GeForce GT 320 vs GeForce GTS 150

Intro

Compare those specs to the GeForce GTS 150, which has core clock speeds of 740 MHz on the GPU, and 500 MHz on the 1024 MB of GDDR3 memory. It features 128 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTS 150		141 Watts
	Difference: 98 Watts (228%)

Memory Bandwidth

Performance-wise, the GeForce GTS 150 should in theory be much better than the GeForce GT 320 overall. (explain)

GeForce GTS 150		32000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 6720 (27%)

Texel Rate

The GeForce GTS 150 should be a lot (approximately 265%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

GeForce GTS 150		47360 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 34400 (265%)

Pixel Rate

The GeForce GTS 150 should be much (more or less 174%) faster with regards to full screen anti-aliasing than the GeForce GT 320, and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTS 150		11840 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 7520 (174%)

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 megabytes per second) that can be moved across 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 RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are processed per second. This is calculated by multiplying the total texture units 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.