GeForce GT 320 vs Radeon HD 6790

Intro

Compare all that to the Radeon HD 6790, which has GPU clock speed of 840 MHz, and 1024 MB of GDDR5 RAM running at 1050 MHz through a 256-bit bus. It also is comprised of 800 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 6790		150 Watts
	Difference: 107 Watts (249%)

Memory Bandwidth

Performance-wise, the Radeon HD 6790 should in theory be quite a bit superior to the GeForce GT 320 overall. (explain)

Radeon HD 6790		134400 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 109120 (432%)

Texel Rate

The Radeon HD 6790 should be a lot (about 159%) more effective at texture filtering than the GeForce GT 320. (explain)

Radeon HD 6790		33600 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 20640 (159%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6790 is superior to the GeForce GT 320, by a large margin. (explain)

Radeon HD 6790		13440 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 9120 (211%)

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 (measured in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's 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 amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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