GeForce 820M vs GeForce 9500 GT 1GB GDDR3

Intro

Compare that to the GeForce 9500 GT 1GB GDDR3, which has core speeds of 550 MHz on the GPU, and 800 MHz on the 1024 MB of GDDR3 RAM. It features 32 SPUs along with 16 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce 9500 GT 1GB GDDR3		50 Watts
	Difference: 35 Watts (233%)

Memory Bandwidth

The GeForce 9500 GT 1GB GDDR3, in theory, should be much faster than the GeForce 820M in general. (explain)

GeForce 9500 GT 1GB GDDR3		25600 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 9600 (60%)

Texel Rate

The GeForce 820M should be much (about 31%) more effective at AF than the GeForce 9500 GT 1GB GDDR3. (explain)

GeForce 820M		11504 Mtexels/sec
GeForce 9500 GT 1GB GDDR3		8800 Mtexels/sec
	Difference: 2704 (31%)

Pixel Rate

The GeForce 9500 GT 1GB GDDR3 will be much (about 53%) more effective at FSAA than the GeForce 820M, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce 9500 GT 1GB GDDR3		4400 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 1524 (53%)

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 data (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 in one second. This is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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