GeForce GTX 650 vs GeForce GTX 980

Intro

Compare those specs to the GeForce GTX 980, which features GPU core speed of 1126 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 64 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 980		13552 points
GeForce GTX 650		2263 points
	Difference: 11289 (499%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 980		165 Watts
	Difference: 101 Watts (158%)

Memory Bandwidth

In theory, the GeForce GTX 980 should perform quite a bit faster than the GeForce GTX 650 overall. (explain)

GeForce GTX 980		224000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 144000 (180%)

Texel Rate

The GeForce GTX 980 will be a lot (approximately 326%) faster with regards to AF than the GeForce GTX 650. (explain)

GeForce GTX 980		144128 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 110272 (326%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 980 is superior to the GeForce GTX 650, and very much so. (explain)

GeForce GTX 980		72064 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 55136 (326%)

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 max amount of information (measured in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core 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 per second.

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