GeForce GTX 965M vs Radeon HD 3850 1GB

Intro

Compare all of that to the Radeon HD 3850 1GB, which has core clock speeds of 668 MHz on the GPU, and 828 MHz on the 1024 MB of GDDR3 RAM. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 3850 1GB		75 Watts
	Difference: 15 Watts (25%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 965M should be 21% faster than the Radeon HD 3850 1GB overall, because of its higher data rate. (explain)

GeForce GTX 965M		64000 MB/sec
Radeon HD 3850 1GB		52992 MB/sec
	Difference: 11008 (21%)

Texel Rate

The GeForce GTX 965M will be quite a bit (more or less 465%) more effective at AF than the Radeon HD 3850 1GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 3850 1GB		10688 Mtexels/sec
	Difference: 49728 (465%)

Pixel Rate

The GeForce GTX 965M is much (approximately 183%) more effective at AA than the Radeon HD 3850 1GB, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 3850 1GB		10688 Mpixels/sec
	Difference: 19520 (183%)

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 data (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.