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gaurav_gui
05-13-2005, 09:51 AM
hi!

ATI Radeon X850 Pro or X800 XT?

Key differences b/w X850 Pro or X800 XT for your reference (in that order):

Chipset: R481; R420
Pixel/Texture Pipelines: 12 x 1; 16 x 1
Core Speed: 520 MHz; 500 MHz
Fill Rate: 6240 MTexels/s; 8000 MTexels/s
Memory Speed: 560 MHz; 500 MHz
Memory Bandwidth: 35.80 GB/s; 32.00 GB/s

Pls advise w.r.t. OCing, technology, performance, cooling and price...in

I wish to install this in a dual-Opt246, Asus K8N-DL, 2B RAM setup...thx!

Dan.M
05-13-2005, 03:42 PM
X850PRO like the X800PRO only has 12 Pixel Pipeline..


X800XT has 16 Pixel Pipeline

i think X850PRO is a little bit slower than the X800XT.. but i would recommend the X800XT..

you can just overclock that to X850XT speeds :)

gaurav_gui
05-13-2005, 04:11 PM
thx Dan.M!

is ur recommendation in light of the pixel pipelines only...shouldn't we take the higher core speed, memory speed & bandwidth into consideration...let alone the nxt gen chipset?

wud appreciate recommendations...

malinois1
05-13-2005, 05:12 PM
You are comparing apples to oranges. The x800xt is more comparable to the x850xt ;) . X800xt will outperform the x850 pro

gaurav_gui
05-15-2005, 10:37 AM
fellas, fellas,

leavin out our culinary preferences w.r.t. apples n oranges, i'd appreciate a low-level view of the R480-based X850Pro & how it compares with the R420-based X800XT...

FYR:

"R480 is R423 with tweaks. Tweaks that ATI are reluctant to go into detail about, but encompass optimising the silicon layout to remove hot spots, implementing self-regulated power management to turn off or idle parts of the core not being used, to reduce heat, and introducing more effective throttling techniques to stop heat-related issues."

XII
05-15-2005, 07:29 PM
The X850 is native PCI-E, whearas the X800 is native AGP.
Comparing XT`s with Pro`s is 16 vs. 12 Pipes.
Corespeeds are about the same, th Pe`s a little higher but also verdor`s vary this.
So dependig on the slot of your mobo, AGP or PCI-E, make your choice.

For crossing platforms, there are bridge chips(Rialto), but i don`t now the influence of them on performance.

Android Vageta
05-16-2005, 03:00 AM
Yeah, thats really the only difference between the cores are the native AGP/PCI-e interfaces, so with that said, you want the X800XT.

malinois1
05-16-2005, 03:18 AM
fellas, fellas,

leavin out our culinary preferences w.r.t. apples n oranges, i'd appreciate a low-level view of the R480-based X850Pro & how it compares with the R420-based X800XT...

FYR:

"R480 is R423 with tweaks. Tweaks that ATI are reluctant to go into detail about, but encompass optimising the silicon layout to remove hot spots, implementing self-regulated power management to turn off or idle parts of the core not being used, to reduce heat, and introducing more effective throttling techniques to stop heat-related issues."

Check out this link http://www.anandtech.com/video/showdoc.aspx?i=2290 . Look at the performance charts and it will give you a good idea or the performance difference.

Snafu
05-16-2005, 05:59 AM
Ummm...you can get the x850 in AGP too. NewEgg has them listed - well the x850xtpe. Somewhere around $399 for the Saphire version of ATIs which is listed around $649.

Not sure if they plan to come out with a Pro version in AGP.

I would go for the card with the most pipes. The PE version of the card I have runs core/mem at 520/550. I can overclock it a bit (core/mem ~540/600) with stock cooling (I need to pick up better cooling).

XII
05-16-2005, 06:23 AM
Well, found some new info:

X850XT PCI-E / Core 480 540/587

X850XT AGP / Core 481 (based on 420) 540/587

Both use same core/mem speeds

So the X850 AGP should outperform the X800XTPe (526/574)

No info yet on the core-story of X850Pro/XL (481 - 430/Rialto - 480/Rialto)

gaurav_gui
05-16-2005, 09:30 AM
appreciate that!

i see a remark up there by Dan.M on OCing...Now i'd like to draw all ur attention to the anandtech article as well as my quote on R480's substrate enhancements and its translation into higher, stable clock speeds w/ appropriate heat/power management.

Moreover, is any1 aware if the primary basis for the thrashing X850Pro got at anandtech, i.e. price-performance ratio, has changed since the article's publication date, which is 12/1/2004?

wud appreciate ur arguments in light of the above states facts...cheers!

P.S: what does anandtech mean?