GeForce 830M vs Radeon HD 4850 512MB

Intro

Compare those specifications to the Radeon HD 4850 512MB, which features a core clock frequency of 625 MHz and a GDDR3 memory frequency of 993 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It features 800(160x5) SPUs, 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

As far as performance goes, the Radeon HD 4850 512MB should in theory be much superior to 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 a lot (about 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

If using a high resolution is important to you, then the Radeon HD 4850 512MB is superior to the GeForce 830M, and very much so. (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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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