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MikeC
12-07-08, 05:34 PM
I recently switched back to SLI and although I wasn't satistisfied with the high GPU temperatures, like some of you I keep the side of my case open since I swap out graphics cards frequently.

With an SLI configuration using the GeForce GTX 280, I was able to knock of 13 C (from 98 C to 85 C) in the Furmark Benchmark (http://www.ozone3d.net/benchmarks/fur/) at load using a quiet running 120mm fan! This was accomplished by affixing the 120mm fan to blow hot air away from the GPUs like so:

http://www.nvnews.net/images/news/200812/sli_cooling.jpg

A 120mm fan is perfect for this type of application as it does a great job of pushing the heat generated from the graphics cards out of the case while running extremely quiet.

At idle the GPU temps are running at 50 C / 49 C with a default GPU fan speed of 40%. At 50% fan speed, temps drop to 48 C / 47 C and at 60%, temps were 45 C / 43 C. Room temperature during testing was 70 F / 21.1 C.

vgame64
12-07-08, 06:02 PM
Nice. I did the same with my 280 SLi setup and put two Yate Loon 120mms.

Helps a lot.

crainger
12-07-08, 06:20 PM
Is that fan facing the wrong way?

Just kidding. ::D:

einstein_314
12-07-08, 06:28 PM
Nice use of electrical tape. Although I would have used duct tape. Would have matched the silver a bit better. :D

AdamK47
12-07-08, 06:49 PM
Hey chief, your computer is upside down.

DeusGear
12-07-08, 07:25 PM
I have that for my hd4870x2 as well (but it's primary purpose was to cool the north bridge but actually it is cooling the hd4870x2s ram heatsink as well).

Tho Jo Smale
12-07-08, 07:51 PM
Excellent idea,


I've been doing this for years.



JC

methimpikehoses
12-07-08, 08:30 PM
Good idea. Maybe I should just take the side panel off mine and put a fan there like that.

jcrox
12-07-08, 08:46 PM
I gave it a try but, it didn't help me much. This case does have a ton of air flowing through already though.

Bokishi
12-07-08, 11:15 PM
I have 2 120mm fans blowing directly on to the cards. Is reversing the fans and taking heat away a better solution?

MikeC
12-08-08, 05:36 AM
Is that fan facing the wrong way?

Just kidding. ::D:
-1 :afro2:

MikeC
12-08-08, 05:38 AM
Nice use of electrical tape. Although I would have used duct tape. Would have matched the silver a bit better. :DYes, I have duct tape and I know exactly where it is!

MikeC
12-08-08, 05:48 AM
Hey chief, your computer is upside down.LOL - Actually the case is a LIAN LI V COOL PC-V1200A. Great case and components are located somewhat differently than a traditional case.

http://c1.neweggimages.com/NeweggImage/productimage/11-112-089-12.jpg

Power supply at bottom rear, drive bay cages at bottom front, motherboard mounts upside down so graphics cards are at the top of the case. The wheels are my favorite feature!

MikeC
12-08-08, 05:54 AM
I have 2 120mm fans blowing directly on to the cards. Is reversing the fans and taking heat away a better solution?I tried both ways and taking heat away from the graphics cards was much more effective. Since you have two fans you might try positioning one to blow directly on the cards and the other to blow away.

Revs
12-08-08, 08:13 AM
Another good way to keep those temps down with SLI..

http://www.nvnews.net/vbulletin/showthread.php?t=99833 :)

asphalt
12-08-08, 08:57 AM
I also am using the Lian Li 1200 plus case and agree that venting the hot air out of the case yields better cooling than blowing cool air in the case onto the cards. BTW, there is a VGA fan mount for that case if your interested. There is also a side panel with a air vent for the VGA fan mount as well. Here are some links and a couple of pics of my rig for reference:

VGA fan mount (http://www.silverpcs.com/product_info.php?products_id=450&osCsid=4ea631ccc0571a0634140f5bd80cd4e6)

Side Panel (http://www.silverpcs.com/product_info.php?products_id=449&osCsid=4ea631ccc0571a0634140f5bd80cd4e6)

http://www.techpowerup.com/gallery/607/2.jpg

http://www.techpowerup.com/gallery/607/3.jpg

http://www.techpowerup.com/gallery/607/4.jpg

MikeC
12-08-08, 09:22 AM
Thanks for sharing!

XDanger
12-08-08, 11:13 AM
They should really use a push pull system in the first place on stock coolers, Maybe with several small fans pulling.

A fan "Block" that you clip externally to the exhaust like a 360 cooler might also work.

rage10
12-08-08, 08:58 PM
Another good way to keep those temps down with SLI..

http://www.nvnews.net/vbulletin/showthread.php?t=99833 :)

I did that with my old 7950 gt. I forgot who posted it when I made it though... so belated thanks revs!! It droped core temp 15c. It was a single slot cooler also.
My current method is much simpler. I took off the 230 mm fan on the side panal and replaced it with 4 78 cfm red led fans. it sounds like a jet now but I game with a headset so I dont care. PIC (http://www.microcenter.com/single_product_results.phtml?product_id=0293547)
right now I have 300 cfm + - of air flow in my case and I hope to bump that up to 350-400 soon. the fan change made a 5c drop in cpu temps, I'm not sure about the northbridge exept that the temp alarm which used to go off every 10-15 minuites has not gone off once even if my room is at 80f.

Spartan 117
12-08-08, 11:43 PM
nice, glad my case has mounts for 4 120mm side fans, but it gets a bit noisy with that furnace of a rig I got, lol

been a long time since I have come to these forums :)

rage10
12-09-08, 09:13 PM
nice, glad my case has mounts for 4 120mm side fans, but it gets a bit noisy with that furnace of a rig I got, lol

been a long time since I have come to these forums :)

how do you remove the acrilic from it so you can use the fans?

rafarataneneces
12-10-08, 02:38 AM
Guys I need help

I have one GTX 260 Core 216 card running at 61C, and the second one runs at 52

I think the temperature difference is because my PCI Express Sound Card Sound Blaster X-Fi is right on top of the card, and that card produces a lot of heat.

Would you recommend placing 1 ventilator on top of the sound card, and another one on the side of the GTX 260s?

john19055
12-10-08, 04:30 AM
I have a NZXT Tempest that has a 120mm fan that blows air directly on them ,maybe I will turn it around and see if they run cooler.

Revs
12-10-08, 04:45 AM
Guys I need help

I have one GTX 260 Core 216 card running at 61C, and the second one runs at 52

I think the temperature difference is because my PCI Express Sound Card Sound Blaster X-Fi is right on top of the card, and that card produces a lot of heat.

Would you recommend placing 1 ventilator on top of the sound card, and another one on the side of the GTX 260s?

The cause of your problem is probably the heat from your bottom card warming the cooling air going in to the top card. Any of the solutions in this thread should help out alot with this. The best thing to do is do a little experimenting to see which method works best for your setup.

Welcome to the forum :).

Glad it helped, rage :)

rafarataneneces
12-10-08, 07:25 AM
The cause of your problem is probably the heat from your bottom card warming the cooling air going in to the top card. Any of the solutions in this thread should help out alot with this. The best thing to do is do a little experimenting to see which method works best for your setup.

Welcome to the forum :).

Glad it helped, rage :)

Thank you brother

I ordered this:

Logisys 120mm Ball-Bearing 2000RPM Blue LED Lighted Case Fan w/3+4pin Power Connectors

So I will have 3 incredible fans with blue light making everything cooler.

I'm thinking in placing 2 fans on top of the video card, and another one on top of the Thermalright fan for the Intel Core i7 920 processor (overclocked 3.8 Mhz)

One question though, what is the best 'invisible' way to connect these fans to the video cards, and the Black Thermalright CPU Cooler

I have a transparent case so ever engineering that I do (while cheap and functional), can be seen 24/7 from the outside, so I need style as well

I have 4 blue lights inside the case (2 of them sound sensitive, and connected to my headphones), so when I hear music, the whole case lights up

Right now my 120mm fan is connected to the thermaltake using some HORRIBLE rubber stripe, I don't know what's the name of it in english

It's light brown, just horrible