Quote:
Originally Posted by d0nch1ch1o 
I don't have any dust but does remounting it help that much? Also Rewindlabs, are you Crossfiring a 4890 and 4870 at different clock speeds? I load at high 89 if I turn fan 100% but that's too loud. the max 95c is mostly just FurMark, after Metro 2033, it's like at 85. Any aftermarket cooler that will work well with a 4870 without hogging 3 spaces. Motherboard layout from top to bottom is:
PCI Express x16: Radeon HD 4870
PCI Express x 1 : Blocked by above
PCI Express x 1 : X-Fi Forte
PCI Express x16: Soon another Radeon HD 4870
PCI: Nothing but will be blocked, maybe 3 slot cooler okay, no need any PCI slots.
PCI: Nothing
I also looked at the Akasa Vortexx Neo, it looks a little short for the 4870.
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If you purchased your card new and you haven't changed the TIM so its running on stock TIM from XFX i would definitely replace it...both my 4870 and 4890's stock TIM was not applied all to well and placing a nice dab of Arctic silver 5 on both cards helped my temps
Something you could check into is a
PCI-Express riser...
Here is one you could buy but you may want to look around and see if slower cables (this one is x16) are cheaper as you sound card will only need x1 bandwith to begin with
Edit: I believe i was confused on your exact setup and you will instead need to find an x1 PCI_E riser like these
pictured here
That riser would allow you to move your X-Fi out of the way and you could then use an Accelero S1 .Rev2 which is a cheap but EXTREMELY effective cooler
You could run both of your cards with the S1 coolers and you should be good to go
Yes i am crossfiring both the 4870 and 4890 and yes the clock and memory speeds of each card are asynchronous meaning when i overclock the 4890 past the 4870 i still reap quite a performance boost