GeForce 8500 GT vs Geforce GTX 780

Intro

Compare those specs to the Geforce GTX 780, which makes use of a 28 nm design. nVidia has set the core speed at 863 MHz. The GDDR5 memory is set to run at a speed of 1502 MHz on this particular card. 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 8500 GT		45 Watts
Geforce GTX 780		250 Watts
	Difference: 205 Watts (456%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 780 should in theory be much better than the GeForce 8500 GT overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 8500 GT		12800 MB/sec
	Difference: 275584 (2153%)

Texel Rate

The Geforce GTX 780 will be much (about 4503%) better at texture filtering than the GeForce 8500 GT. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 8500 GT		3600 Mtexels/sec
	Difference: 162096 (4503%)

Pixel Rate

The Geforce GTX 780 will be much (about 2201%) faster with regards to full screen anti-aliasing than the GeForce 8500 GT, and able to handle higher screen resolutions better. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 8500 GT		1800 Mpixels/sec
	Difference: 39624 (2201%)

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 (measured in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics 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 colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.