Radeon HD 7750 vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which makes use of a 28 nm design. AMD has clocked the core frequency at 723 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this card. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon R9 M390X		125 Watts
	Difference: 70 Watts (127%)

Memory Bandwidth

In theory, the Radeon R9 M390X should perform a lot faster than the Radeon HD 7750 in general. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 88000 (122%)

Texel Rate

The Radeon R9 M390X should be much (approximately 262%) better at texture filtering than the Radeon HD 7750. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 66944 (262%)

Pixel Rate

The Radeon R9 M390X is a lot (more or less 81%) better at anti-aliasing than the Radeon HD 7750, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 10336 (81%)

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 max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, 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 maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.