GeForce GTX 650 vs GeForce GTX 980M

Intro

Compare those specifications to the GeForce GTX 980M, which features GPU clock speed of 1038 MHz, and 4096 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 Texture Address Units, and 64 Raster Operation Units.

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 980M		9476 points
GeForce GTX 650		2263 points
	Difference: 7213 (319%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 980M		100 Watts
	Difference: 36 Watts (56%)

Memory Bandwidth

Theoretically, the GeForce GTX 980M should be a lot faster than the GeForce GTX 650 overall. (explain)

GeForce GTX 980M		128000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 48000 (60%)

Texel Rate

The GeForce GTX 980M is quite a bit (approximately 194%) faster with regards to AF than the GeForce GTX 650. (explain)

GeForce GTX 980M		99648 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 65792 (194%)

Pixel Rate

The GeForce GTX 980M should be quite a bit (approximately 292%) faster with regards to anti-aliasing than the GeForce GTX 650, and capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 980M		66432 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 49504 (292%)

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 (counted in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 once 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, 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 could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.