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ohhgourami's GPU, PCI fan mod - Page 3

post #21 of 60
Quote:
Originally Posted by i5-4670k View Post

I came here to say that I want to remove my GPU fans (2x 70mm) and install two 120mm fans just below the slot, will it work better? The 70mm fans are kinda dying. Also if it works, I plan to use a high RPM 120mm fan for it.

I tried this on my reference 7950's. No, the stock fan was still better, even though it was horrible. However, removing the shroud (in my situation), and strapping a 120mm fan over my VRM section of the cards helped out a TON. I did still have to leave the annoying stock fan in place though.

Only way to find out is to try it and report the differences.
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Junkyard
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NAStradamous
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HTPC01
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CPUMotherboardGraphicsRAM
Intel i5 2320 @ 3.1GHz MSI B75MA-E33 HIS HD7970 3GB @ 1050 / 1700, 1.17v Patriot 2x4GB DDR3-1066 
Hard DriveHard DriveOptical DriveCooling
Crucial MX100 256GB WD Green 2TB DVDRW Corsair H50 Push / Pull 
CoolingOSMonitorMonitor
NZXT 120mm fans strapped to stock 7970 cooler Windows 10 Pro Dell 3007WFP Dell 2007FP 
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Dell 2007FP Cheap Toshiba (R.I.P. Ducky) PC Power & Cooling Silencer MKIII 950w Cheap Garbage (free) 
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Windows 8.1 + Steam Big Picture / Plex HT 50" Insignia LED 1080p Logitech Rosewill Green 530w 
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Silverstone HTPC Logitech Pioneer 2.0 tower speakers + 135w RMS Rosewill MCE Remote 
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post #22 of 60
Thank you for replying!

A little clearer picture for you.

I've got the 560Ti twin frozr, 2 in SLi. There is a 2 slot space in between the two cards (kudos to GA-Z87X-OC).

I plan to remove both stock fans of 70mm, and place two 120mm fans just below the card, i.e. third slot in each case. The twin frozr with its shroud off takes exactly 2 slots. Depending on how I do it, the fans may or may not stick to the heatsink (if it has to stick, I might make it possible.

Is there any point leaving the fan there even if its dead? The twin frozr's fans will be dead soon and I dont want to RMA it. I don't want anyone's broken card as a replacement which may or maynot work for long for a card which works perfectly, and only has issues with its fan.

This guy here does a mod of 92mm fans on his gpu and says the temps drop to the max of 46c, which I think is impressive, and would have better results with a 120mm fan. Unless of course he is lying.
post #23 of 60
I have done similar myself and usually get much better cooling and also quieter system.
CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), default quality

Size and thickness of fans is determined by cooler fin area and available space for air to get to fan intakes.

Arctic F8, F9 & F12 TC fans are nice because they have a temperature probe to control their speed. Slipping the probe between the cool and PCB usually results in good speed control.. and it can be moved to hotter or cooler position as needed to adjust fan speed.

PWM fans are great but require adapter and splitter to connect to GPU fan header. First link in sig gives more detail. Same applies to GPU fans as case fans using GPU control.
post #24 of 60
Thank you for replying!

Can you show the GPU in the third image in more detail? If you take it out for cleaning that is. I kind a want to see what exactly is holding it down to the PCB, from where you are passing your Zip-Ties.

Also, right now I plan to try only 2 basic 1200rpm 120mm fans. If the mod works better than the stock cooling, I will get some high cfm fans for the extra heat. I think since the card without the shroud takes exactly two slots, a PCI fan mod as the third slot to cool the gpu should do?
post #25 of 60
Fans are 25mm thick, PCI slots are about 21mm. So you will be using very close to 3 full slots of space, meaning you will get at least 1 more slot for airflow to fans.
Sorry, but that system is in Ireland. I doubt I will ever see it again. I just run the zip-ties through fan mounting hole, around back of fins and back to fan mounting hole on other side of fan. Than put a second zip-tie end on it. wink.gif
post #26 of 60
Is the 1 slot going to be enough?

Or this is something which has to be tested to be determined?

Another thing I can do is 3x80mm fans which are considerably weak in airflow.
Edited by i5-4670k - 2/24/14 at 1:57pm
post #27 of 60
Too bad Thermalright doesn't sell their TY-100 fans separately from AXP-100 cooler.
It is 108x101x14mm, PWM, 900-2500rpm, 44.5cfm. I have 2 on my ENGTX580DCUII. Build a couple of HTPCs that owners wanted 120mm fan on. Don't ask me why. And put them on mine.

Scythe Slip Stream 2000 RPM 120mm Slim Case Fan, SY1212SL12H , 45.5cfm, 120x120x12mm

GELid Slim 12 UV Blue (FN-FW12SlimB-15), 120x120x16mm, 1500rpm, 48.3cfm

GELid Slim 12 PL Blue (FN-FW12SlimBPL-16), 120x120x16mm, 900-1600rpm, 25-42.5cfm, 0.5-1.35mm H2O
post #28 of 60
Thread Starter 
Lots of good advice! I can't believe by thread has risen from the dead!

I say strapping the 120mm fans directly on the heatsink might just be good enough. That's probably optimal for temps/noise as that 1 slot will be sort of enough unless you plan on getting an extra thin fan. Just make sure you remove your PCI slot covers and provide tons of positive airflow so the fans on the GPU don't starve.
Edited by ohhgourami - 2/25/14 at 10:37pm
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post #29 of 60
What about using a single, larger fan instead?
post #30 of 60
Thread Starter 
Quote:
Originally Posted by Popple View Post

What about using a single, larger fan instead?

Possible, but might not be as effective if it can't direct the air right into the GPU fans.

If talking about strapping a single large fan into the GPU heatsink, then it definitely won't be as effective as 120mm or 140mm as the "cone" of air will miss the heatsink most of the time.
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