GeForce GTX 460 2GB vs Radeon HD 4650 512MB

Intro

Compare those specs to the Radeon HD 4650 512MB, which comes with a core clock speed of 600 MHz and a DDR2 memory speed of 500 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

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GTX 460 2GB		160 Watts
	Difference: 105 Watts (191%)

Memory Bandwidth

The GeForce GTX 460 2GB should theoretically be quite a bit faster than the Radeon HD 4650 512MB in general. (explain)

GeForce GTX 460 2GB		115200 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 99200 (620%)

Texel Rate

The GeForce GTX 460 2GB should be quite a bit (more or less 97%) faster with regards to texture filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 460 2GB		37800 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 18600 (97%)

Pixel Rate

The GeForce GTX 460 2GB will be a lot (approximately 350%) more effective at full screen anti-aliasing than the Radeon HD 4650 512MB, and able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 460 2GB		21600 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 16800 (350%)

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 (in units of megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the 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 write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.