Radeon HD 4750 vs Radeon R9 M295X

Intro

Compare all of that to the Radeon R9 M295X, which has a clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is made up of 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 4750		75 Watts
Radeon R9 M295X		125 Watts
	Difference: 50 Watts (67%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M295X will be 244% faster than the Radeon HD 4750 in general, due to its greater bandwidth. (explain)

Radeon R9 M295X		176000 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 124800 (244%)

Texel Rate

The Radeon R9 M295X is a lot (about 311%) more effective at anisotropic filtering than the Radeon HD 4750. (explain)

Radeon R9 M295X		96000 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 72640 (311%)

Pixel Rate

The Radeon R9 M295X is a lot (about 105%) better at FSAA than the Radeon HD 4750, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 M295X		24000 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 12320 (105%)

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 (in units of MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better 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 per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. 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 lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.