GeForce 9800 GTX+ vs GeForce GTS 450

Intro

Compare all that to the GeForce GTS 450, which makes use of a 40 nm design. nVidia has set the core frequency at 783 MHz. The GDDR5 RAM works at a speed of 902 MHz on this model. It features 192 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

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

The GeForce 9800 GTX+, in theory, should be much faster than the GeForce GTS 450 overall. (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%) faster with regards to AF 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 little bit (more or less 6%) better at AA than the GeForce 9800 GTX+, and will be able to handle higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, 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 number of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.