GeForce 8800 GT 1GB vs GeForce 9800 GTX+

Intro

Compare those specs to the GeForce 9800 GTX+, which uses a 55 nm design. nVidia has set the core speed at 738 MHz. The GDDR3 memory runs at a speed of 1100 MHz on this card. It features 128 SPUs along with 64 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 1GB		105 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 40 Watts (38%)

Memory Bandwidth

As far as performance goes, the GeForce 9800 GTX+ should in theory be a lot better than the GeForce 8800 GT 1GB overall. (explain)

GeForce 9800 GTX+		70400 MB/sec
GeForce 8800 GT 1GB		57600 MB/sec
	Difference: 12800 (22%)

Texel Rate

The GeForce 9800 GTX+ should be a lot (about 41%) better at texture filtering than the GeForce 8800 GT 1GB. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
GeForce 8800 GT 1GB		33600 Mtexels/sec
	Difference: 13632 (41%)

Pixel Rate

The GeForce 9800 GTX+ is quite a bit (about 23%) more effective at full screen anti-aliasing than the GeForce 8800 GT 1GB, and capable of handling higher resolutions while still performing well. (explain)

GeForce 9800 GTX+		11808 Mpixels/sec
GeForce 8800 GT 1GB		9600 Mpixels/sec
	Difference: 2208 (23%)

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 data (in units of MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core 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 per second.

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