Radeon HD 6750 1GB vs Radeon R9 M290X

Intro

Compare those specifications to the Radeon R9 M290X, which features a core clock speed of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1280 SPUs, 80 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon R9 M290X		100 Watts
	Difference: 14 Watts (16%)

Memory Bandwidth

In theory, the Radeon R9 M290X will be 140% quicker than the Radeon HD 6750 1GB overall, due to its higher data rate. (explain)

Radeon R9 M290X		153600 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 89600 (140%)

Texel Rate

The Radeon R9 M290X should be quite a bit (approximately 161%) better at AF than the Radeon HD 6750 1GB. (explain)

Radeon R9 M290X		68000 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 41900 (161%)

Pixel Rate

The Radeon R9 M290X should be much (about 134%) more effective at full screen anti-aliasing than the Radeon HD 6750 1GB, and will be able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 15600 (134%)

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 (counted in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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.