GeForce GT 220 GDDR3 vs GeForce GTX 850M

Intro

Compare those specs to the GeForce GTX 850M, which features core speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GT 220 GDDR3		58 Watts
	Difference: 18 Watts (45%)

Memory Bandwidth

Performance-wise, the GeForce GT 220 GDDR3 should theoretically be a little bit superior to the GeForce GTX 850M in general. (explain)

GeForce GT 220 GDDR3		32384 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 384 (1%)

Texel Rate

The GeForce GTX 850M is a lot (more or less 250%) better at AF than the GeForce GT 220 GDDR3. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GT 220 GDDR3		10000 Mtexels/sec
	Difference: 25040 (250%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 850M is superior to the GeForce GT 220 GDDR3, and very much so. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce GT 220 GDDR3		5000 Mpixels/sec
	Difference: 9016 (180%)

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 information (in units of MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the 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 maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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 get to the max fill rate.