GeForce GTX 285 2GB vs Radeon R7 250

Intro

Compare all that to the Radeon R7 250, which has a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 memory set to run at 1150 MHz through a 128-bit bus. It also is comprised of 384 SPUs, 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 GTX 285 2GB		204 Watts
	Difference: 139 Watts (214%)

Memory Bandwidth

The GeForce GTX 285 2GB, in theory, should be much faster than the Radeon R7 250 in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 85376 (116%)

Texel Rate

The GeForce GTX 285 2GB will be a lot (approximately 116%) more effective at anisotropic filtering than the Radeon R7 250. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 27840 (116%)

Pixel Rate

The GeForce GTX 285 2GB should be quite a bit (more or less 159%) faster with regards to AA than the Radeon R7 250, and will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 12736 (159%)

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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's 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 per second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.