GeForce 9800 GT 1GB vs GeForce GTX 285 1GB

Intro

Compare that to the GeForce GTX 285 1GB, which uses a 55 nm design. nVidia has clocked the core speed at 648 MHz. The GDDR3 memory is set to run at a frequency of 1242 MHz on this particular card. It features 240 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 1GB		105 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 99 Watts (94%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB should be 176% quicker than the GeForce 9800 GT 1GB in general, due to its higher bandwidth. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 101376 (176%)

Texel Rate

The GeForce GTX 285 1GB should be a lot (about 54%) more effective at texture filtering than the GeForce 9800 GT 1GB. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce 9800 GT 1GB		33600 Mtexels/sec
	Difference: 18240 (54%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 285 1GB is the winner, and very much so. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 11136 (116%)

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 over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.