Radeon HD 6790 vs Radeon HD 7950

Intro

Compare those specs to the Radeon HD 7950, which features core speeds of 800 MHz on the GPU, and 1250 MHz on the 1536 MB of GDDR5 memory. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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 6790		2150 points
	Difference: 5581 (260%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon HD 7950		200 Watts
	Difference: 50 Watts (33%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7950 should theoretically be a lot better than the Radeon HD 6790 overall. (explain)

Radeon HD 7950		240000 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 105600 (79%)

Texel Rate

The Radeon HD 7950 should be quite a bit (more or less 167%) faster with regards to AF than the Radeon HD 6790. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 56000 (167%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7950 is superior to the Radeon HD 6790, by far. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 12160 (90%)

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 information (counted in megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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