GeForce GTS 250 512MB vs Radeon HD 5750 1GB

Intro

Compare those specifications to the Radeon HD 5750 1GB, which features clock speeds of 700 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 RAM. It features 720(144x5) SPUs as well as 36 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 59 Watts (69%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5750 1GB should be a bit faster than the GeForce GTS 250 512MB overall. (explain)

Radeon HD 5750 1GB		73600 MB/sec
GeForce GTS 250 512MB		70400 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce GTS 250 512MB should be a lot (about 87%) better at texture filtering than the Radeon HD 5750 1GB. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 22032 (87%)

Pixel Rate

The GeForce GTS 250 512MB is just a bit (about 5%) faster with regards to AA than the Radeon HD 5750 1GB, and capable of handling higher screen resolutions better. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 608 (5%)

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 (in units of megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.