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Pixel-filling power
I'm inclined to chuck our fill rate table out of the window soon, because it's becoming less relevant as programmable pixel shaders become more prevalent. Still, we'll have a quick look at it here, since it helps illustrate what the Radeon X1650 XT has over the rest of the Radeon X1600 lineup.

Core
clock
(MHz)
Pixels/
clock
Peak
fill rate
(Mpixels/s)
Textures/
clock
Peak
fill rate
(Mtexels/s)
Effective
memory
clock (MHz)
Memory
bus width
(bits)
Peak memory
bandwidth
(GB/s)
Radeon X1650 XT 575 8 4600 8 4600 1350 128 21.6
Radeon X1650 Pro 600 4 2400 4 2400 1400 128 22.4
GeForce 7600 GT 560 8 4480 12 6720 1400 128 22.4
All-In-Wonder X1900 500 16 8000 16 8000 960 256 30.7
Radeon X1800 GTO 500 12 6000 12 6000 1000 256 32.0
GeForce 7800 GT 400 16 6400 20 8000 1000 256 32.0
Radeon X1800 XL 500 16 8000 16 8000 1000 256 32.0
GeForce 7800 GTX 430 16 6880 24 10320 1200 256 38.4
Radeon X1900 GT 575 12 6900 12 6900 1200 256 38.4
GeForce 7900 GS 450 16 7200 20 9000 1320 256 42.2
GeForce 7900 GT 450 16 7200 24 10800 1320 256 42.2
Radeon X1950 Pro 575 12 6900 12 6900 1380 256 44.2
XFX GeForce 7900 GS 480M 480 16 7680 20 9600 1400 256 44.8
GeForce 7950 GT 550 16 8800 24 13200 1400 256 44.8
Radeon X1900 XT 625 16 10000 16 10000 1450 256 46.4
XFX GeForce 7950 GT 570M 570 16 9120 24 13680 1460 256 46.7
Radeon X1800 XT 625 16 10000 16 10000 1500 256 48.0
Radeon X1900 XTX 650 16 10400 16 10400 1550 256 49.6
GeForce 7900 GTX 650 16 10400 24 15600 1600 256 51.2
GeForce 7800 GTX 512 550 16 8800 24 13200 1700 256 54.4
Radeon X1950 XTX 650 16 10400 16 10400 2000 256 64.0
GeForce 7950 GX2 2 * 500 32 16000 48 24000 1200 2 * 256 76.8

Although it has nearly the exact same amount of memory bandwidth as its little brother, the Radeon X1650 Pro, the X1650 XT can paint nearly twice as many pixels with its GPU each second. In fact, the X1650 XT's pixel fill rate surpasses that of the GeForce 7600 GT. The GeForce, however, has more peak texturing capacity.

All of this tech talk doesn't mean much if the cards can't deliver on their theoretical promise, however. This quick synthetic fill rate test checks to see how close they can get.

The X1650 XT can't quite match the GeForce 7600 GT in these tests, but it does get very close to its own peak theoretical throughput when applying multiple textures. For its part, the BFG Tech 7600 GT OC card slightly outperforms the theoretical peak numbers we have in the table above because it's running at higher-than-stock clock speeds. These things are merely academic at the end of the day, though, so let's move on to real games.