x850xt pe vs x800xt

[kmanuel]

what is the main difference between the two?
Can overclocking an x800xt give you 850 performance..

I just bought the 800, should be here on Thursday.

 

[brionbastian]

An X800 is pretty much the same hardware as a 8500 XT PE, same number of pipelines and that kind of thing. To my knowledge it's just a matter of GPU and memory speed. My X800 XT can run 555/1200 stable and I assume that's faster than a X850 XT PE at stock. Of course an X850 XT PE should OC much higher than a X800.

 

[Digital Viper-X-]

An X800 is pretty much the same hardware as a 8500 XT PE, same number of pipelines and that kind of thing. To my knowledge it's just a matter of GPU and memory speed. My X800 XT can run 555/1200 stable and I assume that's faster than a X850 XT PE at stock. Of course an X850 XT PE should OC much higher than a X800.

not so true, I Couldnt really OC my XT PE that much, if you can oc ur X800XT to XT PE speeds it should be the same.

 

[brionbastian]

not so true, I Couldnt really OC my XT PE that much, if you can oc ur X800XT to XT PE speeds it should be the same.

Probably because most X800's and X850's use the same core, the ones that end up as X850's just happened to be stable at X850 speeds. An X800 may OC to be stable at X850 XT PE speeds (or higher) with an aftermarket heatsink, while an X850 XT PE may not be able to go much higher with any heatsink because of hardware limitations. Cores can only clock so high and I would guess that ATI didn't invest much effort into making sure that you've got some headroom for OC. They just want it to be stable.

 

[entermymatrix03]

I think they put some time into it because that ViperJohn guy got 714/645 out of his X850XT and only 660/642 out of his X800XT. The way he has those things rigged up on watercooling and air cooling combined makes me think that he got the max out of them.

Some others had gotten 783/702 out of their X850XT. That is just nuts if you ask me.

 

[bobzdar]

x800 uses the r420 (agp) or r423 (pci-e) core, x850 is r480 core. The r480 is a die shrunk r423, so it o/c's a little better. Around 20-30mhz from what I've seen. The only other thing to look at is the memory speed...