Radeon HD 4670 1GB vs Radeon HD 6950

Intro

Compare those specifications to the Radeon HD 6950, which makes use of a 40 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this particular card. It features 1408 SPUs along with 88 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
Radeon HD 6950		200 Watts
	Difference: 130 Watts (186%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 should be a lot faster than the Radeon HD 4670 1GB overall. (explain)

Radeon HD 6950		160000 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 124800 (355%)

Texel Rate

The Radeon HD 6950 will be a lot (approximately 193%) faster with regards to texture filtering than the Radeon HD 4670 1GB. (explain)

Radeon HD 6950		70400 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 46400 (193%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6950 is the winner, and very much so. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 19600 (327%)

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 data (measured in MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are 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 higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.