GeForce 820M vs GeForce GTS 450

Intro

Compare that to the GeForce GTS 450, which comes with core speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 RAM. It features 192 SPUs along with 32 Texture Address Units and 16 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 GTS 450		1453 points
GeForce 820M		850 points
	Difference: 603 (71%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTS 450		106 Watts
	Difference: 91 Watts (607%)

Memory Bandwidth

Performance-wise, the GeForce GTS 450 should in theory be quite a bit superior to the GeForce 820M in general. (explain)

GeForce GTS 450		57728 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 41728 (261%)

Texel Rate

The GeForce GTS 450 is much (more or less 118%) faster with regards to anisotropic filtering than the GeForce 820M. (explain)

GeForce GTS 450		25056 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 13552 (118%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTS 450 is superior to the GeForce 820M, by far. (explain)

GeForce GTS 450		12528 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 9652 (336%)

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 data (measured in 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. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of 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.