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Would adding a side fan to my case do anything for my temperatures? - Page 3

post #21 of 33
Quote:
Originally Posted by ljason8eg View Post
I think it depends on how your airflow is at stock.

Like, my case must have had crappy airflow, so it helped a lot, if your case has good airflow, it might not make much of a difference.
That's a good point. I honestly don't know whether or not it has good airflow. But, it is forced to live in a deskhole!
post #22 of 33
Thread Starter 
Quote:
Originally Posted by 5CheeseLasagna View Post
That's a good point. I honestly don't know whether or not it has good airflow. But, it is forced to live in a deskhole!
haha well just try it out like me...couldn't hurt
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post #23 of 33
Ambient temps play a big part on overclock temps. It is in no way linear its more exponential.

For instance. When I was testing my 3.4 Ghz overclock last week, we had a warm day that really changed my ambient and I saw a big jump in my idle and load temps.

It was 77F(25C) outside and 72F(or 22.222C) inside. My normal inside ambient is 68-69F(or 20-20.55555C).

With the 20ish ambient my load max was 48C(118.7F) after 5 hours. When it hit 22.2C inside my load max was 53C(127.4F). So from 68-69F to 72F(a mere 3-4 Degree F change) caused an almost 10 degree F change in load temp.
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post #24 of 33
Thread Starter 
Quote:
Originally Posted by SG_Stryker View Post
Ambient temps play a big part on overclock temps. It is in no way linear its more exponential.

For instance. When I was testing my 3.4 Ghz overclock last week, we had a warm day that really changed my ambient and I saw a big jump in my idle and load temps.

It was 77F(25C) outside and 72F(or 22.222C) inside. My normal inside ambient is 68-69F(or 20-20.55555C).

With the 20ish ambient my load max was 48C(118.7F) after 5 hours. When it hit 22.2C inside my load max was 53C(127.4F). So from 68-69F to 72F(a mere 3-4 Degree F change) caused an almost 10 degree F change in load temp.
I think it's more to do with percentage of temp increase. Like a 5% increase in ambient would make the load temp rise 5% as well.
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post #25 of 33
Quote:
Originally Posted by 5CheeseLasagna View Post
Wow.

This is starting to make me wonder what adding fans to my cm690 would do. I currently have it at stock.
I'm going to find out next month. The only extra that I've added so far is a 120mm Scythe S-Flex in one of the top holes. I plan on putting in a second 120mm in the top, a fairly high CFM intake fan up front under the DVD drive and a final 120mm fan in the bottom slot right in front of the PSU. I'm also going to add a second fan to my TRUE 120 for a push/pull setup. So I really hope I see a drop in temps or I'm going to be annoyed for spending the money on 4 more good fans for nothing!

brad
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post #26 of 33
Quote:
Originally Posted by ljason8eg View Post
haha well just try it out like me...couldn't hurt
I'm surprised by two things:

1. The 140mm fan in front has the potential to put a lot of CFM in the case, the MFR obviously chose to use a slow, quiet fan in that position. Not a bad thing, but it does mean you have negative pressure in the case, which you noted.

2. The side fan seems quite close to the rear fan. I would expect the air to "short circuit" and flow directly from fan-to-fan. I suspect the fan you tried is fairly high speed, so the velocity of the fresh air coming in hits the CPU heatsink before it gets pulled out by the rear fan. A larger, slower fan in that position would not work as well.

BTW, what direction does your Thermaltake V1 fan blow, vertical or horizontal? It looks like the side inlet is pretty high, is there any way to get freash air to the video card HSF? I know that 8XXX card is putting out some heat!
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post #27 of 33
This post made me actually test a fe things last night at 2 am. I tested several configurations with my case and fans and discoverd some amazing results.

The way it was
My case has a 90 mm fan at the front bringing air in. (Used to be exhaust, moved to front)
120 mm fan for the exhaust. (added last week and moved stock fan to front)
2 80 mm fans on the side of the unit bringing air in. (stock)
The side of the unit where th fans are, is a metal mesh, approx 1 square foot.

Using Prime95 to stress the system, i coverup up the mesh so see if it would direct air flow differently, maybe more effientially....... NOPE! My temps rose 10c.

Uncovered the mesh and let the temps drop back down to 70c.

Took the side panel off entirely, and temps actually dropped 10c. Down to 60c.

Now mind you, My pc sits in a space in my desk, but it's wide open in the front and the back. The side where the fans were, has about a 4 inch gap from the side of the PC to the desk. I'll have to upload pics when I get home.
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post #28 of 33
Quote:
Originally Posted by 5CheeseLasagna View Post
Wow.

This is starting to make me wonder what adding fans to my cm690 would do. I currently have it at stock.
My CM690 came with a 120mm fan mounted on the side panel. Did you relocate yours? FWIW, any fan mounted on that side panel makes a lot of noise. I had to dampen the CarP out of mine and put a 800 RPM Noctua $$$ fan on it to cut down the sound.

I definitely like the fact that you can choose from two locations, the low one takes good care of your GPU and the top one takes care of your CPU. With an upright HSF like the TT, I'm not sure what the top location would do for you.

It would have been better if the mounting location was 6" further to the right. It would come in right over the RAM sticks and then would have gone into the intake of the fan on the TT. The way it is currently located, it will blow right on the top of the TT, I can't see that helping much.

BTW, I love that case, it is so flexible in terms of airflow.
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post #29 of 33
Quote:
Originally Posted by FerdinandII View Post
My CM690 came with a 120mm fan mounted on the side panel. Did you relocate yours? FWIW, any fan mounted on that side panel makes a lot of noise. I had to dampen the CarP out of mine and put a 800 RPM Noctua $$$ fan on it to cut down the sound.

I definitely like the fact that you can choose from two locations, the low one takes good care of your GPU and the top one takes care of your CPU. With an upright HSF like the TT, I'm not sure what the top location would do for you.

It would have been better if the mounting location was 6" further to the right. It would come in right over the RAM sticks and then would have gone into the intake of the fan on the TT. The way it is currently located, it will blow right on the top of the TT, I can't see that helping much.

BTW, I love that case, it is so flexible in terms of airflow.
I actually haven't moved the stock position of the side panel fan. The funny thing is, I haven't thought of it. But that's me. I need somebody to think of these things first.

But my GPU temps went from 50°C caseless to 57°C with the case, so I'm probably not going to move. Either that, or I'll spend a little extra and get aftermarket gpu cooling.
post #30 of 33
To check if your case cooling is adequate, remove the side panel and get a big box fan.
Set up the fan blowing into the case about a foot away. If temps drop significantly, you have poor case cooling.
LL
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