Radeon HD 7750 vs Radeon R9 M290X

Intro

Compare all that to the Radeon R9 M290X, which uses a 28 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 memory works at a speed of 1200 MHz on this particular card. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon R9 M290X		100 Watts
	Difference: 45 Watts (82%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M290X is 113% faster than the Radeon HD 7750 in general, because of its greater data rate. (explain)

Radeon R9 M290X		153600 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon R9 M290X will be a lot (more or less 166%) faster with regards to anisotropic filtering than the Radeon HD 7750. (explain)

Radeon R9 M290X		68000 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 42400 (166%)

Pixel Rate

The Radeon R9 M290X is much (about 113%) more effective at full screen anti-aliasing than the Radeon HD 7750, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 14400 (113%)

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 data (in units of megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If 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 texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.