GeForce GTX 285 2GB vs Radeon R9 M275X

Intro

Compare those specs to the Radeon R9 M275X, which makes use of a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 RAM runs at a speed of 1125 MHz on this model. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 154 Watts (308%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 2GB should perform a lot faster than the Radeon R9 M275X overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 86976 (121%)

Texel Rate

The GeForce GTX 285 2GB will be much (about 44%) faster with regards to anisotropic filtering than the Radeon R9 M275X. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 15840 (44%)

Pixel Rate

The GeForce GTX 285 2GB is much (about 44%) more effective at anti-aliasing than the Radeon R9 M275X, and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 6336 (44%)

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 data (counted in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units 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 is also dependant 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.