4850 heatsink

my bro has a palit hd 4850 gpu but it runs very hot close to 85c under full load my case is well ventilated and i have a fan blowing directly at it but that doesnt seem to help. recently i read that applying arctic silver 5 reduces temps by as much as 10c so wanted you guys to guide me as to how i should remove the heatsing and the proper way to remove the previous paste and apply the new one. if there are any videos or tutorials for this plz let me know!

thanks!

if you are going as far as removing the heatsink i would suggest one that will actually cool that GPU.

I suggest this a the heatsink.
http://www.newegg.com/Product/Prod [...] 6835887009

I have this one personally. I doesnt look like much, but its pretty d**n effective. It dropped my temps from the 70's & 80's down to the 30's and 40's.

If you are going this route i also suggest you pick these up as well.
http://www.newegg.com/Product/Prod [...] 6835887017

the heatsink comes with a few memory heatsinks, but you will need these to cover the voltage regulators at the end on the board.

Arctic Silver 5 is a really good compound, but i have been using MX-2. Its made by the same company, but a few dollars cheaper. I havent had any issues with it and works as well as Silver 5.
http://www.newegg.com/Product/Prod [...] 6835186020

Lets start with the basics.
1) remove video card from the machine
2) place video card on an anti-static bag or something that is unlikely to transfer any static electricity.
3) unplug the fan from the board (should be something like a 2-3 inch wire)
4)turn the video card over.
(the next few steps are a little fuzzy. its been awhile since i looked at the bottom of mine.)
5) you will see several philips screws on the bottom. there should be 4 small ones and several large ones. The smaller ones hold the main heatsink to the gpu. the larger ones hold the "red" shroud to the board.
6) begin by removing all the larger screws that you can find. then remove the smaller screws. the entire heatsink comes off in a single piece (shroud, fan, and heatsink)
7)now this may vary amongst companies. you may or may not have a white gummy like material on your memory chips and voltage regulators. If you dont not intend on replacing the entire heatsink with another DO NOT remove them. if you are feel free to remove them.
8) At this point the GPU and the bottom of the heatsink should be exposed. you will see the grey thermal compound. no doubt it will be hard as a rock due to running at high temps.
9) you will want to buy, if you dont already have it, Acetone and Isopropyl Alcohol. These are cleaning agents, but be advised they have a strong odor. so its best to work in a well ventilated area.
10) with paper towels (folded in quarters), soak a corner with Acetone and in small circular motions begin to scrub away the old thermal compound on both the GPU and the exposed area of the VGA heatsink. If some areas are stubborn you can scrub a little bit more aggressively
11) once all the old thermal compound has been removed grab another paper towel and fold in quarters, and soak a corner in the Isopropyl Alcohol and gently wipe away any thermal compound and Acetone residue away.
12)at this point the GPU should have a mirror like finish with the ATi logo clearly readable. the VGA heatsink should be free and clear of anything as well. BE SURE not to leave behind any paper fibers as this effect the performance of the new compound.
13) now is the time to apply the new thermal compound. you WILL NOT need the entire tube. all you need is a small pea size amount. Carefully apply the compound to the GPU. DO NOT let the tip of the tube touch the GPU either. scratches in the surface of the GPU will also have an effect on the performance of cool.
14) now that the compound has been applied. you need to spread the thermal compound even across the face of the GPU. (i generally use something like a cut-down post-it note. you may also look into card stock, because it a little heavier than regular paper)
15) Now your ready to remount the VGA heatsink to the GPU. Understand that once you place the VGA h/s on the GPU you cannot lift it off again. unless you want to remove and then reapply the thermal compound. Once the VGA h/s has been set twist it slightly to the left and right (this helps to remove bubbles). turn the video card over reinstall the bracket and screws (note: dont tighten any one screw down all the way- this causes uneven pressure to be applied to the thermal compound and the GPU. My suggestion is to install all the screws at once (only screw them in enough to keep them from coming out) Start with any screw and turn it 3 to 4 times then move to the next screw going in a clock-wise direction until all the screws are tightened all the way down. Keep in mind the screws only need to be about finger tight. over tightening could result in damage to the GPU.
16) the last step is simple - reassemble the the video card the same way you took it apart.

does that answer your question?

yeah thats fine