GeForce 830M vs Radeon HD 4670 512MB

Intro

Compare all of that to the Radeon HD 4670 512MB, which makes use of a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 memory is set to run at a frequency of 1000 MHz on this particular model. It features 320(64x5) SPUs along with 32 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

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

The Radeon HD 4670 512MB, in theory, should be quite a bit faster than the GeForce 830M in general. (explain)

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

Texel Rate

The Radeon HD 4670 512MB should be a lot (more or less 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 is a lot (about 37%) more effective at AA than the Radeon HD 4670 512MB, and should be capable of handling higher screen resolutions while still performing well. (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 MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units by the core clock 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount 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 outputting the pixels (image) to 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 max fill rate.