GeForce GT 320 vs Radeon HD 4730

Intro

Compare all that to the Radeon HD 4730, which comes with a core clock frequency of 700 MHz and a GDDR5 memory speed of 900 MHz. It also features a 128-bit bus, and makes use of a 55 nm design. It is comprised of 640(128x5) SPUs, 32 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 4730		140 Watts
	Difference: 97 Watts (226%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4730 should be 128% quicker than the GeForce GT 320 in general, because of its higher bandwidth. (explain)

Radeon HD 4730		57600 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 32320 (128%)

Texel Rate

The Radeon HD 4730 is much (about 73%) faster with regards to AF than the GeForce GT 320. (explain)

Radeon HD 4730		22400 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 9440 (73%)

Pixel Rate

The Radeon HD 4730 should be much (approximately 30%) better at AA than the GeForce GT 320, and will be able to handle higher resolutions better. (explain)

Radeon HD 4730		5600 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 1280 (30%)

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 max amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes 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 - the lower the bandwidth is, the lower the potential to get to the max fill rate.