GeForce GT 320 vs Radeon HD 4850 2GB

Intro

Compare all that to the Radeon HD 4850 2GB, which features GPU clock speed of 625 MHz, and 2048 MB of GDDR4 RAM running at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

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 speaking, the Radeon HD 4850 2GB is 151% faster 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 is much (approximately 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 will be quite a bit (more or less 131%) better at AA than the GeForce GT 320, and also should be capable of handling higher screen 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 max amount of data (in units of MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, it should 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.