Radeon HD 6770 vs Radeon R9 M290X

Intro

Compare all that to the Radeon R9 M290X, which has a clock frequency of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It features 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M290X		100 Watts
Radeon HD 6770		108 Watts
	Difference: 8 Watts (8%)

Memory Bandwidth

In theory, the Radeon R9 M290X should perform quite a bit faster than the Radeon HD 6770 overall. (explain)

Radeon R9 M290X		153600 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 86400 (129%)

Texel Rate

The Radeon R9 M290X should be quite a bit (approximately 89%) more effective at texture filtering than the Radeon HD 6770. (explain)

Radeon R9 M290X		68000 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 32000 (89%)

Pixel Rate

The Radeon R9 M290X should be a lot (about 89%) more effective at full screen anti-aliasing than the Radeon HD 6770, and also will be able to handle higher resolutions better. (explain)

Radeon R9 M290X		27200 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 12800 (89%)

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 maximum amount of data (counted in MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its 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 card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.