Radeon HD 4730 vs Radeon R9 M280X

Intro

Compare that to the Radeon R9 M280X, which makes use of a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory works at a frequency of 1375 MHz on this particular model. It features 896 SPUs as well as 56 Texture Address Units 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 4730		140 Watts
	Difference: 65 Watts (87%)

Memory Bandwidth

In theory, the Radeon R9 M280X will be 53% quicker than the Radeon HD 4730 overall, due to its greater bandwidth. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon HD 4730		57600 MB/sec
	Difference: 30400 (53%)

Texel Rate

The Radeon R9 M280X is much (about 125%) better at AF than the Radeon HD 4730. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 28000 (125%)

Pixel Rate

The Radeon R9 M280X will be quite a bit (approximately 157%) faster with regards to anti-aliasing than the Radeon HD 4730, and also should be capable of handling higher resolutions better. (explain)

Radeon R9 M280X		14400 Mpixels/sec
Radeon HD 4730		5600 Mpixels/sec
	Difference: 8800 (157%)

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 information (measured in MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video 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 amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.