Radeon HD 4830 512MB vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which comes with a GPU core clock speed of 900 MHz, and 4096 MB of GDDR5 RAM set to run at 1375 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon HD 4830 512MB		95 Watts
	Difference: 20 Watts (27%)

Memory Bandwidth

Theoretically, the Radeon R9 M280X should perform much faster than the Radeon HD 4830 512MB in general. (explain)

Radeon R9 M280X		88000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 30400 (53%)

Texel Rate

The Radeon R9 M280X will be quite a bit (approximately 174%) faster with regards to texture filtering than the Radeon HD 4830 512MB. (explain)

Radeon R9 M280X		50400 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 32000 (174%)

Pixel Rate

The Radeon R9 M280X is much (more or less 57%) more effective at FSAA than the Radeon HD 4830 512MB, and also capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M280X		14400 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 5200 (57%)

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 transferred over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, 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 most pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.