GeForce 9800 GTX+ vs GeForce GTS 450

Intro

Compare those specs to the GeForce GTS 450, which comes with clock speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 memory. It features 192 SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 39 Watts (37%)

Memory Bandwidth

In theory, the GeForce 9800 GTX+ should be 22% faster than the GeForce GTS 450 in general, due to its higher data rate. (explain)

GeForce 9800 GTX+		70400 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 12672 (22%)

Texel Rate

The GeForce 9800 GTX+ should be quite a bit (approximately 89%) more effective at texture filtering than the GeForce GTS 450. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 22176 (89%)

Pixel Rate

The GeForce GTS 450 is a small bit (about 6%) better at full screen anti-aliasing than the GeForce 9800 GTX+, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTS 450		12528 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 720 (6%)

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 maximum amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of 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 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 a second.

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