GeForce GTX 460 1GB vs Radeon R7 250

Intro

Compare all that to the Radeon R7 250, which features GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1150 MHz through a 128-bit bus. It also is comprised of 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 GTX 460 1GB		160 Watts
	Difference: 95 Watts (146%)

Memory Bandwidth

In theory, the GeForce GTX 460 1GB is 57% quicker than the Radeon R7 250 overall, due to its higher bandwidth. (explain)

GeForce GTX 460 1GB		115200 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 41600 (57%)

Texel Rate

The GeForce GTX 460 1GB is a lot (more or less 58%) faster with regards to texture filtering than the Radeon R7 250. (explain)

GeForce GTX 460 1GB		37800 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 13800 (58%)

Pixel Rate

The GeForce GTX 460 1GB will be much (more or less 170%) better at anti-aliasing than the Radeon R7 250, and capable of handling higher resolutions more effectively. (explain)

GeForce GTX 460 1GB		21600 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 13600 (170%)

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 max amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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