GeForce 9800 GT 512MB vs Geforce GTX 780

Intro

Compare all that to the Geforce GTX 780, which makes use of a 28 nm design. nVidia has clocked the core speed at 863 MHz. The GDDR5 RAM is set to run at a speed of 1502 MHz on this particular model. It features 2304 SPUs along with 192 TAUs and 48 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
Geforce GTX 780		250 Watts
	Difference: 145 Watts (138%)

Memory Bandwidth

Performance-wise, the Geforce GTX 780 should theoretically be much better than the GeForce 9800 GT 512MB in general. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 230784 (401%)

Texel Rate

The Geforce GTX 780 will be much (more or less 393%) better at texture filtering than the GeForce 9800 GT 512MB. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 132096 (393%)

Pixel Rate

The Geforce GTX 780 is much (about 332%) better at FSAA than the GeForce 9800 GT 512MB, and should be able to handle higher resolutions more effectively. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 31824 (332%)

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 largest amount of data (measured in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 are applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.