GeForce GTX 285 2GB vs Radeon R9 M290X

Intro

Compare those specs to the Radeon R9 M290X, which comes with GPU core speed of 850 MHz, and 4096 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X		100 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 104 Watts (104%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 2GB should theoretically be just a bit better than the Radeon R9 M290X overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon R9 M290X		153600 MB/sec
	Difference: 5376 (4%)

Texel Rate

The Radeon R9 M290X should be a lot (more or less 31%) better at AF than the GeForce GTX 285 2GB. (explain)

Radeon R9 M290X		68000 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 16160 (31%)

Pixel Rate

The Radeon R9 M290X is a lot (more or less 31%) faster with regards to full screen anti-aliasing than the GeForce GTX 285 2GB, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon R9 M290X		27200 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 6464 (31%)

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 (in units of MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.