GeForce GTS 450 1GB vs Radeon HD 5670

Intro

Compare that to the Radeon HD 5670, which comes with core speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 45 Watts (74%)

Memory Bandwidth

Performance-wise, the Radeon HD 5670 should in theory be a little bit superior to the GeForce GTS 450 1GB overall. (explain)

Radeon HD 5670		64000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 6272 (11%)

Texel Rate

The GeForce GTS 450 1GB is much (about 62%) faster with regards to anisotropic filtering than the Radeon HD 5670. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 9556 (62%)

Pixel Rate

The GeForce GTS 450 1GB will be a lot (approximately 102%) better at FSAA than the Radeon HD 5670, and should be able to handle higher resolutions better. (explain)

GeForce GTS 450 1GB		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 largest amount of information (in units of MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.