Radeon HD 6970 vs Radeon R9 M265X

Intro

Compare all that to the Radeon R9 M265X, which features a clock frequency of 575 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 6970 should in theory be much superior to the Radeon R9 M265X overall. (explain)

Radeon HD 6970		176000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 104000 (144%)

Texel Rate

The Radeon HD 6970 will be a lot (approximately 267%) more effective at anisotropic filtering than the Radeon R9 M265X. (explain)

Radeon HD 6970		84480 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 61480 (267%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6970 is superior to the Radeon R9 M265X, by a large margin. (explain)

Radeon HD 6970		28160 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 18960 (206%)

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 largest amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at 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 the graphics card can 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 clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.