GeForce 9800 GT 1GB vs GeForce 9800 GTX

Intro

Compare all of that to the GeForce 9800 GTX, which features core 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 ROPs.

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

Theoretically speaking, the GeForce 9800 GTX should be 22% quicker than the GeForce 9800 GT 1GB overall, 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 much (approximately 29%) more effective at texture filtering 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

The GeForce 9800 GTX will be a small bit (approximately 13%) better at full screen anti-aliasing than the GeForce 9800 GT 1GB, and also should be capable of handling higher screen resolutions while still performing well. (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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.