Radeon HD 7950 vs Radeon HD 7970

Intro

Compare all of that to the Radeon HD 7970, which features GPU clock speed of 925 MHz, and 3072 MB of GDDR5 RAM running at 1375 MHz through a 384-bit bus. It also is comprised of 2048 SPUs, 128 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 7970		8225 points
Radeon HD 7950		7731 points
	Difference: 494 (6%)

Ethereum Mining Hash Rate

Radeon HD 7950		21 Mh/s
Radeon HD 7970		21 Mh/s
	Difference: 0 (0%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950		200 Watts
Radeon HD 7970		250 Watts
	Difference: 50 Watts (25%)

Memory Bandwidth

The Radeon HD 7970 should in theory perform a small bit faster than the Radeon HD 7950 in general. (explain)

Radeon HD 7970		264000 MB/sec
Radeon HD 7950		240000 MB/sec
	Difference: 24000 (10%)

Texel Rate

The Radeon HD 7970 will be quite a bit (more or less 32%) faster with regards to AF than the Radeon HD 7950. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 28800 (32%)

Pixel Rate

The Radeon HD 7970 should be just a bit (more or less 16%) more effective at FSAA than the Radeon HD 7950, and also should be able to handle higher screen resolutions better. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 4000 (16%)

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 (counted in MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high 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 texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.