GeForce GTX 460 (OEM) vs Radeon HD 4650 1GB

Intro

Compare those specifications to the Radeon HD 4650 1GB, which has a core clock speed of 600 MHz and a GDDR3 memory frequency of 700 MHz. It also features 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 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

Performance-wise, the GeForce GTX 460 (OEM) should theoretically be quite a bit superior to the Radeon HD 4650 1GB overall. (explain)

GeForce GTX 460 (OEM)		108800 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 86400 (386%)

Texel Rate

The GeForce GTX 460 (OEM) is quite a bit (more or less 90%) better at texture filtering than the Radeon HD 4650 1GB. (explain)

GeForce GTX 460 (OEM)		36400 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 17200 (90%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 460 (OEM) is a better choice, and very much so. (explain)

GeForce GTX 460 (OEM)		20800 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 16000 (333%)

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 (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many 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.