GeForce GTX 460 vs Radeon HD 4650 1GB

Intro

Compare that to the Radeon HD 4650 1GB, which features a clock speed of 600 MHz and a GDDR3 memory speed of 700 MHz. It also makes use of a 128-bit memory bus, and makes use of a 55 nm design. It is comprised 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 4650 1GB		55 Watts
GeForce GTX 460		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

In theory, the GeForce GTX 460 should be much faster than the Radeon HD 4650 1GB in general. (explain)

GeForce GTX 460		86400 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 64000 (286%)

Texel Rate

The GeForce GTX 460 will be much (approximately 97%) faster with regards to texture filtering than the Radeon HD 4650 1GB. (explain)

GeForce GTX 460		37800 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 18600 (97%)

Pixel Rate

The GeForce GTX 460 should be quite a bit (more or less 238%) faster with regards to AA than the Radeon HD 4650 1GB, and also able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 460		16200 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 11400 (238%)

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 max amount of information (measured in MB per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card 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 sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output 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 potential to reach the max fill rate.