Improve my Cooling (Pic inside)

MFrost

MFrost

MFrost

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20 Feb 2007
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131
Hi folks,

I'm calling on OcUK to provide some advice on cooling. I have a Corsair 700D and my temps just seem too high. i7 950 hitting 75'c under normal load (currently only overclocked to 3.8) graphics card (gtx480) hitting high 90's.

The inside of the case feels too hot. When i take the side of the case off I get a good 5-10'c off the temps but i'd rather not run it with everything out in the open.

Below I have attempted to make a picture (in paint) of how the cooling currently is:



I'm toying with the idea of changing direction of the CPU cooler and making the rear of the case an intake and letting the top fans exhaust? Good idea/bad idea?

OcUK...fix my cooling!:confused: What am i doing wrong here.
Thanks a lot for any advice!
 
Unless you have deliberately switched the fans round on the Noctua D14 then you have the cooler on backwards with the fan trying to intake air right next to your exhaust fan.

If you have switched them then disregard this.
 
Duke said:
I'm thinking you really need a front or side intake fan and could probably turn off one of the top ones.
Click to expand...
I also thought this, but then thought it would be made redundant by the top exhaust fans pulling the air that the front fan has brought into the case straight back out again?

liquidex said:
Unless you have deliberately switched the fans round on the Noctua D14 then you have the cooler on backwards with the fan trying to intake air right next to your exhaust fan.

If you have switched them then disregard this.
Click to expand...

I did switch them as think i mounted the heatsink around the wrong way and couldnt be bother to take it off and turn it around again :rolleyes:.

Thanks
 
In that case maybe turn those two fans on the Noctua around to blow from left to right and also do the same for that case fan so it becomes another intake fan as it seems you aren't getting enough fresh air into the main chamber.
 
You have one and a half fans intaking (from psu chamber and I count the hd bay one as half as its obstructed.) and six exhausting into the main chamber with that setup. At least trying the DH14 other way round probably couldnt hurt.
 
I think a common option on this case is to swap the right most of the top three fans from outtake to intake. This will blow air down towards the bottom of the case and in theory it should circulate back up. Swap the rear exhaust to intake as well, then you will essentially have 2 intakes and 2 exhausts for the main compartment, with the extra intake at the case bottom, which in my opinion is hampered by the design in terms of what cfm you ultimately get with the arrangement of those bottom fans, I suspect given the voids and separation the bottom fans see a large pressure drop and therefore at not as efficient as a normal case fan arrangement.

Turning the psu round is only an option if you also make a cut out in the compartment separating plate where the psu fan would go.
 
The problem is he has got negative air pressure you need 1.5x-2x the amount of incoming air as you have out going air to create possitive air pressure and get the air curculating faster and ther for lowering temprature due to the wind chill off higher speed air movment
 
el Kuarlos said:
You have one and a half fans intaking (from psu chamber and I count the hd bay one as half as its obstructed.) and six exhausting into the main chamber with that setup. At least trying the DH14 other way round probably couldnt hurt.
Click to expand...

Point well taken, i've moved the fans on the DH14 to face the other direction as shown in the new picture.

Bubo said:
I think a common option on this case is to swap the right most of the top three fans from outtake to intake. This will blow air down towards the bottom of the case and in theory it should circulate back up.
Click to expand...

I did try this, but I couldnt feel any air from the right hand fan at all after about 1/4 of the way down the case...I think the 2 left top fans were sucking the air straight back out again.

Bubo said:
Swap the rear exhaust to intake as well, then you will essentially have 2 intakes and 2 exhausts for the main compartment, with the extra intake at the case bottom, which in my opinion is hampered by the design in terms of what cfm you ultimately get with the arrangement of those bottom fans, I suspect given the voids and separation the bottom fans see a large pressure drop and therefore at not as efficient as a normal case fan arrangement.
Click to expand...

The bottom intakes are diabolical to be honest...the fans they come with move no air as it is...so trying to push some air through a shed load of cables from the power supply then into the case is almost resulting in no air what so ever.

Mr. May said:
create possitive air pressure and get the air curculating faster and ther for lowering temprature due to the wind chill off higher speed air movment
Click to expand...

I'm not really sure how positive and negative air pressure works in computer cases :confused: but i guess you're saying to try and equal intake fans to the outake fans? (e.g. 3 intake, 3 outake)

Anyway here's what I have now...the CPU seems to be quite a bit cooler now (7-10'c cooler in fact)



The graphics card is still in the 90'c to 100'c mark but there doesnt seem to be anything I can do about that - there are just no mounting points for fans at all near that.

Any other suggestions for trying to cool this down some more are very welcome. I seem to be spending more time trying to cool this monster down than actually using it!

Matt
 
what you need is a bucket of distilled water and a gallon of pt nuke and just throw it inside the system to cool it down.
 
I hate to be a tool, but don't buy a Corsair 700d/800d for air cooling? ;) The amount of times I see this discussed on forums and the moral always seems to be to just accept it, or get water cooling. These cases weren't ever built to accel at air cooling really.

The idea above looks ok maybe if you added a shield between the two top exhausts and top intake, so that the top intake blows it straight down over the cpu without interfering as much with the two top exhaust directly to the side of it. Failing that you could add an intake to the side panel or front panel if you modded the HDD layout. Kind of defeats ever buying the case though I guess.
 
jaybee said:
I hate to be a tool, but don't buy a Corsair 700d/800d for air cooling? ;) The amount of times I see this discussed on forums and the moral always seems to be to just accept it, or get water cooling. These cases weren't ever built to accel at air cooling really.
Click to expand...

I didnt realise to be quite honest, i purchased the 700D because it was big and looks so pretty. I like the simplistic look.

domthecondom said:
how tidy are your cables? Maybe you got a hella mess inside?
Click to expand...

It's almost the opposit, it almost looks as if the computer has no cables, they're all hidden away.

Did a prime 95 while I noshed on my dinner and my CPU is hit a max of 74...which i'm hoping is fairly safe?
 
First thing is the graphics card. Are you sure it's blowing hot air into the case? The corsair isn't cheap, so I'd expect you to be using a high end graphics card which is likely to use two slots and blow hot air out the back.

I'm with rjk on this one. Your next step is going to be using ducting to direct airflow, and at that point water makes a lot more sense. It's far easier to route tubing than it is to optimise airflow.
 
Your problem is the air that is coming out of the main chamber intake, along with the air that comes from the HD bays is taking the easiest route out...via the front top two cooling fans, mainly the front one- it isnt getting a chance to be heated- that front fan is probably leaving your cpu and gpu in a dead spot (draw a line form the psu intake to the top of the case- it does not go over the hot components). Moving air is useless unless it travels near enough to the hot components to pick up heat.

The GPU is trying to suck in low pressure air also due to intake being lower than exhaust, meaning that it isnt being fed with cold air as it might be, every rpm of the fan will get in less air than if it was outside the case as it is fighting with three other fans all of which are being fed by one and a half.

Give this a try...seal off fan 1- as in the fan nearest your pc front. Cardboard or whatever. You have enough airflow to get the heat out, perhaps this might mean the air, rather than moving out super fast via the easiest route, will pick up more heat as it has to take a route closer to what you want cooling. Leave top fan 2 and three as exhaust.

An antec spotcool, whilst it leaves some to be desired would be my next step, pointed at the 480 intake, aimed to the left of the psu intake blowing towards the 480 or at the metal heatplate it has. Have no illusions though they are not easy to place- they bend a lot but your beef sure as heck isn't fans or air movement, it is how it is all directed.

Its a suggestion, you have nothing to lose sealing that front top fan and letting us know.
 
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