GeForce GTX 275 - how does it compare
| Graphics cards | GeForce GTX 275 | GeForce GTX 260 | GeForce GTX 285 |
|---|---|---|---|
| Codename |
GT200b | GT200b | GT200b |
| Process (nm) |
55 | 55 | 55 |
| Transistors (mn) |
1,400 | 1,400 | 1,400 |
| GPU clock (MHz) |
633 | 576 | 648 |
| Shader clock (MHz) | 1,404 | 1,242 | 1,476 |
| Memory clock (MHz) | 2,268 |
1,998 | 2,484 |
| Memory sizes (MB) |
896/1,792 |
896 | 1,024 |
| Memory bus width (bits) |
448 | 448 | 512 |
| Shader units | 240 | 216 | 240 |
| ROPs | 28 | 28 | 32 |
| Idle board power (watts) | N/A | N/A | N/A |
| Max board power (watts) | 182 (estimated) | 182 | 182 |
| Etail price (£) | £199+/£239+ | £150 | £299 |
Whereas ATI's gone for a raise-the-clock approach, NVIDIA's faced up to making a cheaper GT200b derivative by looking at both GTX 285 and GTX 260. For a start, GTX 275 is very much from the same family as the other: no nomenclature trickery here.
The 'top-end' of the card is akin to a GeForce GTX 285, as it ships with a full complement of 240 stream processors. What's more, the clock-speeds of 633MHz core, 1,404MHz memory, and 2,276MHz GDDR3 RAM make it tastier than a GeForce GTX 280 in this respect, so more GFLOPs compute power and higher fillrate.
The 'back-end' is very similar to a GeForce GTX 260's, with 28 ROPs connected to a 448-bit-wide memory-bus. Here, it loses out bandwidth when compared to a GeForce GTX 28x card, but it's not a massive disadvantage. A brief look at the architecture suggests that it will benchmark faster than the GeForce GTX 260, obviously, and relatively close to a GTX 285 - more so if the gaming title is shader-limited. Indeed, the design, actually, can be thought of as half a GeForce GTX 295, albeit with faster clocks. We wonder if we'll actually see a GeFore 'GTX 298', comprised of two GeForce GTX 275s.
