GeForce GTX 650 vs Geforce GTX 680

Intro

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

Display Graphs

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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 speaking, the Geforce GTX 680 should perform quite a bit faster than the GeForce GTX 650 in general. (explain)

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

Texel Rate

The Geforce GTX 680 will be much (approximately 280%) faster with regards to 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

The Geforce GTX 680 is quite a bit (approximately 90%) better at anti-aliasing than the GeForce GTX 650, and also should be capable of handling higher screen resolutions better. (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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.