GeForce GT 320 vs Radeon R9 295X2

Intro

Compare those specs to the Radeon R9 295X2, which comes with a clock frequency of 1018 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 512-bit memory bus, and uses a 28 nm design. It features 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon R9 295X2		500 Watts
	Difference: 457 Watts (1063%)

Memory Bandwidth

Performance-wise, the Radeon R9 295X2 should theoretically be much superior to the GeForce GT 320 overall. (explain)

Radeon R9 295X2		640000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 614720 (2432%)

Texel Rate

The Radeon R9 295X2 is quite a bit (approximately 2665%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

Radeon R9 295X2		358336 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 345376 (2665%)

Pixel Rate

The Radeon R9 295X2 is a lot (approximately 2916%) better at FSAA than the GeForce GT 320, and also should be able to handle higher resolutions more effectively. (explain)

Radeon R9 295X2		130304 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 125984 (2916%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.