Radeon HD 4830 512MB vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which comes with GPU core speed of 750 MHz, and 4096 MB of GDDR5 RAM set to run at 1375 MHz through a 256-bit bus. It also features 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB		95 Watts
Radeon R9 M295X		125 Watts
	Difference: 30 Watts (32%)

Memory Bandwidth

The Radeon R9 M295X, in theory, should perform quite a bit faster than the Radeon HD 4830 512MB overall. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 118400 (206%)

Texel Rate

The Radeon R9 M295X should be quite a bit (approximately 422%) more effective at anisotropic filtering than the Radeon HD 4830 512MB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 77600 (422%)

Pixel Rate

The Radeon R9 M295X is much (approximately 161%) more effective at FSAA than the Radeon HD 4830 512MB, and capable of handling higher screen resolutions better. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 14800 (161%)

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 largest amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.