GeForce GTX 560 vs Radeon HD 4650 512MB

Intro

Compare all of that to the Radeon HD 4650 512MB, which makes use of a 55 nm design. AMD has set the core frequency at 600 MHz. The DDR2 RAM is set to run at a speed of 500 MHz on this specific model. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 ROPs.

Display Graphs

Hide Graphs

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

Theoretically, the GeForce GTX 560 should be much faster than the Radeon HD 4650 512MB overall. (explain)

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

Texel Rate

The GeForce GTX 560 is much (more or less 136%) more effective at texture 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

If running with lots of anti-aliasing is important to you, then the GeForce GTX 560 is a better choice, 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 largest amount of information (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that can be processed per second. This 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many 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.