GeForce GTX 560 vs Radeon HD 4650 512MB

Intro

Compare those specifications to the Radeon HD 4650 512MB, which features GPU core speed of 600 MHz, and 512 MB of DDR2 RAM set to run at 500 MHz through a 128-bit bus. It also is made up of 320(64x5) SPUs, 32 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GTX 560		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

In theory, the GeForce GTX 560 should be 701% quicker than the Radeon HD 4650 512MB overall, because of its higher data rate. (explain)

GeForce GTX 560		128128 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 112128 (701%)

Texel Rate

The GeForce GTX 560 is a lot (more or less 136%) faster with regards to anisotropic filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 560		45360 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 26160 (136%)

Pixel Rate

The GeForce GTX 560 will be much (more or less 440%) more effective at FSAA than the Radeon HD 4650 512MB, and will be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 560		25920 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 21120 (440%)

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 largest amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.