GeForce 930M vs Radeon HD 4770

Intro

Compare that to the Radeon HD 4770, which features core speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4770 should perform quite a bit faster than the GeForce 930M in general. (explain)

Radeon HD 4770		51200 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 36800 (256%)

Texel Rate

The Radeon HD 4770 should be just a bit (approximately 8%) more effective at anisotropic filtering than the GeForce 930M. (explain)

Radeon HD 4770		24000 Mtexels/sec
GeForce 930M		22272 Mtexels/sec
	Difference: 1728 (8%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4770 is superior to the GeForce 930M, by far. (explain)

Radeon HD 4770		12000 Mpixels/sec
GeForce 930M		7424 Mpixels/sec
	Difference: 4576 (62%)

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 (in units of megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling 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 video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 ability to reach the maximum fill rate.