GeForce GTX 650 vs Geforce GTX 680

Intro

Compare those specs to the Geforce GTX 680, which comes with GPU clock speed of 1006 MHz, and 2048 MB of GDDR5 memory running at 1502 MHz through a 256-bit bus. It also features 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

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 680		7650 points
GeForce GTX 650		2263 points
	Difference: 5387 (238%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Geforce GTX 680		195 Watts
	Difference: 131 Watts (205%)

Memory Bandwidth

Theoretically, the Geforce GTX 680 should perform much faster than the GeForce GTX 650 overall. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 112256 (140%)

Texel Rate

The Geforce GTX 680 is a lot (approximately 280%) more effective at texture filtering than the GeForce GTX 650. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 94912 (280%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 680 is superior to the GeForce GTX 650, and very much so. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 15264 (90%)

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 maximum amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 processed per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better this number, 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 that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 bandwidth is, the lower the potential to reach the maximum fill rate.