Radeon HD 4750 vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which comes with a clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, 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 M395X		125 Watts
	Difference: 50 Watts (67%)

Memory Bandwidth

The Radeon R9 M395X should in theory perform a lot faster than the Radeon HD 4750 in general. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 4750		51200 MB/sec
	Difference: 108800 (213%)

Texel Rate

The Radeon R9 M395X should be a lot (about 296%) better at AF than the Radeon HD 4750. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 4750		23360 Mtexels/sec
	Difference: 69184 (296%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M395X is superior to the Radeon HD 4750, by a large margin. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 11456 (98%)

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 data (measured in MB per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at 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 chip could possibly record to its local memory per 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 - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.