Radeon HD 5830 vs Radeon R9 M280X

Intro

Compare all that to the Radeon R9 M280X, which has a core clock frequency of 900 MHz and a GDDR5 memory speed of 1375 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It features 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon HD 5830		175 Watts
	Difference: 100 Watts (133%)

Memory Bandwidth

The Radeon HD 5830 should theoretically perform a lot faster than the Radeon R9 M280X in general. (explain)

Radeon HD 5830		128000 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 40000 (45%)

Texel Rate

The Radeon R9 M280X will be a little bit (about 13%) more effective at anisotropic filtering than the Radeon HD 5830. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon HD 5830		44800 Mtexels/sec
	Difference: 5600 (13%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M280X is superior to the Radeon HD 5830, though only just barely. (explain)

Radeon R9 M280X		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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 in one second. This figure 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 graphics 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 number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.