240mm rad for oced cpu and stock gpu

iAboodz · Aug 21, 2014

Hello guys,

So I built a custom loop (finally moved from my Evo 212 which was great btw). I bought the XSPC 750 v4 pump/res comba, the EX240mm rad, raystorm block. I also got a universal block for my gpu later on. I was satisfied with the results (idle was 30*c and max was 50-53*c).

I decided then to add the gnu to the loop, and after a long while of searching I knew that i needed an extra 120mm for the gnu, which i got later with the universal block. the thing is that the new rad had 9.5mm barb which is not changeable, and did not fit in anyway my tubings (7/16). I already went ahed and ignore the internet and installed all my system on the 240mm rad, until i get another 120mm rad for the gpu.

Specs are:
Intel i7 2600k @ 4.3GHz
8GB DDR3 @ 1866
Asus P8z77-v lk
gtx 670 4gb (stock)

Temps for cpu as i mentioned was 30 on idle and 53 max on load. Temps on gpu were surprisingly 25 when i started my pc (never had the chance to let it idle more), and max that i saw was 35 under furmark.

So what do you guys think !?

nukemaster · Aug 21, 2014

The GTX 670 is not a high wattage part.

I have one cooled with a slim(120 x 25mm rad iirc) all on one water cooler mounted to it.

You have the advantage of sharing. So if the cpu is not loaded and the gpu is loaded, you get performance of a 240mm rad. If the cpu is working hard while the gpu is idle, you get a boost in cooling for it. When loaded together you will still get a slight sharing since both parts do not load 100% at the same time in most cases.

As long as the temps are in the range you want, I see no issues.

I would ensure you are cooling the 670 VRM(voltage regulation module) area. If it gets too hot it becomes less efficient and can cause the turbo speed to drop because power consumption may rise. On top of that, parts tend to like being cooler.

iAboodz · Aug 21, 2014

yes i already have that in mind, i see the vrm needs to be cooled as they went to around 85*c. They are without any kind of heatsink now just to test it out. but i'll be getting those:

http://www.ebay.com/itm/4-Stuck-VGA-RAM-Kuhler-I-Cooler-13x13MM-Kupfer-Selbstklebend-I-Heatsink-Copper-/111217836475?pt=DE_Computing_Speicher_Chipsatz_Kühlung&hash=item19e51981bb

http://www.ebay.com/itm/4-Stuck-VGA-RAM-Kuhler-I-Cooler-22x8MM-Kupfer-Selbstklebend-I-Heatsink-Copper-/111217889517?pt=DE_Computing_Speicher_Chipsatz_Kühlung&hash=item19e51a50ed

Can I play on it now though ? mainly bf4. it would be for a while until the heatsinks arrive.

And thanks for the quick response !

Update: I ran bf4 for like 30 minutes and VRMs reached about 80 for seconds then stayed on 78-79*C. VRAMs did not go past 67*C.

nukemaster · Aug 21, 2014

I would at the very least place a fan over them to cool them as much as you can.

If you are not worried about the warranty, cut the old stock heat plate and re-mount it to cover the VRM section. At least the thick base plate can sync quite a bit of heat.

I like to go overkill

The plate was also cut for that all in one block to get direct contact with the GPU.

If you happened to have the second version of the 670, it has its own VRM heatsink.

iAboodz · Aug 21, 2014

That is nice indeed, got me thinking too. Guess i'm not getting heatsinks
I'll definitely make a cut for the reference cooler to fit the gpu block, and keep the original fan !
will post pictures here when done.

Thank you nukemaster !

nukemaster · Aug 21, 2014

I only took off the stock fan because I wanted it to be more quiet, but I still ended up placing a fan on that heatsink(just a much slower one).

You do NOT need that much heatsink(again the 670 is not a heat monster). The stock fan and maybe some small heatsinks on the plate will do just fine. The only thing that may be an issue would be the stock fan running slower because of your lower temperature, so bumping it up a bit may help overall VRM temperatures.

iAboodz · Aug 21, 2014

Well, as I said i ran games on it and vrm did not go past 80 which is as I hear a safe temp for vrm. But i do want to keep them cooled. So using the stock fan with the stock cooler will do that, and i'dn't worry about the noise because the fan would be running at low speed anyway, since it's not really cooling the gpu. If you thought about it, the gpu fan isn't really needed as the stock heatsink does a great job of cooling both vrm and vrams.

http://cdn4.wccftech.com/wp-content/uploads/2012/05/Zotac-GTX-670-5.png

manofchalk · Aug 21, 2014

You have an ambient temperature of roughly 25°C, in a loop with a CPU and under max load your getting temps of 35°C on a slim dual rad?
That just doesnt seem right. Are you running the CPU and GPU under load in these tests?

iAboodz · Aug 21, 2014

manofchalk :

well it went to 40 with bf4, cpu stayed at 53 on one core and around 50 on others.

nukemaster · Aug 21, 2014

Over time, I would guess the water would heat up(upto a point). While not ideal, I think it should still be manageable. Look at the 295X2 and its single thick 120mm rad.

iAboodz · Aug 21, 2014

I'm going for a 120mm rad as i'm planing for a second 670 soon or just a new 8xx

iAboodz · Aug 22, 2014

Update: took out the reference cooler aluminium plate which cools the vrms and vrams, cutted it's edges to let the new block fit.

with old gpu heatsink:

installed on the pcb:

with the block installed:

Installed, up and running

Thank you !

nukemaster · Aug 22, 2014

If you cut a slot in the stock shroud(to allow the 2 hoses out), could it fit back on and direct the blowers air?

Your block looks nice and low profile so it may work.

iAboodz · Aug 23, 2014

nukemaster :

I believe it's possible !
But i do not have the tools to do that now. Also i'm thinking of upgrading, either to another 670 or a new 8xx and i'm afraid it may reduce it's price when i decide to sell it to get 8xx..

nukemaster · Aug 23, 2014

That it may. You would need someone who wants a card to liquid cool.

iAboodz · Aug 23, 2014

Yeah that's not my case... It's hard to even sell that radiator which did not fit my tubings, u think i'll be able to sell my water block ready gpu xd ? No way

nukemaster · Aug 23, 2014

You may be able to. It depends on who is looking.

iAboodz · Aug 23, 2014

I posted an ad today morning, let's see if that's gonna happen ..

240mm rad for oced cpu and stock gpu

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