Radeon HD 6770 vs Radeon HD 7950 3GB

Intro

Compare those specifications to the Radeon HD 7950 3GB, which makes use of a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this specific card. It features 1792 SPUs along with 112 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 92 Watts (85%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB should perform quite a bit faster than the Radeon HD 6770 overall. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 172800 (257%)

Texel Rate

The Radeon HD 7950 3GB should be a lot (about 149%) more effective at anisotropic filtering than the Radeon HD 6770. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 53600 (149%)

Pixel Rate

The Radeon HD 7950 3GB should be a lot (about 78%) more effective at anti-aliasing than the Radeon HD 6770, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 11200 (78%)

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 MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.