GeForce 830M vs Radeon HD 4670 512MB

Intro

Compare those specs to the Radeon HD 4670 512MB, which has a clock frequency of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory frequency of 1000 MHz. It also makes use of a 128-bit memory bus, and makes use of a 55 nm design. It is comprised of 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 4670 512MB		70 Watts
	Difference: 45 Watts (180%)

Memory Bandwidth

In theory, the Radeon HD 4670 512MB should be 122% faster than the GeForce 830M overall, due to its higher data rate. (explain)

Radeon HD 4670 512MB		32000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 17600 (122%)

Texel Rate

The Radeon HD 4670 512MB is much (approximately 46%) faster with regards to anisotropic filtering than the GeForce 830M. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 7536 (46%)

Pixel Rate

The GeForce 830M should be much (more or less 37%) better at AA than the Radeon HD 4670 512MB, and also will be able to handle higher screen resolutions better. (explain)

GeForce 830M		8232 Mpixels/sec
Radeon HD 4670 512MB		6000 Mpixels/sec
	Difference: 2232 (37%)

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 max amount of data (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core 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 maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.