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Ghetto Cooling for the GTX 275 Standard - Page 2  

post #11 of 323
Quote:
Originally Posted by Sethy666 View Post
Thanks.

The antec fans I was using were 92mm. 80s might do the trick.

The problem with modding the shroud is
1) Its still under warranty, for all intents and purposes.
2) Modding access holes x 2 will be the same as removing the shroud... the airflow will not be the same.

Using stock ATM is not a deal breaker. It cools very well. I was just wondering if I could improve it.
I was more of thinking of just replacing the Galaxy fan and modding the current fan hole with holes for screws to place an 80/92mm on the outside of the shroud. No need for cutting a new fan hole.

I was also thinking that an 80mm with a shroud built onto the opposite end of the DVI ports on the plastic shroud could force air through the shroud, more than the turbine fan ever could. It would just mean covering up the stock fan hole and cutting off part of the plastic... But like you said "it's under warranty", so you don't want to get to crazy!
    
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post #12 of 323
Thread Starter 
Looking closely at the antec fans, it seems they push air straight down. This is due to the solid sides on the fan case. With the galaxy fan, it pushes air down and to the sides. This may be the design characteristic I over looked.

I get what your saying about placing a new fan on top of the current shroud - I think would made it too bulky but it would be worth a shot.

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post #13 of 323


One thing I noticed, there is that one copper pipe that does not have a fan on it and it might traces to the center most part of the block. Three fans covering the top of the sink should make a major improvement. You could also run the fans at 7volts and still use fan speed software or a dial... but who wants to control the GPU fans manually? I don't!

EDIT: That raised area of the sink is also where the vrm is located under(below the exposed copper pipe), so it might be that the vrm was not being cooled properly and contributing to the higher temps. Just a thought! I would defiantly try 3, 80mm fans.

Status of my eVGA 275, Via UPS, is "Unloaded" as of 8:45am. So the truck should come tonight or tomorrow. My 9600GT sits at 34c idle, OCed to 720/1000/1800, see what I can do with the 275 on air before I decide to get a WB for it!
Edited by PDXMark - 1/4/10 at 5:16pm
    
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post #14 of 323
Thread Starter 
Quote:
Originally Posted by PDXMark View Post
One thing I noticed, there is that one copper pipe that does not have a fan on it and it might traces to the center most part of the block. Three fans covering the top of the sink should make a major improvement. You could also run the fans at 7volts and still use fan speed software or a dial... but who wants to control the GPU fans manually? I don't!

EDIT: That raised area of the sink is also where the vrm is located(below the exposed copper pipe), so it might be that the vrm was not being cooled properly and contributing to the higher temps. Just a thought! I would defiantly try 3, 80mm fans.
Quote:
the only other thing I can think of is that the area indicated by the red circle was not being actively cooled.
Yep - I had that thought too (see pic below).

Ive got other issues at the moment with the OS and Im awaiting a fan controller to tame my cable management. The cards working at the moment so I may wait until Ive got everything else under control and then have another crack at it.

Thanks for all your input - its been very helpful. +rep for your time

Edited by Sethy666 - 1/4/10 at 5:22pm
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post #15 of 323
I had an idea today I'm going to play with. I was hinking about when I sectioned off my other case, so the PSU and HDD's were in their own air flow compartment, while the MB had its own compartment. It made a big difference in case temps.

I have an Antec300 that is pretty cramped. You can see that there is a space below the lower HDD next to the pump, Next to the pump there is roughly 3" high and wide to shove 3" ducting next to the pump and into the HDD bay. On the intake I'll tape a 40mm, 12V and run it at 7V to lower the noise. I'll mount the 40mm and duct to an HDD bay wall infront of a 120mm Stealth runing at 12V pushing air into the case and the 40mm intake. I'll take the opposite side of the duct and tape it to the 275's fan intake hole(making it look like crap, lol).

It will forcefully supply more airflow to the crap turbine intake fan on the GTX275. Increasing intake airflow.

Now to think of force exhaust.

    
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post #16 of 323
Thread Starter 
Interesting concept with some great possibilities

How about this for an exhaust (sort of)...

Question: Since your already WC, wouldn't it be easier to WC the GPU.. if possible?
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Long Fang
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post #17 of 323
Thread Starter 
Ive ordered some generic 70mm x 15mm fans. I plan to do some trials based on:

1) 2 x 70mm at either end with stock blower left in situ - shroud off
2) 3 x 70mm, replacing stock blower with 70mm - shroud off

Ill see how it goes.

Ive got some other work lined up on the case, so this is last on the list

How is you forced intake project going?
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Long Fang
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post #18 of 323
May I suggest something?

Properly mod your card: Replace the stock fan that is on your card with a more efficient blade design, cut the barrier around the fan so it is open to flinging air all over the place and to hold it down use double sided tape.

You can use 3 fans: One on each wing and one in the center(or one in the center is the stock fan)

Note: The stock works so well because it sucks cool air and pushes cool air over 2 separate heat sinks! Thus cooling allot better then a blower design that just cools a single massive block that is horrible.

Or, get a accelero S1 R2 and be set with a 120mm fan

Good try at trying to cool your card better but you have to look at why is this way so efficient over anything else? Thumbs up for the work though!
Edited by Nick911 - 1/8/10 at 6:14pm
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post #19 of 323
Quote:
Originally Posted by Nick911 View Post
...cut the barrier around the fan... This is more about finding ways of cooling without destroying the warranty.

...accelero S1 R2... Did you read what card we are working with?

Good try at trying to cool your card better but you have to look at why is this way so efficient over anything else? Thumbs up for the work though!
... I admit, the design is efficient. However, it's not good for a small projector room. It's noisy even at 40%, which I leave it on auto because I've been to distracted to install/use 'Riva Tuner'. I will after this post. I don't want to constantly play with the fan speeds, rather have the robot do that. I've created several types of airflow designs in the past for friends and my own PC's, it's fun. I've always found ways to quiet a system on as little a budget as possible, while increasing airflow.

Summers can be different on case, CPU & GPU temps. An unmodified case airflow in hotter weather will raise temps. If you can think of ways to get air in and out of the case as fast as possible, as quiet as possible. You can enjoy a cool and quiet system for what ever your purposes in hot weather. Moreover, who likes fans screaming at them while watching a movie with friends, it's embarrassing. There is always a cheap and efficient solution for providing 'more' efficiency. Much like I do to my gas camping stove, paintball marker, airsoft rifles, car, home electrical...
Thanks

EDIT: @ Sethy
40mm @ 5V is to loud.. Seems the forced intake is the best method right now!
Edited by PDXMark - 1/9/10 at 4:33pm
    
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System WD5000AAKS Media/Programs/Games WD5001AALS LG DVD/RW Modified 1986 Camaro Heatercore 
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Hard DriveHard DriveOptical DriveCooling
System WD5000AAKS Media/Programs/Games WD5001AALS LG DVD/RW Modified 1986 Camaro Heatercore 
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post #20 of 323
Thread Starter 
Quote:
Originally Posted by Nick911
May I suggest something?
Thanks Nick911... Im always open to suggestions so thanks for your input - appreciated

Thanks also PDXMark... agreed.
Edited by Sethy666 - 1/10/10 at 7:51pm
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