GeForce 830M vs Radeon HD 4850 512MB

Intro

Compare that to the Radeon HD 4850 512MB, which uses a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 RAM runs at a frequency of 993 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 85 Watts (340%)

Memory Bandwidth

Theoretically, the Radeon HD 4850 512MB should be much faster than the GeForce 830M overall. (explain)

Radeon HD 4850 512MB		63552 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 49152 (341%)

Texel Rate

The Radeon HD 4850 512MB is quite a bit (more or less 52%) better at AF than the GeForce 830M. (explain)

Radeon HD 4850 512MB		25000 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 8536 (52%)

Pixel Rate

The Radeon HD 4850 512MB will be a lot (about 21%) faster with regards to anti-aliasing than the GeForce 830M, and will be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 4850 512MB		10000 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 1768 (21%)

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: Bandwidth is the maximum amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.