Fractal Design Defince C cooling advice for GPU

KungFuSpaghetti

KungFuSpaghetti

KungFuSpaghetti

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Hi all, wondering if anyone can offer some advice. I have the above case with the two pre-installed push pull fans mounted with are directly inline with my Noctua D14, so my CPU even overclocked is nice and cool and my VRM temps have never gone above 46 degrees. I have however noticed that my GPU is starting to throttle itself when the PC has been on a few hours gaming. I've put a custom fan curve of which keeps temps nice and low, but means the GPU fans are spinning up at 60-100% intermittently.

I'm wondering if it's worth getting a couple of Fractal silent fans (same as ones that came with the case) and mounting these to the bottom of the case to draw air out and if this will make a worthwhile difference. Any advice on this greatly appreciated!
 
KungFuSpaghetti said:
Hi all, wondering if anyone can offer some advice. I have the above case with the two pre-installed push pull fans mounted with are directly inline with my Noctua D14, so my CPU even overclocked is nice and cool and my VRM temps have never gone above 46 degrees. I have however noticed that my GPU is starting to throttle itself when the PC has been on a few hours gaming. I've put a custom fan curve of which keeps temps nice and low, but means the GPU fans are spinning up at 60-100% intermittently.

I'm wondering if it's worth getting a couple of Fractal silent fans (same as ones that came with the case) and mounting these to the bottom of the case to draw air out and if this will make a worthwhile difference. Any advice on this greatly appreciated!
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is it palit dual card or their better gaming/rock ones ? if its the dual the cooler is just bad to start with. Not sure on their warranty or if they stick stickers on the screw but getting some thermal grizzlie paste on the GPU should help heat transfer.
also, you running front intakes at maximum ? more air and cool air will help the GPU a little
 
It's the Palit 1070ti Dual I have. I'll have to have a look at the card to see if there's anything to void the warranty on there, but that might be a good shout. I have loads of the Noctua TIM that came with my D14 left over I could use.

My intake and exhaut fans I've not messed with in the BIOS, they will just be doing whatever the default settings are telling them to do. Suppose I could set them to full and see if the cooling improves, as I think on HW monitor they are running at 1200ish rpm.

My GPU fans obviously point downwards though, so you think it's worth putting two fans at the bottom of my case to vent outwards?
 
Wow thanks, that's some great info right there. I'm now thinking of getting two front fans as they sit lower down in line with the gpu and should in theory push that air back out the back rather than just having the gpu blowing warm air rl towards the bottom of the case.
 
Two good 140mm front intakes with top one speed controlled by CPU temp and bottom on by GPU temp and you should be golden.
 
I've got the choice of x2 140s or x3 120s at the front. I've ordered x2 120s which gives me 4 in total. Can always leave the 120 exhaust, and move the others to the top and bottom of the case if 3 at the front are no good. I went for fractal design x2 gp 120s to keep everything the same. They seem to shift a decent amount of air and are pretty much silent. Tempted to just run them at max speed with the case being so well sound proofed.
 
If you get 2x good 140mm intake for the front they will move as much as 3x good 120mm intakes. The added advantage of using 2x good 140mm intakes with a pressure rating of about 1.5mm H2O at about 1300rpm is you don't need any exhaust fans. Just block off / seal off all openings in front except where the 2x 140mm intakes are and they will push air right on through the case and out the back. Oh, and also remove all PCIe back slot covers to give exhaust venting behind GPU so the intake air flow to GPU intake and pushes GPU heated exhaust on back and out of case. ;)
 
Once again thank you! Great advice! I'll get x2 fractal 140mm fans for the front, the 4 I'll have can be x2 at the top of the case, x1 exhaust and one at the bottom. That will be the case limit then lol.

I'll make sure to remove all those pcie blanking plates too!
 
Fractal Dynamic X2 have very low static pressure ratings .. less then 1.0mm H2O .. and as such have a hard time even at full speed moving much air through front grill and airfilter .. which is why I said "pressure rating of about 1.5mm H2O at about 1300rpm".

if the grill and filter resistiance is eqaual to about 0.8mm H2O then a fan with 0.8mm H2O static pressure rating is at it's static point .. as in no air movement.

Static pressure rating is maximum pressure the fan reaches when it stops moving air.
 
If you need Fractal Design name, the Vernturi HP-14 PWM
If other brands are acceptable look at PH-F140MP, Silent Wings 3 and the like
 
PH-F140MP are only £12.95, but are quite good. If you want even lower cost Arctic F14 PWM are not bad and only £6.95. Not as good, but for 7 quid not at all bad.
 
Well, that 36dB is delivering free airflow, no restrictions. Actual will be louder for fans as well as additional noise of air moving through grills, fins, etc.
 
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