Solved Extraction Fan?

I was told I need an "extraction fan" for a video card I wanna get. Is that just the fan you can put over the vent on the back of your computer from the inside?

I believe that is what he meant since he thinks your video card will cook up lot of heat and you need a fan at the back to "extract" the heat.:D

Hello xTweakx,

Usually this would just be a rear case fan. I would get one that has the highest CFM (cubic feet per minute) and lowest noise (db) level you can find for the best airflow.

Hope this helps,
Shawn

Alright cool. I have a rear fan from another computer of mine, but I think it was stock so it might not be good enough. Anyway, is there a way I can check the cubic stuff and the noise level?

Here are some pretty good ones that you may like to take a look:

Newegg.com - 120mm, Case Fans, SILENX, Computer Hardware

Hello xTweakx. You could try searching for comparisons of the various coolers. There are a lot of hardware and overclocking sites out there that do this. An example is
Refined Cooling for Video Cards

http://www.hardcoreware.net/reviews/review-114-1.htm

Alright, thanks. I'm glad they aren't much money.

This is the stock fan that I have on my other computer...

New! AVC F9025S12L 92mm x 25mm Low Speed Quiet Case Fan - eBay (item 370100828690 end time Nov-19-08 23:00:10 PST)

If I wanted to wait to go out and buy one, would this be efficient enough for the Sapphire HD 4850 video card to cool the inside of the computer? Or not?

xTweakx, I can't find much about this fan. However case fans are not expensive. I always prefer 120mm. Zalman make a good fan a bit noisy though, as do Noctua who make a silent fan series which cost a bit more ($19AUD). You need to go for a good quality fan. Best to avoid E-Bay, unless it is an established brand. What existing cooling do you have ie how many fans, what size etc.

By the way, The SilenX fan suggested by BruceX is a particularly good fan with really good noise characteristics. I have 3 120mm Noctua fans in my stock system.

Well after I get the HD 4850, I will have the one that is on the video card, the one that is on my motherboard and then I would have the one I showed you if I took it off my other computer. Would that get me by?

If you are running everything at stock that should be heaps. You can keep an eye on temperatures using a variety of programs you can download. These use the info provided by the motherboard. I have an Asus and use the Asus PC Probe II.

xTweakx said:

Well after I get the HD 4850, I will have the one that is on the video card, the one that is on my motherboard and then I would have the one I showed you if I took it off my other computer. Would that get me by?

Click to expand...

I would say that would be fine as long as your not overclocking anything. Once you have the HD 4850 with a fan of it's own, the fan you have now will be just pure extra cooling.

EDIT: I got it working, most of the temps changed, one stayed the same. Alot of them jump from temp to temp by 2 or 3c. Sounds right though.

xTweakx,

You may not have is connected to a system fan plug pins on the motherboard. It may be labeled something like SYS_FAN, SYS_FAN1, etc.. on the board.


You may also check your BIOS settings to see if there is some option to only turn on the system fans as needed. If you do, just set them to always on.

first look at the holes in your case and find out what size fan your case will accept.

xTweakx said:

EDIT: I got it working, most of the temps changed, one stayed the same. Alot of them jump from temp to temp by 2 or 3c. Sounds right though.

Click to expand...

xTweakx,

I'm happy to hear that you got it sorted out. Thank you for posting back your results.

Shawn

Well it fit/screwed in perfect on the computer. And the temps have actually all dropped about 3-5c. Most 4c. So it's running how it should now. At least it's something until I get out and get a good fan. Thanks guys..