GeForce 930M vs Radeon HD 4770

Intro

Compare those specs to the Radeon HD 4770, which uses a 40 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 RAM runs at a speed of 800 MHz on this specific card. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4770 should theoretically be 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 a little bit (approximately 8%) more effective at AF than the GeForce 930M. (explain)

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

Pixel Rate

The Radeon HD 4770 should be a lot (more or less 62%) better at full screen anti-aliasing than the GeForce 930M, and should be able to handle higher resolutions better. (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 (measured in MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.