GeForce 820M vs GeForce GTX 965M

Intro

Compare all that to the GeForce GTX 965M, which comes with GPU clock speed of 944 MHz, and 2048 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also features 1024 Stream Processors, 64 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 965M		5650 points
GeForce 820M		850 points
	Difference: 4800 (565%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 965M		60 Watts
	Difference: 45 Watts (300%)

Memory Bandwidth

The GeForce GTX 965M, in theory, should be a lot faster than the GeForce 820M overall. (explain)

GeForce GTX 965M		64000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 48000 (300%)

Texel Rate

The GeForce GTX 965M is a lot (about 425%) better at AF than the GeForce 820M. (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 48912 (425%)

Pixel Rate

The GeForce GTX 965M will be a lot (approximately 950%) more effective at full screen anti-aliasing than the GeForce 820M, and also able to handle higher resolutions more effectively. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 27332 (950%)

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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.