GeForce GT 320 vs GeForce GTX 260 216SP 55 nm

Intro

Compare those specifications to the GeForce GTX 260 216SP 55 nm, which has core speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 memory. It features 216 SPUs as well as 72 Texture Address Units and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 128 Watts (298%)

Memory Bandwidth

Theoretically, the GeForce GTX 260 216SP 55 nm should be much faster than the GeForce GT 320 overall. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 86608 (343%)

Texel Rate

The GeForce GTX 260 216SP 55 nm is much (about 220%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 28512 (220%)

Pixel Rate

The GeForce GTX 260 216SP 55 nm will be quite a bit (about 273%) faster with regards to anti-aliasing than the GeForce GT 320, and capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 11808 (273%)

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 data (measured in megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also 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 of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.