WHy are GPU always upside Down?

[smogsy]

Seriously i don't know, has anyone thought of this?
im refering to the GTX295 Design for this post

We all know heat rises? don't we!

so if the GPU is upside down and the fan is sucking in air it pushes the hot air out which is perfectly fine. but if the GPU is upside down the heat will go out of the bottom the card (where the mesh holes are) and because its still hotter rise back into the card?

am i bonkers? or am i right?

if they redesigned the PCB so the fan was facing upwards and mesh was facing the PSU/CPU surely the GPU would get less toasty?

i would like a good discussion out of this
What are your thought?
Do think it would be good idea to have the fan facing up.
wouldn't you like to see the gfx on your graphics card with out buying a lian li case?

no flaming me were friends here

 

[555BUK]

If they fitted them the other way, many coolers would not fit due to contact with the motherboards Northbridge, CPU Heatsink, mosfets etc.

 

[DeathTyrant]

My old Lian Li V2000 had the motherboard inverted and on the other side, so it had them facing the way you mentioned.

 

[Lightnix]

I would've thought that'd be a good thing because otherwise the heat would rise into the CPU - remember, these are not passive coolers, I think the air movement in the case will make the effect of the heat rising back into the heatsink almost negligible. That and heat will always transfer from a hot place to a cooler place, if my B that I got in GCSE double science a year and a half ago p) serves me rightly, the reason that 'heat' rises is actually because the air particles get more energy and so rise above the cooler particles. This doesn't happen in a metal heatsink as the particles aren't moving around, as the heat is transfering via conduction through the metal heatsink.

 

[pby]

isn't that just a blower fan? most of the heat should just come out of the case.

 

[reflux]

BTX was supposed to address the thermal limitations of the ATX design, but alas, it never caught on and Intel have stopped development on it.

 

[caithomas44]

otherwise you would be pushing hot air over your cpu, or drawing hot air from over your cpu! (dependant on which way the fan goes)]
either way it wouldn't be very good for heat management!

 

[sorn21]

Most of the heat is escaping through the exhaust holes in the back of the case, the rest of it is being pushed down and most decent cases will then push the air out of the back of the case / PSU will take care of it.
Thats what I imagine anyway!
When I first saw gfx cards I thought that they would be mounted upright for the "pretty pictures" to be seen! But the more I think about it, makes sense as not to disturb the airflow of the cpu etc. etc.