Radeon HD 7790 vs Radeon HD 7950 3GB

Intro

Compare those specifications to the Radeon HD 7950 3GB, which comes with a clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 384-bit bus, and uses a 28 nm design. It is comprised of 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 115 Watts (135%)

Memory Bandwidth

The Radeon HD 7950 3GB should theoretically be quite a bit faster than the Radeon HD 7790 in general. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 144000 (150%)

Texel Rate

The Radeon HD 7950 3GB is a lot (approximately 60%) faster with regards to texture filtering than the Radeon HD 7790. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 33600 (60%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7950 3GB is the winner, and very much so. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 9600 (60%)

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 data (counted in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video 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 amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.