GeForce 8800 GTS (G80) 320MB vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which has a clock frequency of 1000 MHz and a GDDR5 memory speed of 1150 MHz. It also features a 128-bit bus, and uses a 28 nm design. It features 384 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250		65 Watts
GeForce 8800 GTS (G80) 320MB		143 Watts
	Difference: 78 Watts (120%)

Memory Bandwidth

The Radeon R7 250, in theory, should perform a bit faster than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon R7 250		73600 MB/sec
GeForce 8800 GTS (G80) 320MB		63360 MB/sec
	Difference: 10240 (16%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB is just a bit (about 3%) better at anisotropic filtering than the Radeon R7 250. (explain)

GeForce 8800 GTS (G80) 320MB		24624 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 624 (3%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 8800 GTS (G80) 320MB is the winner, by a large margin. (explain)

GeForce 8800 GTS (G80) 320MB		10260 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 2260 (28%)

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 information (measured in megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.