GeForce GTS 450 1GB vs GeForce GTX 285 1GB

Intro

Compare those specs to the GeForce GTX 285 1GB, which has a clock frequency of 648 MHz and a GDDR3 memory speed of 1242 MHz. It also features a 512-bit memory bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 98 Watts (92%)

Memory Bandwidth

In theory, the GeForce GTX 285 1GB is 175% faster than the GeForce GTS 450 1GB overall, because of its greater bandwidth. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 101248 (175%)

Texel Rate

The GeForce GTX 285 1GB will be much (more or less 107%) more effective at texture filtering than the GeForce GTS 450 1GB. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 26784 (107%)

Pixel Rate

The GeForce GTX 285 1GB is quite a bit (about 66%) faster with regards to FSAA than the GeForce GTS 450 1GB, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 8208 (66%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.