gpu can jump up 10c and cpu a extra 20c when i crank up the v to try squeeze out the last few mhz though

 

edit a bit more detail

 

2600k@4.3GHz 1.26v - P67-UD4 - 2x4g 1600 8-9-8 - SLI-GTX480 800MHz 1068mv - WD Black 1TB Samsung 2tb - Corsair TX750 - CM Stacker STC-T01

Storm G5 - MCW60 - EK-VGA HF - MCP355 XSPC Restop - PA120.4 - Scythe GT 4x120 1440/1850rpm

http://i3.photobucket.com/albums/y83/dasa09/P1150658.jpg

http://i3.photobucket.com/albums/y83/dasa09/water8.jpg

 

with a 23c ambient the rad water is at ~25c while the rig is idle

load gpu temps after running stalker cop bench with a mild oc

http://s3.photobucket.com/albums/y83/dasa0...ent=stalker.jpg

cpu load temps with ~19c ambient ~21c water

http://s3.photobucket.com/albums/y83/dasa0...=Untitled-9.jpg

Edited by Dasa

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Well, if that's the case, I think a 3x120 plus a 1x120 should be able to handle my system. Been looking at some mods of this case, and it looks like I could probably get all my rads into it if I remove/mod the middle divider; so I would have a 1x120, a 2x120, and a 3x120 cooling it all.

 

something like this:

 

Posted Image

 

But I would keep one of the HDD racks plus the ODD bays. Alternatively, I am now pretty sure that I would be able to squeeze a 3x140 rad into the top (though I will lose at least a couple of ODD bays), but there is only one that I have found that is narrow enough to fit inside the drive bay, and even then, only by 1.5mm or so.

 

This is a rough idea of what it would look like with all three rad's:

 

Posted Image

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oh yea just a heads up, a 140.3 rad has more surface area than a 120.4 so you wont need any extra radiators. ;)

Fair enough, but I already own the EX120, so I may as well use it :P

 

Spose I could always have a 140.3 plus the 120.1 ;) Either way, I really have to wait for the new case to arrive so I can measure it up.

 

well if youve got it already just grab a 360 you'll be fine.

 

Another thing: Will the layout of the loop effect the performance much?? I was thinking of having it go:

 

Pump/res --> GPU --> GPU --> 360/420 rad --> CPU --> 120 rad --> pump/res

 

But I don't know how I will go getting all the hoses in without it looking too shit......

order doesnt matter too much. just go for the shotest/tidest looking loop possible.

 

think the way your currently thinking of setting the loop up will work best and look the neatest. nice paint work :P

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oh yea just a heads up, a 140.3 rad has more surface area than a 120.4 so you wont need any extra radiators. ;)

Fair enough, but I already own the EX120, so I may as well use it :P

 

Spose I could always have a 140.3 plus the 120.1 ;) Either way, I really have to wait for the new case to arrive so I can measure it up.

 

well if youve got it already just grab a 360 you'll be fine.

 

Another thing: Will the layout of the loop effect the performance much?? I was thinking of having it go:

 

Pump/res --> GPU --> GPU --> 360/420 rad --> CPU --> 120 rad --> pump/res

 

But I don't know how I will go getting all the hoses in without it looking too shit......

order doesnt matter too much. just go for the shotest/tidest looking loop possible.

 

think the way your currently thinking of setting the loop up will work best and look the neatest. nice paint work :P

 

Awesome, I was hoping you would say that :) As soon as I have a buyer for my current board/CPU, and the i5-2500K comes in to work I will start ordering stuff. Then I will be able to sell off my XSPC Rasa kit....

 

This is what I will be ordering when the time arrives:

Posted Image

 

Posted Image

 

Posted Image

 

It's a pain that I can't get everything from one place, but oh well, thems the breaks....

Edited by G-relk

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