Geforce GTX 680 vs Radeon HD 4670 1GB

Intro

Compare all that to the Radeon HD 4670 1GB, which comes with a clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1100 MHz. It also uses a 128-bit memory bus, and uses a 55 nm design. It is comprised of 320(64x5) SPUs, 32 TAUs, 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, in theory, should be much 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 quite a bit (about 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 will be quite a bit (more or less 437%) faster with regards to FSAA than the Radeon HD 4670 1GB, and capable of handling higher resolutions while still performing well. (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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output 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 get to the maximum fill rate.