Radeon HD 6750 1GB vs Radeon HD 7950

Intro

Compare all that 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

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon HD 7950		200 Watts
	Difference: 114 Watts (133%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7950 should theoretically be much better than the Radeon HD 6750 1GB in general. (explain)

Radeon HD 7950		240000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 176000 (275%)

Texel Rate

The Radeon HD 7950 will be a lot (approximately 243%) better at anisotropic filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 63500 (243%)

Pixel Rate

The Radeon HD 7950 is much (approximately 121%) faster with regards to AA than the Radeon HD 6750 1GB, and should be capable of handling higher screen resolutions better. (explain)

Radeon HD 7950		25600 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 14000 (121%)

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 data (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the 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 the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.