Geforce GTX 680 vs Radeon HD 4670 1GB

Intro

Compare those specifications to the Radeon HD 4670 1GB, which features a core clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1100 MHz. It also uses a 128-bit bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
Geforce GTX 680		195 Watts
	Difference: 125 Watts (179%)

Memory Bandwidth

The Geforce GTX 680 should theoretically perform a lot faster than the Radeon HD 4670 1GB in general. (explain)

Geforce GTX 680		192256 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 157056 (446%)

Texel Rate

The Geforce GTX 680 should be much (more or less 437%) better at AF than the Radeon HD 4670 1GB. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 104768 (437%)

Pixel Rate

The Geforce GTX 680 should be much (more or less 437%) more effective at FSAA than the Radeon HD 4670 1GB, and also should be able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 26192 (437%)

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 (counted in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.