GeForce GT 320 vs GeForce GTS 450 1GB

Intro

Compare those specifications to the GeForce GTS 450 1GB, which features a core clock speed of 783 MHz and a GDDR5 memory speed of 902 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is comprised of 192 SPUs, 32 Texture Address Units, and 16 ROPs.

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

In theory, the GeForce GTS 450 1GB should perform much faster than the GeForce GT 320 overall. (explain)

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

Texel Rate

The GeForce GTS 450 1GB will be quite a bit (more or less 93%) faster with regards to texture filtering 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 will be much (more or less 190%) faster with regards to full screen anti-aliasing than the GeForce GT 320, and will be capable of handling higher screen resolutions better. (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: Bandwidth is the max amount of data (in units of megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is calculated 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.