how many rad's, and witch?

[blind_ripper]

hi all.
this is my first time posting here i think , so here we go.
im planning to wc my gaming rig, but now think how many radiators will i need to keep every-thing in check?

the setup:
I7 920 D0 (running air at 3.6ghz 1.15vcore around 76°C load on highest core, crap cooler and mounting i think)
rampage 2 extreme
getting 5870 3 time's but lets say 3x 4890 for heatload would be the same.

i allready got a D5, planning to use it with the primochill T3.
a swiftech 240mm rad in front off the case, should get a other 360mm for in the top off the case.

blocks if got, swiftech GTZ, swiftech NB-MAX for the chipset.
GPU will see what come's out i think.

also im using zalman ZM-F3 led fans @ 800~1200rpm going for how mutch nois i get from them.

now i need to know will the 240mm from swiftech and a other 360mm hold that load nice or should i get a other rad?
and what brand?

what about the flow, thinking a loop for GPU's only and one for the chipset and CPU only(both on the same primochill T3)

thanks in advance blind

[alacheesu]

With 3 graphics cards I would definitely run dual loops (2 separate loops where each loop has its own pump, res, rad). The T3 is not capable of running dual loops, only parallel loops.

[jim0ne]

Definitely go with a dual loop. One loop for your chipset and cpu and other for your gpus. I would suggest a 3x120mm rad for the cpu, since the i7 are like heaters.

You might also want to check out the heatkiller v3.0 cpu block for your I7.

[Jamesrt2004]

imo with a tripple for cpu + chipset then a tripple for gpu also think a dual might start to die while playing games with 3... 3 is a bit overkill though :/

[Caoder]

well the dual should be able to handle a i7 under gaming load ~ 50%. but i think if you route the t3 right.. as in each subloop has a radiator, it *should* be alright depending on the water temps after the rads.

[blind_ripper]

wel i whas think:
the 360mm rad for cpu and chipset, T3 out1->360mm rad->cpu->chipset-> T3 in1
and then for the gpu's, 240mm swiftech + 120mm: T3 out2 ->240mm rad->gpu's all3->120mm rad-> T3 in2

should this work or will the pump not handel the massive loop ?

will a 120mm with the 240mm rad handel gpu's or should i see for 2x 240mm rad's ?

[Caoder]

well a 360 works better than a 240+120 :/ and i believe almost as good as 2x 240... also a 240 on a 3.6 920 is plenty :/ especially for gaming... but if you have the room .. go with 2x240 on the gpus... be warned the swifty stackers don't perform as well as they should.

[millertime359]

The T3 shouldn't be a problem. Norris set his up with a I7, full board cooling, and tri-slied FC 280s and didn't see a temp difference over his true dual loop with DDCs.

The 220 should handle the I7 as long as your not trying to get anymore of a clock than what you have already. If you want to try reaching 4.2, then get a 320.

The 320 should handle those GPUs and the board.

[blind_ripper]

well a 360 works better than a 240+120 :/ and i believe almost as good as 2x 240... also a 240 on a 3.6 920 is plenty :/ especially for gaming... but if you have the room .. go with 2x240 on the gpus... be warned the swifty stackers don't perform as well as they should.

The T3 shouldn't be a problem. Norris set his up with a I7, full board cooling, and tri-slied FC 280s and didn't see a temp difference over his true dual loop with DDCs.

The 220 should handle the I7 as long as your not trying to get anymore of a clock than what you have already. If you want to try reaching 4.2, then get a 320.

The 320 should handle those GPUs and the board.

will im waiting for higher clocks on the watercooling . 4ghz should be the goal: 3.6ghz is only with 1.15vcore .
so adding a extra 120mm rad after the gpu's wont help mutch?

the 360mm will be a XSPC RX360, the MRC220 and what a other 240mm, a will look beter becaus i dont want any radiators to be shown, and the 120mm or the 240mm will be the only one out side off the case. that's where it bugging me to put a 240mm rad on the back .


so this would be the loop config:

CPU LOOP: T3 out 1 -> xspc RX360 -> swiftech GTZ -> swiftech NB-max -> T3 in 1

GPU LOOP: T3 out 2 -> swiftech MRC220 -> GPU's -> 120mm rad (or will it make a big difference with a 240mm) -> T3 in 2

thx all-ready for the help guy's .

[Caoder]

if you plan on ocing the gpus.. a mcr 220 is definitely not enough :/... best bet would probably be to try the 120 when you get the cards and then see the temps. but on the safer side... 360 or 2x 240s :/. Or does anyone know how well the qpstackers cool i mean definately not as good as 2x240s but how does it compare to a 360

[alacheesu]

The 4890s have a TDP of around 200W. An OC'ed i7 produces around 200-250W depending on frequency and voltage. In total that's around 800W of heat at full load!

With 1000rpm fans the XSPC 360 and MCR220 dissipate 370W and 210W respectively at a 10C air-water delta, or a total of 580W.

If you put everything in a single loop, you'll have an air-water delta of approximately 800/580*10C=13.8C at full load which is not very good for the CPU. You could argue that CPU and GPUs are rarely at full load at the same time, but IMO it's better to design at system that cools properly even in the worst case scenario.

If you run two separate loops, you would get these deltas instead (assuming 200W CPU):
CPU loop w/360: 200W/370W*10C=5.5C
GPU loop w/220: 600W/210W*10=28.6C

or

CPU loop w/220: 200W/210W*10C=9.5C
GPU loop w/360: 600W/370W*10C=16C

The last option is the one that makes the most sense, IMO.

[Oli4v]

I'll pm you@9lives.be !

[cobra_kai]

The 4890s have a TDP of around 200W. An OC'ed i7 produces around 200-250W depending on frequency and voltage. In total that's around 800W of heat at full load!

With 1000rpm fans the XSPC 360 and MCR220 dissipate 370W and 210W respectively at a 10C air-water delta, or a total of 580W.

If you put everything in a single loop, you'll have an air-water delta of approximately 800/580*10C=13.8C at full load which is not very good for the CPU. You could argue that CPU and GPUs are rarely at full load at the same time, but IMO it's better to design at system that cools properly even in the worst case scenario.

If you run two separate loops, you would get these deltas instead (assuming 200W CPU):
CPU loop w/360: 200W/370W*10C=5.5C
GPU loop w/220: 600W/210W*10=28.6C

or

CPU loop w/220: 200W/210W*10C=9.5C
GPU loop w/360: 600W/370W*10C=16C

The last option is the one that makes the most sense, IMO.

I am pretty sure that heat transfer is nonlinear with delta T. I don't remember the exact equation, but I think there is a logarithm somewhere in there. Also 1000 RPM fans are pretty low speed, so if OP gets some higher speed fans he should do fine with a 120.3 and 120.2. Also I think 250 watts is on the high side for an i7, even heavily overclocked.

[alacheesu]

I am pretty sure that heat transfer is nonlinear with delta T. I don't remember the exact equation, but I think there is a logarithm somewhere in there.

It's linear. Newton's law of cooling: dQ/dt = h*A*delta_T. If you look at rad reviews they always assume it's linear as well.

Also 1000 RPM fans are pretty low speed, so if OP gets some higher speed fans he should do fine with a 120.3 and 120.2.

I chose 1000RPM because OP said he wanted to run 800-1200rpm fans, as well as the fact that both Martin and Skinnee had numbers for 1000rpm in their rad reviews. Higher fan speed wouldn't change the fact that the CPU would be cooler with two loops, though, it would only make the difference smaller.

Also I think 250 watts is on the high side for an i7, even heavily overclocked.

I agree. I used 200W in the calculations above.

[NaeKuh]

U need 3 monstas with an RD-30.



J/K

the guys above make good points.

[MrBean]

Mmm....if you have the space for it, just get single 480 Feser, single D5, and you're ok. Lot easier, less tubing, cheaper than a dual-loop, and will be plenty cooling for what you want to do.

Sometimes the "KISS" concept works best.

Have fun.