GeForce GTX 560 vs Radeon HD 4650 1GB

Intro

Compare all of that to the Radeon HD 4650 1GB, which uses a 55 nm design. AMD has set the core speed at 600 MHz. The GDDR3 memory is set to run at a speed of 700 MHz on this specific model. It features 320(64x5) SPUs along with 32 TAUs 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 560		150 Watts
	Difference: 95 Watts (173%)

Memory Bandwidth

Performance-wise, the GeForce GTX 560 should in theory be a lot superior to the Radeon HD 4650 1GB in general. (explain)

GeForce GTX 560		128128 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 105728 (472%)

Texel Rate

The GeForce GTX 560 should be a lot (about 136%) better at AF than the Radeon HD 4650 1GB. (explain)

GeForce GTX 560		45360 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 26160 (136%)

Pixel Rate

The GeForce GTX 560 should be much (more or less 440%) better at FSAA than the Radeon HD 4650 1GB, and able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 560		25920 Mpixels/sec
Radeon HD 4650 1GB		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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If 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 high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.