GeForce GTX 460 1GB vs Radeon HD 4670 512MB

Intro

Compare those specifications to the Radeon HD 4670 512MB, which features a clock frequency of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB		70 Watts
GeForce GTX 460 1GB		160 Watts
	Difference: 90 Watts (129%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 460 1GB should in theory be quite a bit superior to the Radeon HD 4670 512MB overall. (explain)

GeForce GTX 460 1GB		115200 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 83200 (260%)

Texel Rate

The GeForce GTX 460 1GB should be a lot (more or less 58%) better at anisotropic filtering than the Radeon HD 4670 512MB. (explain)

GeForce GTX 460 1GB		37800 Mtexels/sec
Radeon HD 4670 512MB		24000 Mtexels/sec
	Difference: 13800 (58%)

Pixel Rate

The GeForce GTX 460 1GB will be quite a bit (about 260%) more effective at anti-aliasing than the Radeon HD 4670 512MB, and also should be capable of handling higher resolutions better. (explain)

GeForce GTX 460 1GB		21600 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 15600 (260%)

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 max amount of data (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the 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 graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). 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.