GeForce 830M vs Radeon HD 7770

Intro

Compare those specs to the Radeon HD 7770, which makes use of a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory works at a speed of 1125 MHz on this specific model. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 7770		80 Watts
	Difference: 55 Watts (220%)

Memory Bandwidth

In theory, the Radeon HD 7770 will be 400% faster than the GeForce 830M in general, due to its higher data rate. (explain)

Radeon HD 7770		72000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 57600 (400%)

Texel Rate

The Radeon HD 7770 is quite a bit (about 143%) faster with regards to texture filtering than the GeForce 830M. (explain)

Radeon HD 7770		40000 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 23536 (143%)

Pixel Rate

The Radeon HD 7770 is quite a bit (about 94%) faster with regards to FSAA than the GeForce 830M, and also capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 7770		16000 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 7768 (94%)

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 past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, 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 maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.