GeForce 9800 GTX vs GeForce 9800 GTX+

Intro

Compare that to the GeForce 9800 GTX+, which features GPU core speed of 738 MHz, and 512 MB of GDDR3 memory running at 1100 MHz through a 256-bit bus. It also features 128 Stream Processors, 64 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX		140 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 5 Watts (4%)

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so in theory they should perform the same. (explain)

Texel Rate

The GeForce 9800 GTX+ should be a little bit (approximately 9%) more effective at texture filtering than the GeForce 9800 GTX. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
GeForce 9800 GTX		43200 Mtexels/sec
	Difference: 4032 (9%)

Pixel Rate

The GeForce 9800 GTX+ will be a small bit (more or less 9%) better at full screen anti-aliasing than the GeForce 9800 GTX, and capable of handling higher resolutions more effectively. (explain)

GeForce 9800 GTX+		11808 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 1008 (9%)

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 max amount of data (counted in MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses 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 high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.