GeForce GT 320 vs Radeon HD 6790

Intro

Compare those specs to the Radeon HD 6790, which features a core clock frequency of 840 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is made up of 800 SPUs, 40 Texture Address Units, 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 6790		150 Watts
	Difference: 107 Watts (249%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6790 should perform a lot faster than 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 will be quite a bit (approximately 159%) more effective at AF than the GeForce GT 320. (explain)

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

Pixel Rate

The Radeon HD 6790 is a lot (approximately 211%) faster with regards to anti-aliasing than the GeForce GT 320, and will be capable of handling higher screen resolutions without losing too much performance. (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: Memory bandwidth is the largest amount of information (counted in MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 chip could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.