Originally Posted by MiiX
You'd need more than a EK XTX360 to cool 2x 780's + 4770K, right? no harsh overclocking, lower voltages only if the chip(s) allow it.
Id say definitely yes..... the "rule of thumb" can't apply both to 150 watts GPUs and 300+ watt GPus when ya getting only 60 - 90 watts per 120/140mm
I have a 420 + 280 for two 780s (25+% OC) and 4.6 GHz 4770k w/ 1250 rpm fans in push....
with air filters removed and 1200 rpm fans speed, delta T is 8.4C, GPUs at 39C under Furmark
with filters in and 850 rpm fans speed, Delta T is about 12-14C, GPUs at 44C under Furmark
Originally Posted by Evil Genius Jr
That's basically how I will have my loop, except I only have a top rad and CPU only right now, will be adding front and gpu later. It looks good although I put the top rad as intake.
Its oft said that order doesn't matter but that statement needs a qualifier..... I'm showing as much as a 2C drop across each rad depending on pump speed. And no it won't matter as to the average temp of the loop but with ya CPU hovering in the mid 70s, and GPUs in the low 40s.... what component would benefit most from coldest water ? So at least theoretically ya CPU could benefit from being 1st after the rads .... but my guess is it would be less than a degree if that.
OTOH, unlike in the past, OCs on water cooled systems today are rarely limited by heat .... more likely bu max safe voltages so .... with that in consideration....it really doesn't matter at all.
Originally Posted by Ragsters
A pump always pushes fluid never pulls.
Semantics really ..... one of the subjects that generated the most discussion when i taught fluid mechanics. It does both actually in a closed loop but is more evident when ya open the loop. Replace the res with a 5 gallon bucket open on top ..... now put the bucket on the floor..... as long as "suction" tube remains submerged the pump will pull the water outta the bucket. Once primed a pump will continue to suck up \liquid until the lift approaches the Net Positive Suction Head at which point the liquid will vaporize.
Another way to think about it ..... if ya tubing pops off the pump discharge, will the pump empty the loop w/o the pump to push coolant into the intake ?
Originally Posted by Striker36
only till its 100% full. then it would function as any other section of tubing. but still. it seems like kind of a waste imo.
Sealed res even with air in maintains pressure......also extra thermal mass is valuable for cooling ....as load varies , heat to system varies....more thermal mass allows system to absorb spikes and maintain more stable temps.
Originally Posted by Chopper1591
Are there guys here who run a cpu only loop with a single 240 radiator?
Care to share me some info on cpu temps?
Not running it but can give ya the math
UT60-240 = 125 watts at 1250 rpm w/ 1 fan
UT60-240 = 140 watts at 1400 rpm w/ 1 fan
Haswell OC'd tp 4.6 @ 1.4 volts is about 145 watts.....and don't forget that ya MoBo, res, tubes and everything else also radiates heat....the theory says you'll see 10C .... I'd bet you will see < 7C....Thickness doesn't change things much...XT45 is 122 watts at 1250 and ST30 is 120 watts at 1250.Edited by JackNaylorPE - 1/6/14 at 11:35am