GeForce 9800 GT 1GB vs GeForce 9800 GTX

Intro

Compare that to the GeForce 9800 GTX, which features clock speeds of 675 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 RAM. It features 128 SPUs as well as 64 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 1GB		105 Watts
GeForce 9800 GTX		140 Watts
	Difference: 35 Watts (33%)

Memory Bandwidth

In theory, the GeForce 9800 GTX should be 22% quicker than the GeForce 9800 GT 1GB in general, because of its higher bandwidth. (explain)

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

Texel Rate

The GeForce 9800 GTX will be quite a bit (about 29%) more effective at AF than the GeForce 9800 GT 1GB. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
GeForce 9800 GT 1GB		33600 Mtexels/sec
	Difference: 9600 (29%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 9800 GTX is a better choice, but it probably won't make a huge difference. (explain)

GeForce 9800 GTX		10800 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 1200 (13%)

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 (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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