GeForce GTX 660 vs Radeon HD 4670 512MB

Intro

Compare that to the Radeon HD 4670 512MB, which features a clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 TAUs, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce GTX 660		140 Watts
	Difference: 70 Watts (100%)

Memory Bandwidth

The GeForce GTX 660 should in theory perform a lot faster than the Radeon HD 4670 512MB in general. (explain)

GeForce GTX 660		144192 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 112192 (351%)

Texel Rate

The GeForce GTX 660 will be much (about 227%) more effective at AF than the Radeon HD 4670 512MB. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 54400 (227%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 is superior to the Radeon HD 4670 512MB, and very much so. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 17520 (292%)

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 (counted in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure 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 video card will be at handling 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 graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.