GeForce GT 320 vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which has a clock speed of 1058 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is comprised of 384 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 650		64 Watts
	Difference: 21 Watts (49%)

Memory Bandwidth

The GeForce GTX 650 should theoretically be much faster than the GeForce GT 320 in general. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 54720 (216%)

Texel Rate

The GeForce GTX 650 will be a lot (approximately 161%) more effective at AF than the GeForce GT 320. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 20896 (161%)

Pixel Rate

The GeForce GTX 650 should be a lot (approximately 292%) faster with regards to anti-aliasing than the GeForce GT 320, and should be able to handle higher resolutions more effectively. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 12608 (292%)

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 maximum amount of information (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.