GeForce GTS 450 vs GeForce GTX 465

Intro

Compare all of that to the GeForce GTX 465, which has a core clock speed of 607 MHz and a GDDR5 memory frequency of 802 MHz. It also features a 256-bit bus, and makes use of a 40 nm design. It is made up of 352 SPUs, 44 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce GTX 465		200 Watts
	Difference: 94 Watts (89%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 465 should in theory be much better than the GeForce GTS 450 overall. (explain)

GeForce GTX 465		102592 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 44864 (78%)

Texel Rate

The GeForce GTX 465 should be just a bit (about 7%) better at texture filtering than the GeForce GTS 450. (explain)

GeForce GTX 465		26708 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 1652 (7%)

Pixel Rate

The GeForce GTX 465 will be quite a bit (approximately 55%) more effective at full screen anti-aliasing than the GeForce GTS 450, and will be capable of handling higher resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce GTS 450		12528 Mpixels/sec
	Difference: 6896 (55%)

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 largest amount of information (in units of MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock 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 faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.