GPU-Z uses a database to identify the cards. If the DB isn't up-to-date, it shows incorrect information (well, clock rates are probably read real-time). Even the original author of the review says that the GPU-Z values are wrong:
"We test used by the test drive version amd_vista_radeonhd_4850_8.50.3_final_certified, in the latest version of the GPU-Z in a comprehensive manner and failed to obtain relevant information, but we can understand that the core and memory frequencies were 625 / 1986MHz."
So 480vs800 SP is still undecided. I would lean on the 800's side though...
so we have weak cards?
gpu-z seems fine for clocks, driver is correct for 4850's, mem bandwidth ok, fillrates are not, do not scale with clockspeed changes.
Last edited by cadaveca; 07-31-2008 at 11:13 AM.
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Foundational Falsehoods of Creationism
Rv770 > 800 Shaders or 480?
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RV770 = 800SPs
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A. The 4870 is priced a third lower than the GTX 260, so there is NO expectation for it to get the same mark.
B. Even if it had similar performance, Vantage has had an Nvidia bias since launch and though that was remedied with the ATI vantage hotfix, you can't rely on Vantage alone for performance benchmarking.
C. 480 or 800, it will be a killer card for the price
The scores arent TOO bad at all, considering what the 4850 can do with voltmods.
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how could they be simpler units? If they were simpler units that did less intructions then ATI would have needed more shaders to achieve that 800 number (as they multiply the number of shaders by the number of instructions it can do basically for the final number), definitely not a simpler shader
http://www.beyond3d.com/content/reviews/16/8
Yes, a shader can be simpler if it is dedicated to a smaller amount of instructions.
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You aren't getting the point, ATI gets its shader count by multiplying the number of shaders by its possible instructions. So for the R600 you got 64*5 shading instructions = 320. Now if the rv770 has 800 shaders, you HAVE TO HAVE either 160 * 5 shading instructions or more shaders. No other possible way for it to happen, otherwise it wouldn't be "800" shaders.
Why not?
Vantage is still really shader limited (3850 > 9600GT) but unfortunately RV670 doesn't have enough TMUs to not get bottlenecked.
RV770's popular TMU number aka 32, should be enough to not be bottlenecked. G80 proved that.
And also, 4850 is heavily bottlenecked by bandwidth. Can't wait for a 2.2Ghz DDR3 version to come, I smell some 9 series slaughter.
Plus, XFastest.com has REAL screenshots of the 4850 in Vantage, see the feature test scores. They confirm 800SPs, and much better scores in the 6 feature tests (more important for me than the overall score)
Last edited by Macadamia; 06-11-2008 at 02:59 AM.
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http://xfastest.com/viewthread.php?t...&extra=&page=1
And yet, it is the FASTEST single GPU in texture fillrate when compared to the Digit life scores.
(RV770 gets higher than the 64TMU G92s, touche)
Last edited by Macadamia; 06-11-2008 at 03:24 AM.
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