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Need two 140mm fans for top exhaust. - Page 2

post #11 of 13
Quote:
Originally Posted by ehume View Post
If you're running your heatsink front-to-back, you won't want two 140mm exhaust fans. You'll want one 140mm top intake fan at the front to present your cpu heatsink with cool air. You will then block the rear top fan position to prevent air recirculation. People who have switched from top exhaust to top intake see a 3-5c improvement in the cpu temps.

The TR X-Silent 140 is a fine fan, but struggles, vibrates and clicks when output is pointed up. The Prolimatech Blue Vortex (the Red Vortex is an LED fan) is better than the X-Silent, and can be used horizontally, but again vibrates a bit when pointed up.

You can use many 140mm fans pointed down, which I recommend.

For comparisons on 140mm fans see item 4 in my sig, and this review. Both have been cited above.
Don't mean to hijack the thread, my apology to OP but since I kinda have the same questions for ehume might as well do it here:
I'm looking for 2x140mm fans to replace the 2x140mm fans in my Corsair 700D (1 underneath the hard drive and the other for intake right next to it), what would you recommend?
I'm gonna order 5x120mm Gentle Typhoon AP-15 so I'm also looking for the best 2x140mm fans possible to come with it. Do you think I really need to push lot of air using those 2x140mm? If not then the less noise the better for me.
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post #12 of 13
Quote:
Originally Posted by iTravis View Post
Don't mean to hijack the thread, my apology to OP but since I kinda have the same questions for ehume might as well do it here:
I'm looking for 2x140mm fans to replace the 2x140mm fans in my Corsair 700D (1 underneath the hard drive and the other for intake right next to it), what would you recommend?
I'm gonna order 5x120mm Gentle Typhoon AP-15 so I'm also looking for the best 2x140mm fans possible to come with it. Do you think I really need to push lot of air using those 2x140mm? If not then the less noise the better for me.
On my own rig I intend to install a Prolimatech Blue Vortex with an inline resistor from a Zalman F3 kit for a mid-case fan. That brings the fan speed down a bit, but I still get lots of airflow. I think people sell fan speed reducers, or you can make one if you have the extra bits and you're handy.

An even quieter fan is the T.B. Silence, at 750 rpm. But its output is quite weak. That's why I like the Blue Vortex. OTOH, the Blue Vortex vibrates a bit when air is pointed up.

I just looked at a video review of the 800D, I think. No holes for 120mm-mount 140mm fans. But you can use Velcro and mount TY-140's, using either resistors or the 5v lines of your Molex to bring the noise down if they're too loud (I don't think they will be, though).

The nice thing about the Obsidian is there is room for at least one top-mounted 120mm intake fan. But before buying GT's (best 120mm fans) see if the TY-140 will fit. If it does, put a TY-140 there: the opening is square, and a 120mm fan wastes that area, where a 140mm fan makes the most of it.

[/hijack]
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post #13 of 13
Quote:
Originally Posted by ehume View Post
On my own rig I intend to install a Prolimatech Blue Vortex with an inline resistor from a Zalman F3 kit for a mid-case fan. That brings the fan speed down a bit, but I still get lots of airflow. I think people sell fan speed reducers, or you can make one if you have the extra bits and you're handy.

An even quieter fan is the T.B. Silence, at 750 rpm. But its output is quite weak. That's why I like the Blue Vortex. OTOH, the Blue Vortex vibrates a bit when air is pointed up.

I just looked at a video review of the 800D, I think. No holes for 120mm-mount 140mm fans. But you can use Velcro and mount TY-140's, using either resistors or the 5v lines of your Molex to bring the noise down if they're too loud (I don't think they will be, though).

The nice thing about the Obsidian is there is room for at least one top-mounted 120mm intake fan. But before buying GT's (best 120mm fans) see if the TY-140 will fit. If it does, put a TY-140 there: the opening is square, and a 120mm fan wastes that area, where a 140mm fan makes the most of it.

[/hijack]
Thanks ehume, these fans are what I'm looking at after doing some searches and reading your reviews:
- Prolimatech Blue Vortex 14
- Scythe Slip Steam 140
- Thermalright X-Silent 140
- Yate Loon 140
They're all under 20dBA and I think I can live with that, I'm gonna get a fan controller so it wouldn't be an issue.
So which one of those would get your vote for best noise/performance ratio?
I don't care much about the HD intake fan but I think it's important to pick the right intake fan between the two compartments.
As for the TY-140 I would love to try but I just ordered 5 Gentle Typhoon AP-15 so it's out of the picture now.
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