GeForce GTX 965M vs Radeon HD 3650

Intro

Compare those specifications to the Radeon HD 3650, which comes with GPU core speed of 725 MHz, and 1024 MB of GDDR4 memory running at 800 MHz through a 128-bit bus. It also features 120(24x5) SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 3650		78 Watts
	Difference: 18 Watts (30%)

Memory Bandwidth

Theoretically, the GeForce GTX 965M should be a lot faster than the Radeon HD 3650 in general. (explain)

GeForce GTX 965M		64000 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 38400 (150%)

Texel Rate

The GeForce GTX 965M is much (about 942%) more effective at AF than the Radeon HD 3650. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 54616 (942%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 965M is a better choice, and very much so. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 27308 (942%)

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 largest amount of information (counted in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that can be applied in one second. This is calculated 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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