GeForce GT 320 vs Radeon HD 4850 1GB

Intro

Compare all that to the Radeon HD 4850 1GB, which has core clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR4 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 67 Watts (156%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 1GB should perform quite a bit faster than the GeForce GT 320 in general. (explain)

Radeon HD 4850 1GB		63552 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 38272 (151%)

Texel Rate

The Radeon HD 4850 1GB is quite a bit (approximately 93%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 12040 (93%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4850 1GB is superior to the GeForce GT 320, and very much so. (explain)

Radeon HD 4850 1GB		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 (measured in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, 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 video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.