GeForce GTX 465 vs Geforce GTX 780

Intro

Compare all that to the Geforce GTX 780, which comes with a GPU core clock speed of 863 MHz, and 3072 MB of GDDR5 RAM set to run at 1502 MHz through a 384-bit bus. It also is comprised of 2304 Stream Processors, 192 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465		200 Watts
Geforce GTX 780		250 Watts
	Difference: 50 Watts (25%)

Memory Bandwidth

Performance-wise, the Geforce GTX 780 should theoretically be quite a bit better than the GeForce GTX 465 overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 185792 (181%)

Texel Rate

The Geforce GTX 780 is a lot (about 520%) more effective at anisotropic filtering than the GeForce GTX 465. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 138988 (520%)

Pixel Rate

The Geforce GTX 780 will be a lot (approximately 113%) faster with regards to AA than the GeForce GTX 465, and should be able to handle higher resolutions while still performing well. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 22000 (113%)

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 maximum amount of information (measured in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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.