GeForce GT 320 vs Radeon HD 4850 2GB

Intro

Compare that to the Radeon HD 4850 2GB, which comes with GPU clock speed of 625 MHz, and 2048 MB of GDDR4 memory set to run at 993 MHz through a 256-bit bus. It also features 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation 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

Theoretically, the Radeon HD 4850 2GB should be a lot faster than the GeForce GT 320 in general. (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 (more or less 93%) better at texture 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 should be much (approximately 131%) faster with regards to FSAA than the GeForce GT 320, and capable of handling higher resolutions while still performing well. (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 information (measured in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.