GeForce 830M vs Radeon HD 7970

Intro

Compare those specifications to the Radeon HD 7970, which features a core clock frequency of 925 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 384-bit memory bus, and uses a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 7970		250 Watts
	Difference: 225 Watts (900%)

Memory Bandwidth

The Radeon HD 7970 should in theory perform quite a bit faster than the GeForce 830M in general. (explain)

Radeon HD 7970		264000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 249600 (1733%)

Texel Rate

The Radeon HD 7970 will be much (more or less 619%) better at AF than the GeForce 830M. (explain)

Radeon HD 7970		118400 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 101936 (619%)

Pixel Rate

The Radeon HD 7970 will be a lot (approximately 260%) faster with regards to AA than the GeForce 830M, and should be capable of handling higher resolutions better. (explain)

Radeon HD 7970		29600 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 21368 (260%)

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 max amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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