Radeon HD 6570 (OEM) 2GB vs Radeon HD 6950 2GB

Intro

Compare all that to the Radeon HD 6950 2GB, which features a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It is made up of 1408 SPUs, 88 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB		50 Watts
Radeon HD 6950 2GB		200 Watts
	Difference: 150 Watts (300%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6950 2GB should in theory be much superior to the Radeon HD 6570 (OEM) 2GB overall. (explain)

Radeon HD 6950 2GB		160000 MB/sec
Radeon HD 6570 (OEM) 2GB		64000 MB/sec
	Difference: 96000 (150%)

Texel Rate

The Radeon HD 6950 2GB is a lot (approximately 351%) more effective at AF than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
	Difference: 54800 (351%)

Pixel Rate

The Radeon HD 6950 2GB will be much (about 392%) faster with regards to full screen anti-aliasing than the Radeon HD 6570 (OEM) 2GB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
	Difference: 20400 (392%)

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 max amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at 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 that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.