Radeon HD 4670 1GB vs Radeon HD 6970

Intro

Compare those specifications to the Radeon HD 6970, which features a clock speed of 880 MHz and a GDDR5 memory frequency of 1375 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
Radeon HD 6970		250 Watts
	Difference: 180 Watts (257%)

Memory Bandwidth

In theory, the Radeon HD 6970 will be 400% quicker than the Radeon HD 4670 1GB in general, because of its higher bandwidth. (explain)

Radeon HD 6970		176000 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 140800 (400%)

Texel Rate

The Radeon HD 6970 will be much (about 252%) more effective at anisotropic filtering than the Radeon HD 4670 1GB. (explain)

Radeon HD 6970		84480 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 60480 (252%)

Pixel Rate

The Radeon HD 6970 should be much (about 369%) faster with regards to FSAA than the Radeon HD 4670 1GB, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 6970		28160 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 22160 (369%)

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 maximum amount of data (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.