GeForce GTX 660 vs Radeon HD 4670 1GB

Intro

Compare those specs to the Radeon HD 4670 1GB, which has a clock frequency of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory speed of 1100 MHz. It also features a 128-bit bus, and makes use of a 55 nm design. It features 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 660		140 Watts
	Difference: 70 Watts (100%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 660 should theoretically be much superior to the Radeon HD 4670 1GB overall. (explain)

GeForce GTX 660		144192 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 108992 (310%)

Texel Rate

The GeForce GTX 660 will be a lot (about 227%) faster with regards to anisotropic filtering than the Radeon HD 4670 1GB. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 54400 (227%)

Pixel Rate

The GeForce GTX 660 should be a lot (more or less 292%) faster with regards to anti-aliasing than the Radeon HD 4670 1GB, and capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon HD 4670 1GB		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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.