Radeon HD 6750 vs Radeon HD 7970

Intro

Compare those specifications to the Radeon HD 7970, which features GPU core speed of 925 MHz, and 3072 MB of GDDR5 memory set to run at 1375 MHz through a 384-bit bus. It also features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 7970		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7970 should theoretically be much superior to the Radeon HD 6750 overall. (explain)

Radeon HD 7970		264000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 200000 (313%)

Texel Rate

The Radeon HD 7970 is much (approximately 354%) faster with regards to texture filtering than the Radeon HD 6750. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 92300 (354%)

Pixel Rate

The Radeon HD 7970 should be quite a bit (approximately 155%) faster with regards to AA than the Radeon HD 6750, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 7970		29600 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 18000 (155%)

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 maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.