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X1900XT has 48 shader while X1800XT has 16?

post #1 of 12
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I read somewhere that the X1800XT has 16 pixelshader while the X1900XT has 48. Just posting to make sure that i'm not reading bogus info
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post #2 of 12
Correct.
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post #3 of 12
Yeah, R580 = 48 shader pipes, and R520 = 16.
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post #4 of 12
Hence why the x1800XT was a complete miss and the x1900XT was a success.

Those added pipelines really help with the Anti-Aliasing in high resolutions, but that's pretty much it, FPS are on par with nVidia's but the 7900GTX really lacks with AA and AF turned on at those resolutions
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post #5 of 12
to make sure people don't fall into a common false belief, please note that the card does not have 48 pipelines. it has 48 pixel processors, but retains the same number of full pipelines as the X1800XT.
post #6 of 12
So what is the difference between pixel shaders and pipelines? And do you think there would be a possibility of unlocking extra ones on the x1800 series?
 
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post #7 of 12
Quote:
Originally Posted by bad_haze
So what is the difference between pixel shaders and pipelines? And do you think there would be a possibility of unlocking extra ones on the x1800 series?
A pixel pipeline is made up of a TMU (texture mapping unit), a pixel shader and a ROP (rasterizer operation processor). So a pixel shader is part of the pipeline. That means that X1900 has 3 pixel shaders per pipe.

Edit: No you cant unlock any more in the X1800.
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post #8 of 12
Why would you say an X1800 XT was a complete miss? It out performed the 7800 GTX quite nicely, you must consider that a complete flop.
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post #9 of 12
Quote:
Originally Posted by CowBlazed
Why would you say an X1800 XT was a complete miss? It out performed the 7800 GTX quite nicely, you must consider that a complete flop.
According the the January issue of Maximum PC, the X1800 XT did not outperform the 7800GTX. It actually lost in most benchmarks. Not to say the ATI card isnt good, but for a time the 7800GTX was the top card out.
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post #10 of 12
Quote:
Originally Posted by CowBlazed
Why would you say an X1800 XT was a complete miss? It out performed the 7800 GTX quite nicely, you must consider that a complete flop.
He didn't say a complete flop... It actually only outperformed the 7800GTX 256 by only a few fps in most games.
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