X850 XTPE ram need cooling?

|kbn| · 05-12-2005, 02:14 PM

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..

JamesAvery22 · 05-12-2005, 02:42 PM

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.

JSimmons · 05-12-2005, 03:20 PM

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

|kbn| · 05-12-2005, 06:27 PM

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

|kbn| · 05-13-2005, 02:23 PM

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.

JamesAvery22 · 05-13-2005, 02:27 PM

Quote:

Originally Posted by |kbn|

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

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.

05-12-2005, 02:14 PM	#1
\|kbn\| Cooling Savant Join Date: Feb 2004 Location: W. Sussex, UK Posts: 329	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.. __________________ Waterblocks

05-12-2005, 02:42 PM	#2
JamesAvery22 Cooling Savant Join Date: May 2004 Location: Northern VA Posts: 383	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. __________________ Stabbing. My Heatware

05-12-2005, 03:20 PM	#3
JSimmons Cooling Savant Join Date: Apr 2003 Location: 4-sided room with an exit going east, and an exit going south Posts: 392	I just put some copper heatsinks on mine (got them from DangerDen). __________________ My Watercooling Stuff

05-12-2005, 06:27 PM	#4
\|kbn\| Cooling Savant Join Date: Feb 2004 Location: W. Sussex, UK Posts: 329	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 __________________ Waterblocks Last edited by \|kbn\|; 05-12-2005 at 06:44 PM.

05-13-2005, 02:23 PM	#5
\|kbn\| Cooling Savant Join Date: Feb 2004 Location: W. Sussex, UK Posts: 329	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. __________________ Waterblocks

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