GeForce GTX 965M vs Radeon HD 4830 512MB

Intro

Compare all that to the Radeon HD 4830 512MB, which features core clock speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 4830 512MB		95 Watts
	Difference: 35 Watts (58%)

Memory Bandwidth

Performance-wise, the GeForce GTX 965M should theoretically be a little bit better than the Radeon HD 4830 512MB overall. (explain)

GeForce GTX 965M		64000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 6400 (11%)

Texel Rate

The GeForce GTX 965M should be much (more or less 228%) faster with regards to texture filtering than the Radeon HD 4830 512MB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 42016 (228%)

Pixel Rate

The GeForce GTX 965M is quite a bit (more or less 228%) more effective at AA than the Radeon HD 4830 512MB, and should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 4830 512MB		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 information (in units of MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.