GeForce 9800 GT 512MB 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 RAM. It features 384 SPUs along with 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 9800 GT 512MB		105 Watts
	Difference: 40 Watts (62%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 250 is 28% faster than the GeForce 9800 GT 512MB overall, due to its greater bandwidth. (explain)

Radeon R7 250		73600 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 16000 (28%)

Texel Rate

The GeForce 9800 GT 512MB will be much (more or less 40%) faster with regards to AF than the Radeon R7 250. (explain)

GeForce 9800 GT 512MB		33600 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 9600 (40%)

Pixel Rate

The GeForce 9800 GT 512MB should be a bit (approximately 20%) better at full screen anti-aliasing than the Radeon R7 250, and also should be capable of handling higher screen resolutions more effectively. (explain)

GeForce 9800 GT 512MB		9600 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 1600 (20%)

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 data (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.