GeForce GTS 450 vs Radeon HD 5670

Intro

Compare that to the Radeon HD 5670, which makes use of a 40 nm design. AMD has set the core speed at 775 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this particular model. It features 400(80x5) SPUs as well as 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce GTS 450		106 Watts
	Difference: 45 Watts (74%)

Memory Bandwidth

The Radeon HD 5670 should theoretically be a small bit faster than the GeForce GTS 450 in general. (explain)

Radeon HD 5670		64000 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 6272 (11%)

Texel Rate

The GeForce GTS 450 should be quite a bit (more or less 62%) faster with regards to AF than the Radeon HD 5670. (explain)

GeForce GTS 450		25056 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 9556 (62%)

Pixel Rate

The GeForce GTS 450 should be quite a bit (about 102%) more effective at anti-aliasing than the Radeon HD 5670, and also should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTS 450		12528 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 6328 (102%)

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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.