Radeon HD 6770 vs Radeon HD 7950

Intro

Compare those specifications to the Radeon HD 7950, which uses a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory works at a speed of 1250 MHz on this model. It features 1792 SPUs as well as 112 TAUs and 32 Rasterization Operator 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 7950		7731 points
Radeon HD 6770		1520 points
	Difference: 6211 (409%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon HD 7950 should perform much faster than the Radeon HD 6770 in general. (explain)

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

Texel Rate

The Radeon HD 7950 is a lot (about 149%) faster with regards to AF than the Radeon HD 6770. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7950 is the winner, and very much so. (explain)

Radeon HD 7950		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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. 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 fill 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 reach the maximum fill rate.