GeForce GTX 275 vs Radeon R7 250X

Intro

Compare that to the Radeon R7 250X, which features GPU clock speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X		95 Watts
GeForce GTX 275		219 Watts
	Difference: 124 Watts (131%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 275 is 76% quicker than the Radeon R7 250X overall, because of its higher bandwidth. (explain)

GeForce GTX 275		127008 MB/sec
Radeon R7 250X		72000 MB/sec
	Difference: 55008 (76%)

Texel Rate

The GeForce GTX 275 will be a lot (more or less 27%) more effective at AF than the Radeon R7 250X. (explain)

GeForce GTX 275		50640 Mtexels/sec
Radeon R7 250X		40000 Mtexels/sec
	Difference: 10640 (27%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 275 is superior to the Radeon R7 250X, though only just barely. (explain)

GeForce GTX 275		17724 Mpixels/sec
Radeon R7 250X		16000 Mpixels/sec
	Difference: 1724 (11%)

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 moved past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 are applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.