Pixel-filling power
The table below shows a few key specs for the Radeon X1950 Pro and a number of current graphics cards. By no means is this table a complete representation of a graphics card's capabilities, though. It's simply a look at the theoretical peak pixel painting and texturing power of a card—simple stuff that doesn't include pixel shader math—alongside memory bandwidth.
| 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 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 |
When it built the Radeon X1000 series, ATI decided to concentrate on pixel shader power rather than raw fill rate or texturing capability—hence the 12 texture units and 36 pixel shader processors on the RV570. As a result, the X1950 Pro's peak pixel and texel fill rates are lower than its most direct competitor, the GeForce 7900 GS. The X1950 Pro is very competitive in terms of memory bandwidth, though, and that probably matters most.
The quick synthetic fill rate benchmarks below will test how closely the theoretical peaks match up with what the cards can deliver.
The X1950 Pro performs about as expected here. These numbers won't tell us too much about what kind of performance to expect in today's shader-laden games, though, so let's move on to the games themselves.
