GeForce GTX 650 vs GeForce GTX 780 Ti

Intro

Compare all of that to the GeForce GTX 780 Ti, which comes with a GPU core clock speed of 875 MHz, and 3072 MB of GDDR5 memory set to run at 1750 MHz through a 384-bit bus. It also features 2880 Stream Processors, 240 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 780 Ti		10900 points
GeForce GTX 650		2263 points
	Difference: 8637 (382%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 186 Watts (291%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 780 Ti is 320% quicker than the GeForce GTX 650 in general, because of its greater data rate. (explain)

GeForce GTX 780 Ti		336000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 256000 (320%)

Texel Rate

The GeForce GTX 780 Ti will be much (more or less 520%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 176144 (520%)

Pixel Rate

The GeForce GTX 780 Ti is quite a bit (more or less 148%) more effective at FSAA than the GeForce GTX 650, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 25072 (148%)

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 information (measured in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.