GeForce GTX 965M vs Radeon HD 4830 1GB

Intro

Compare all that to the Radeon HD 4830 1GB, which has core clock speeds of 575 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR4 RAM. It features 640(128x5) SPUs along with 32 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 4830 1GB		95 Watts
	Difference: 35 Watts (58%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 965M will be 11% quicker than the Radeon HD 4830 1GB in general, due to its higher data rate. (explain)

GeForce GTX 965M		64000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The GeForce GTX 965M is much (more or less 228%) more effective at anisotropic filtering than the Radeon HD 4830 1GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 42016 (228%)

Pixel Rate

If using 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 4830 1GB		9200 Mpixels/sec
	Difference: 21008 (228%)

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 megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video 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 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 worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.