GeForce 830M vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which has GPU core speed of 730 MHz, and 512 MB of GDDR5 memory set to run at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 4750		75 Watts
	Difference: 50 Watts (200%)

Memory Bandwidth

The Radeon HD 4750 should theoretically perform quite a bit faster than the GeForce 830M overall. (explain)

Radeon HD 4750		51200 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 36800 (256%)

Texel Rate

The Radeon HD 4750 will be a lot (about 42%) better at texture filtering than the GeForce 830M. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 6896 (42%)

Pixel Rate

The Radeon HD 4750 will be much (approximately 42%) better at anti-aliasing than the GeForce 830M, and should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4750		11680 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 3448 (42%)

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 largest amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.