Radeon HD 4670 512MB vs Radeon HD 6950

Intro

Compare those specifications to the Radeon HD 6950, which comes with core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 1408 SPUs along with 88 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
Radeon HD 6950		200 Watts
	Difference: 130 Watts (186%)

Memory Bandwidth

In theory, the Radeon HD 6950 should be 400% quicker than the Radeon HD 4670 512MB in general, because of its higher data rate. (explain)

Radeon HD 6950		160000 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 128000 (400%)

Texel Rate

The Radeon HD 6950 should be quite a bit (about 193%) more effective at texture filtering than the Radeon HD 4670 512MB. (explain)

Radeon HD 6950		70400 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 46400 (193%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6950 is superior to the Radeon HD 4670 512MB, and very much so. (explain)

Radeon HD 6950		25600 Mpixels/sec
Radeon HD 4670 512MB		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 largest amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out 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 graphics 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 graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.