GeForce GT 320 vs GeForce GTS 450 1GB

Intro

Compare all of that to the GeForce GTS 450 1GB, which features core clock speeds of 783 MHz on the GPU, and 902 MHz on the 1024 MB of GDDR5 memory. It features 192 SPUs along with 32 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 450 1GB		106 Watts
	Difference: 63 Watts (147%)

Memory Bandwidth

The GeForce GTS 450 1GB, in theory, should perform much faster than the GeForce GT 320 in general. (explain)

GeForce GTS 450 1GB		57728 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 32448 (128%)

Texel Rate

The GeForce GTS 450 1GB should be much (approximately 93%) better at AF than the GeForce GT 320. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 12096 (93%)

Pixel Rate

The GeForce GTS 450 1GB is quite a bit (about 190%) more effective at AA than the GeForce GT 320, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 8208 (190%)

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 (measured in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.