GeForce GT 320 vs Radeon HD 4850 2GB

Intro

Compare those specs to the Radeon HD 4850 2GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR4 RAM runs at a frequency of 993 MHz on this specific card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 67 Watts (156%)

Memory Bandwidth

In theory, the Radeon HD 4850 2GB should be 151% quicker than the GeForce GT 320 in general, due to its higher bandwidth. (explain)

Radeon HD 4850 2GB		63552 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 38272 (151%)

Texel Rate

The Radeon HD 4850 2GB should be quite a bit (approximately 93%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

Radeon HD 4850 2GB		25000 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 12040 (93%)

Pixel Rate

The Radeon HD 4850 2GB is much (approximately 131%) more effective at full screen anti-aliasing than the GeForce GT 320, and will be capable of handling higher screen resolutions better. (explain)

Radeon HD 4850 2GB		10000 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 5680 (131%)

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 data (counted in megabytes 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. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of 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.