GeForce 8800 GTS (G80) 640MB vs Radeon R7 250

Intro

Compare those specs to the Radeon R7 250, which features core clock speeds of 1000 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 memory. It features 384 SPUs as well as 24 TAUs 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) 640MB		143 Watts
	Difference: 78 Watts (120%)

Memory Bandwidth

The Radeon R7 250, in theory, should perform a little bit faster than the GeForce 8800 GTS (G80) 640MB overall. (explain)

Radeon R7 250		73600 MB/sec
GeForce 8800 GTS (G80) 640MB		63360 MB/sec
	Difference: 10240 (16%)

Texel Rate

The GeForce 8800 GTS (G80) 640MB should be a small bit (about 3%) better at AF than the Radeon R7 250. (explain)

GeForce 8800 GTS (G80) 640MB		24624 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 624 (3%)

Pixel Rate

The GeForce 8800 GTS (G80) 640MB should be much (about 28%) better at AA than the Radeon R7 250, and also able to handle higher screen resolutions more effectively. (explain)

GeForce 8800 GTS (G80) 640MB		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 largest amount of information (in units of megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.