GeForce GTX 560 vs Radeon HD 4650 512MB

Intro

Compare those specs to the Radeon HD 4650 512MB, which uses a 55 nm design. AMD has clocked the core frequency at 600 MHz. The DDR2 memory works at a frequency of 500 MHz on this model. It features 320(64x5) SPUs along with 32 TAUs and 8 Rasterization Operator Units.

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 will be 701% quicker than the Radeon HD 4650 512MB overall, due to 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 should be much (about 136%) more effective at AF 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

If running with high levels of AA is important to you, then the GeForce GTX 560 is the winner, by far. (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 maximum amount of information (in units of MB per second) that can be moved across the external memory interface in a second. It is worked out 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 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 are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in a 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 - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.