GeForce GTX 465 vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which comes with a clock frequency of 1000 MHz and a GDDR5 memory speed of 1150 MHz. It also uses a 128-bit bus, and makes use of 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 GTX 465		200 Watts
	Difference: 135 Watts (208%)

Memory Bandwidth

Performance-wise, the GeForce GTX 465 should theoretically be quite a bit superior to the Radeon R7 250 overall. (explain)

GeForce GTX 465		102592 MB/sec
Radeon R7 250		73600 MB/sec
	Difference: 28992 (39%)

Texel Rate

The GeForce GTX 465 is a bit (about 11%) better at anisotropic filtering than the Radeon R7 250. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon R7 250		24000 Mtexels/sec
	Difference: 2708 (11%)

Pixel Rate

The GeForce GTX 465 should be a lot (approximately 143%) faster with regards to anti-aliasing than the Radeon R7 250, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon R7 250		8000 Mpixels/sec
	Difference: 11424 (143%)

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 maximum amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.