Games and bandwidth

[CarstenS]

The bandwidth "requirement" for the 06 ST fill rate test is pretty clear cut, if you test it out:

G80 @ 1280 x 1024
Core/RAM	ST	Theor	%Diff
576 / 1000	6905	6912	-0.1%
576 / 950	6905	6912	-0.1%
576 / 900	6905	6912	-0.1%
576 / 850	6903	6912	-0.1%
576 / 800	6898	6912	-0.2%
576 / 750	6883	6912	-0.4%
576 / 700	6725	6912	-2.7%
576 / 650	6342	6912	-8.2%
[B]576 / 600	5877	6912	-15.0%[/B]
576 / 550	5354	6912	-22.5%
576 / 500	4939	6912	-28.5%
576 / 450	4421	6912	-36.0%

It would be nice to see what the drop off values are like with chips that have more blenders than the G80. I wish more review sites would concentrate on analysing one variable over one test, rather than doing several over numerous.

[my highlighting]
That's as high as i can get my GTX280 as far as bytes per pixel is concerned with default ROP-Domain of 700 MHz. At 8,02 bbp (e700/m1404), I'm getting about 83 percent blend efficiency.

Lowering the e-clk to 500 MHz yielding a neat 16 GPix/s of INT8 blending, I can get almost 98 percent utilization.

So, wrt to fullspeed blending - even in INT8-case - GT200 seems to be quite BW starved. If need be, I can post the whole results.