GeForce 9800 GTX vs GeForce GTX 980

Intro

Compare those specifications to the GeForce GTX 980, which has core clock speeds of 1126 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX		140 Watts
GeForce GTX 980		165 Watts
	Difference: 25 Watts (18%)

Memory Bandwidth

The GeForce GTX 980, in theory, should be quite a bit faster than the GeForce 9800 GTX in general. (explain)

GeForce GTX 980		224000 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 153600 (218%)

Texel Rate

The GeForce GTX 980 is much (more or less 234%) more effective at texture filtering than the GeForce 9800 GTX. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce 9800 GTX		43200 Mtexels/sec
	Difference: 100928 (234%)

Pixel Rate

The GeForce GTX 980 will be much (approximately 567%) faster with regards to FSAA than the GeForce 9800 GTX, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 61264 (567%)

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 max amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics 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 number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.