GeForce GTX 285 2GB vs Radeon R9 270X

Intro

Compare those specs to the Radeon R9 270X, which comes with core speeds of 1000 MHz on the GPU, and 1400 MHz on the 2048 MB of GDDR5 RAM. It features 1280 SPUs along with 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 270X		180 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 24 Watts (13%)

Memory Bandwidth

In theory, the Radeon R9 270X should perform a bit faster than the GeForce GTX 285 2GB in general. (explain)

Radeon R9 270X		179200 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 20224 (13%)

Texel Rate

The Radeon R9 270X is a lot (approximately 54%) faster with regards to texture filtering than the GeForce GTX 285 2GB. (explain)

Radeon R9 270X		80000 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 28160 (54%)

Pixel Rate

The Radeon R9 270X should be quite a bit (about 54%) faster with regards to anti-aliasing than the GeForce GTX 285 2GB, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 270X		32000 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 11264 (54%)

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 maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. It 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 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be 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 this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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