Radeon HD 5830 vs Radeon R9 M275X

Intro

Compare those specs to the Radeon R9 M275X, which features core speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
Radeon HD 5830		175 Watts
	Difference: 125 Watts (250%)

Memory Bandwidth

The Radeon HD 5830, in theory, should perform much faster than the Radeon R9 M275X overall. (explain)

Radeon HD 5830		128000 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The Radeon HD 5830 should be much (about 24%) more effective at anisotropic filtering than the Radeon R9 M275X. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 8800 (24%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M275X is a better choice, though only just barely. (explain)

Radeon R9 M275X		14400 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 1600 (13%)

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 largest amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.