Radeon HD 6770 vs Radeon HD 6970

Intro

Compare that to the Radeon HD 6970, which has GPU core speed of 880 MHz, and 2048 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also features 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6970		3470 points
Radeon HD 6770		1520 points
	Difference: 1950 (128%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
Radeon HD 6970		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

The Radeon HD 6970, in theory, should perform quite a bit faster than the Radeon HD 6770 overall. (explain)

Radeon HD 6970		176000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 108800 (162%)

Texel Rate

The Radeon HD 6970 should be quite a bit (more or less 135%) better at AF than the Radeon HD 6770. (explain)

Radeon HD 6970		84480 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 48480 (135%)

Pixel Rate

The Radeon HD 6970 is much (about 96%) faster with regards to anti-aliasing than the Radeon HD 6770, and will be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 6970		28160 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 13760 (96%)

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 information (in units of megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.