Radeon HD 4750 vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which uses a 28 nm design. AMD has clocked the core frequency at 723 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this particular model. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

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

As far as performance goes, the Radeon R9 M395X should in theory be quite a bit better than the Radeon HD 4750 overall. (explain)

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

Texel Rate

The Radeon R9 M395X is a lot (about 296%) more effective 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

The Radeon R9 M395X is a lot (about 98%) better at AA than the Radeon HD 4750, and also should be able to handle higher resolutions without slowing down too much. (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: Bandwidth is the max amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can 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 ROPs by the the card's clock speed. 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.