GeForce GTX 965M vs Radeon HD 4650 1GB

Intro

Compare that to the Radeon HD 4650 1GB, which comes with GPU core speed of 600 MHz, and 1024 MB of GDDR3 RAM set to run at 700 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GTX 965M		60 Watts
	Difference: 5 Watts (9%)

Memory Bandwidth

The GeForce GTX 965M should theoretically be quite a bit faster than the Radeon HD 4650 1GB in general. (explain)

GeForce GTX 965M		64000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 41600 (186%)

Texel Rate

The GeForce GTX 965M should be much (more or less 215%) more effective at texture filtering than the Radeon HD 4650 1GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 41216 (215%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 965M is the winner, by far. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 25408 (529%)

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 (counted in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one 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 drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.