GeForce GTX 850M vs Radeon HD 3650 256MB

Intro

Compare those specs to the Radeon HD 3650 256MB, which features core clock speeds of 725 MHz on the GPU, and 800 MHz on the 256 MB of DDR2 memory. It features 120(24x5) SPUs along with 8 TAUs and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon HD 3650 256MB		78 Watts
	Difference: 38 Watts (95%)

Memory Bandwidth

The GeForce GTX 850M, in theory, should be much faster than the Radeon HD 3650 256MB overall. (explain)

GeForce GTX 850M		32000 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 6400 (25%)

Texel Rate

The GeForce GTX 850M is much (approximately 504%) better at anisotropic filtering than the Radeon HD 3650 256MB. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 29240 (504%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 850M is a better choice, and very much so. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 11116 (383%)

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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling 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 record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.