GeForce GTX 275 vs Radeon R9 270X

Intro

Compare all that to the Radeon R9 270X, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM works at a frequency of 1400 MHz on this specific model. It features 1280 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X		180 Watts
GeForce GTX 275		219 Watts
	Difference: 39 Watts (22%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 270X should be 41% quicker than the GeForce GTX 275 overall, because of its greater bandwidth. (explain)

Radeon R9 270X		179200 MB/sec
GeForce GTX 275		127008 MB/sec
	Difference: 52192 (41%)

Texel Rate

The Radeon R9 270X will be a lot (approximately 58%) better at texture filtering than the GeForce GTX 275. (explain)

Radeon R9 270X		80000 Mtexels/sec
GeForce GTX 275		50640 Mtexels/sec
	Difference: 29360 (58%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 270X is superior to the GeForce GTX 275, by a large margin. (explain)

Radeon R9 270X		32000 Mpixels/sec
GeForce GTX 275		17724 Mpixels/sec
	Difference: 14276 (81%)

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 max amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher 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 a second.

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