GeForce GT 320 vs Radeon HD 4650 512MB

Intro

Compare those specs to the Radeon HD 4650 512MB, which uses a 55 nm design. AMD has set the core frequency at 600 MHz. The DDR2 memory works at a frequency of 500 MHz on this particular card. 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)

GeForce GT 320		43 Watts
Radeon HD 4650 512MB		55 Watts
	Difference: 12 Watts (28%)

Memory Bandwidth

The GeForce GT 320 should theoretically be a lot faster than the Radeon HD 4650 512MB overall. (explain)

GeForce GT 320		25280 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 9280 (58%)

Texel Rate

The Radeon HD 4650 512MB should be a lot (about 48%) faster with regards to AF than the GeForce GT 320. (explain)

Radeon HD 4650 512MB		19200 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 6240 (48%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4650 512MB is the winner, but only just. (explain)

Radeon HD 4650 512MB		4800 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 480 (11%)

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 (in units of MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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.