X850 XTPE ram need cooling?
 

My ram is currently naked, becuase I changed the stock cooler for a waterblock..

I would guess they are hitting 60-80°c for the naked chip in games.

Ive looked at the samsung datasheet and the rated power disipation is left as "TBD" which is helpfull.. and theres no c/w value for the package.. - things usually included in datasheets... but they put in max junction temperature of 125°c..

Site:
http://www.samsung.com/Products/Semi...ily_cd=GME1001

Datasheet:
http://www.samsung.com/Products/Semi...23qf_rev18.pdf

Mine has the 1.6ns ram, K4J55323QF-GC16.


I will probably make up some mensinks anyway. The X850XTPE has mounting holes which cant be wasted.. :)

max power consumption for even the 14ns one is 2v x 1.06A. The 16ns is less than 2watts power consumption. How many chips are on a 850xt pe? 8? 16watts doesnt seem like much so I wouldnt say it needs it. But if you have a fanless setup it would sure help.

I just put some copper heatsinks on mine (got them from DangerDen).

I think the ram runs at 2.8v.. but I didnt look that up.. 2w is still a LOT to disipate from a plastic package that small.. I would not be suprised if it has a 30°c/w thermal resitance or higher - thats gonna make it 90°c.. too hot i think..

edit:datasheet says it runs upto 2.1v.. so your right :)

Ive made my memsinks now..

I done it a very simple way. Im using the stockpart of the heatsink for the back, and I made a slightly modified copy of it for the front out of alu sheet. Ill just crew them together with the card in between.

I expect this will be nowhere near as good as I want, but I will be able to glue some alu heatsinks onto the top and bottom peices..this will make it much easyer to remove them etc.. and make it non-permenent - I hate the idea of thermal-adhesive'ing heatsinks directly to the mem chips.

Pretty sure I picture what you are talking about. I did the same thing with my 9800xt

http://filebox.vt.edu/users/jtorres/...2O/9800xt3.jpg
http://filebox.vt.edu/users/jtorres/...2O/9800xt4.jpg


You can kind of see the bolt that goes through the board that holds the two sinks against the bga chips.

Not being permanent is definitely a plus.