GeForce 820M vs GeForce GTS 450

Intro

Compare all that to the GeForce GTS 450, which features core speeds of 783 MHz on the GPU, and 902 MHz on the 512 MB of GDDR5 memory. It features 192 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

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

The GeForce GTS 450 should theoretically be quite a bit faster than the GeForce 820M overall. (explain)

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

Texel Rate

The GeForce GTS 450 will be quite a bit (about 118%) faster with regards to AF than the GeForce 820M. (explain)

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

Pixel Rate

The GeForce GTS 450 is quite a bit (approximately 336%) faster with regards to FSAA than the GeForce 820M, and will be able to handle higher screen resolutions without slowing down too much. (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 largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.