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4850 Stock cooler is actually aluminium

For a fact that "browner" coloured Cooler is not Cooper, the screws would not be that far away from holes (where the marks are).

I can tell by the colour so could anyone who does some plumbing etc.
 
Just double checked mine again, it's definitely not copper, although the ram sticky pads do seem to feel like chewing gum.

Either way, copper or aluminium, it's rubbish.
 
Just recieved my Powercolor 4850 this morning.

Clocked it upto 700/1100 and it runs at that fine, getting a bit too hot for me liking though. Idiling at 70c and upto 85c under load.

What would be the best performance/price ratio cooler to go for? And what would I need alltogether? Just a new cooler or some ramsinks too? (if so what ones?)
 
VTR said:
Just recieved my Powercolor 4850 this morning.

Clocked it upto 700/1100 and it runs at that fine, getting a bit too hot for me liking though. Idiling at 70c and upto 85c under load.

What would be the best performance/price ratio cooler to go for? And what would I need alltogether? Just a new cooler or some ramsinks too? (if so what ones?)
Click to expand...

Just look into doing the fan tweak on the HD4850. IIRC the fan is currently stuck at something like 15%. A Quick tweak and you can set it however you want. There is a thread on techpowerup forums devoted to it (under the ati section in GPUs)
 
Thanks for that link, much better now.

Idiling around 40c with fan speed set at 65%

Will test load temp after I'm back from the gym.

Not the most quiet fan in the world mind but it does the job once you put the speed up!
 
VTR said:
Clocked it upto 700/1100 and it runs at that fine, getting a bit too hot for me liking though. Idiling at 70c and upto 85c under load.
Click to expand...
Haha your must have a good stock cooler then! :eek:

hd4850stockxx7.jpg


Stayed up to the wee hours last night playing as many different games as poss and the card runs rock solid and very fast indeed! Not sure what the load temps are but as long as its stable thats the main thing!

Gonna leave it as is until the weekend then add a 3rd Party cooler and start clocking (not that it needs clocking but I feel its my duty!)

wayneshd485015lm5.jpg
 
Well have settled for the fan speed set at 50% - no louder than my case fans and idles now at a cool 44c. Will test load temps asap...

edit - to anyone running the stock cooler I reccomend adjusting the fan profile. I've knocked around 25c off idle just by upping the fan speed to 50%!
 
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Its an interesting approach from ATi as far as their cooling on 4850s. They allow their cards to heat up to 75-80c when idling (with fan speed right down to 14%) and only allow a max of around 85c. Thats a running variation of around 5-10c. And I think I see the logic behind this - its not nessecarily the heat which kills the card/chip, its the cycling of temperature that affects its life. What I mean by that is the rapid heating/cooling effect which fatigues in particular the gpu/board interface - and I believe this was a major problem with the gpu in the XBOX360 (ironically also supplied by ATi) which was leading to failure.

Now, obviously, the byggest thermal cycle happens when the computer is powered up/down, but using this approach by ATi, they are almost eliminating the thermal cycling when the computer is actually running. Doesnt matter if the GPU load is cycling from 0 - 100% hundreds of times an hour, the actual temperature variation is small, and that surely has got to be good for the longetivity for the card?

Just thoughts...
 
Biglunn said:
Its an interesting approach from ATi as far as their cooling on 4850s. They allow their cards to heat up to 75-80c when idling (with fan speed right down to 14%) and only allow a max of around 85c. Thats a running variation of around 5-10c. And I think I see the logic behind this - its not nessecarily the heat which kills the card/chip, its the cycling of temperature that affects its life. What I mean by that is the rapid heating/cooling effect which fatigues in particular the gpu/board interface - and I believe this was a major problem with the gpu in the XBOX360 (ironically also supplied by ATi) which was leading to failure.

Now, obviously, the byggest thermal cycle happens when the computer is powered up/down, but using this approach by ATi, they are almost eliminating the thermal cycling when the computer is actually running. Doesnt matter if the GPU load is cycling from 0 - 100% hundreds of times an hour, the actual temperature variation is small, and that surely has got to be good for the longetivity for the card?

Just thoughts...
Click to expand...

That is a good point and to me it makes sense but that don't mean a lot :p
 
Biglunn said:
Its an interesting approach from ATi as far as their cooling on 4850s. They allow their cards to heat up to 75-80c when idling (with fan speed right down to 14%) and only allow a max of around 85c. Thats a running variation of around 5-10c. And I think I see the logic behind this - its not nessecarily the heat which kills the card/chip, its the cycling of temperature that affects its life. What I mean by that is the rapid heating/cooling effect which fatigues in particular the gpu/board interface - and I believe this was a major problem with the gpu in the XBOX360 (ironically also supplied by ATi) which was leading to failure.

Now, obviously, the byggest thermal cycle happens when the computer is powered up/down, but using this approach by ATi, they are almost eliminating the thermal cycling when the computer is actually running. Doesnt matter if the GPU load is cycling from 0 - 100% hundreds of times an hour, the actual temperature variation is small, and that surely has got to be good for the longetivity for the card?

Just thoughts...
Click to expand...
Surely this can't be deliberate though. If the fan is stuck at 14% permanently, and the cards still have a working reduced voltage requirement for 2D mode as was introduced with the 38xx cards, then the temperature variation would be quite large. Unless the undervolting feature doesn't work.
 
Done a bit more testing, running at 50% fan speed constant and I'm getting -

Idle temp of 44c and load temp of 64c.

a lot better than the 70c idle and 85c under load on the default settings!
 
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