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Looking for advice on WC setup...

W

wildzcardz

Limp Gawd
Joined
Nov 9, 2009
Messages
374
My rig is in the sig. Been looking at doing two HardwareLabs Nemesis 360 GTS Radiators in my case with goals of reaching a 4.6 GHZ oc on cpu and also will be overclocking the gpu. I was wondering to those that are experienced, are 2 of these radiators going to do the job or should I go with a thicker 360/420 up top and a thicker 240/280 on the bottom? What would you recommend for rads? Going with a black EK EVO cpu block and also a EK gpu block.
 
I can't say that I am experienced in these radiators yet but I did just purchase 2 Nemesis GTS radiators 360/240 a couple days ago with plans of overclocking both CPU and GPU on my system. What sold me on them was the Radiator review lineup from xtremerigs, be it from last February, where they were competing with the thicker radiators. Although showing a disadvantage up against a few EK CoolStream, Alphacool and Nemesis GTX radiators in a push/pull config.
 
For a 6700k and GTX 970, two 360 radiators is overkill. Heck, even one is sufficient, as your CPU and GPU aren't exactly high power like the 980ti or the 6-core Intel CPUs.
 
Tsumi said:
For a 6700k and GTX 970, two 360 radiators is overkill. Heck, even one is sufficient, as your CPU and GPU aren't exactly high power like the 980ti or the 6-core Intel CPUs.
Click to expand...

I did plan for an upgrade for a 980ti... but now I am waiting for pascal and will be upgrading to the higher end of that. I will be overclocking both cpu and gpu. Also I want low fan rims so I can be near silent as possible.
 
I have a 4790K overclocked and two 980 Ti overclocked.
I use a Swiftech 360 and an XSPC 240 radiator on a Swiftech MCP 655 pump.

The top temps on the CPU reach 50C and the GPUs 42-44C when gaming.

Two 360 radiators are nice, but you don't need them.:D
 
A good 360 radiator is all that is necessary for any single GPU and CPU system with quiet fans. Even with overclocks. And I can almost guarantee you that Pascal's top chip won't have a higher power consumption than the current Titan.
 
IMO there is no such thing as overkill in water cooling. Trust me you will upgrade the loop as time goes by. What was overkill initially will soon prove to be useful when you add say a second card for SLA.
 
^ What he said. I pulled the 240 out of the top of my case to simplify tube routing, and the 2 degree difference is bugging me so much it's going back in as soon as I need to clean (or have an excuse).
 
Ended up buying 2 Black Ice Nemesis 360GTS Ultra Stealth U-Flow rads and picked up a EK CSQ cpu block so far.
 
Tsumi said:
A good 360 radiator is all that is necessary for any single GPU and CPU system with quiet fans. Even with overclocks. And I can almost guarantee you that Pascal's top chip won't have a higher power consumption than the current Titan.
Click to expand...

Eh I'm of the opinion that there's no such thing as overkill in watercooling. If your case has the space, and you have the budget, stuff as many rads in there as physically (and fiscally) possible.

I mean I've only ever heard of people complaining they don't have enough rad space, but never the other way around.

Also FWIW, I only have a 4930K and one single 980 Ti in my loop, but even with a 420+360+240, it's still a chore to get the GPU to stay below 40C when gaming. Delta T is around 7C with fans at 1000 rpm on the 420+360 and 1400rpm on the 240.

Granted both the 4930K and 980 Ti have a hefty overclock, and the 420+360 have ho-hum Corsair SP fans, but that's still quite a lot of rad space for just somewhat above average cooling performance.
 
You need a crash course on realistic expectations. A GPU below 40 C would hardly be considered barely above average cooling. Below 40 C is extremely excellent cooling. 60 C would be above average on air, about average on water, and 80 C would be around average on air, below average on water.

The typical GPU to water delta is generally 15-20 C under load. At below 40 C under load, your water temps are in the 20 C range. That's barely above ambient depending on your ambient temps. You won't be able to get temps any better unless you go sub-ambient. FYI, 20 C is 68 F, which is relatively cool ambient temps. Additionally, as delta Ts go up, heat transfer becomes more efficient. Your coolant with a delta T of 10 degrees from air to water will dissipate 10 times as much heat as compared to a 1 degree delta T.

There's overkill for the sake of going overkill, and then there's being realistic. I was being realistic. Sure, anyone can throw money at it if they want to and be guaranteed not to have problems, but most of us do not have unlimited budgets. Buying one thing most often means giving up something else.
 
I blame OCN

Seriously though I've seen enough people say their GPU "never runs over 40" with (less than) half the rad space I have to make me start wondering if I did something wrong. But yes I understand delta T is a game of diminishing returns, and to get to a delta T of <5C, I'd probably have to switch cases or literally use every single available fan space for rads.

I agree with your point about working with a budget, which is why I said go overkill IF you have the means to do so.
 
They're probably running 980s or something with similarly low power consumption, or are stating their gaming load temps, which will fluctuate wildly and not be representative of a consistent load like Furmark. The GTX 980 waterblock review showed core to water deltas in the 10 C range with furmark. Higher power GPUs like your 980 TI are likely to be in the 15 C range at minimum.
 
Yes and no. There was a guy who ran a 4770K and 980 Ti SLI with 480+480+240, and another with 3770K and single 980 Ti with 360+240, and both claimed below 40C load temps.

In any case, when I said my GPU ran below 40C, I also meant gaming temp. As you said it fluctuates since it's not a consistent load, but seems to top out around 38-39C.
 
n=1 said:
Eh I'm of the opinion that there's no such thing as overkill in watercooling. If your case has the space, and you have the budget, stuff as many rads in there as physically (and fiscally) possible.

I mean I've only ever heard of people complaining they don't have enough rad space, but never the other .
Click to expand...

Even with a single 290 in a loop my card temperature hovered around 46, with a water temperature of 22c in a 20 degree room. There is a point where heat transfer is limited by head pressure (more rads can hurt this) or flow, and also block design.

But sure, more rads more better. Usually. The issue is price. Adding a dual radiator to my triple radiator dropped component temperatures by... Perhaps 1c? Simply as heat soak was nowhere near the SHC of water.

I achieved much better deltas by heavily lapping my CPU waterblock bars and re surfacing. I removed almost 2mm of copper and resurfaced professionally. Dropped almost 4c. Lapping the CPU properly yielded between 2 and 6c... But water can hold a fucking ton of energy before it raises in temperature... And warmer water releases this energy more readily. Aka 25c water will be hard pressed to release enough heat to hit 24c when compared to 50c water aiming for 49c.
 
Arcygenical said:
Even with a single 290 in a loop my card temperature hovered around 46, with a water temperature of 22c in a 20 degree room. There is a point where heat transfer is limited by head pressure (more rads can hurt this) or flow, and also block design.

But sure, more rads more better. Usually. The issue is price. Adding a dual radiator to my triple radiator dropped component temperatures by... Perhaps 1c? Simply as heat soak was nowhere near the SHC of water.

I achieved much better deltas by heavily lapping my CPU waterblock bars and re surfacing. I removed almost 2mm of copper and resurfaced professionally. Dropped almost 4c. Lapping the CPU properly yielded between 2 and 6c... But water can hold a fucking ton of energy before it raises in temperature... And warmer water releases this energy more readily. Aka 25c water will be hard pressed to release enough heat to hit 24c when compared to 50c water aiming for 49c.
Click to expand...

Ok see this is what I mean. Your delta T is 2C?! Holy crap that's PHENOMENAL cooling, you're probably already way overkill on rad space to begin with, so yeah of course you're not going to see much (if any) difference with an additional rad.

That or you have 3000+ rpm Delta fans.
 
You're reading that wrong. He said his delta T dropped 2 C, not that it is 2 C.
 
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