GeForce 930M vs Radeon HD 3870 X2 1GB

Intro

Compare all of that to the Radeon HD 3870 X2 1GB, which features a clock frequency of 825 MHz and a GDDR4 memory frequency of 1126 MHz. It also uses a 256-bit memory bus, and uses a 55 nm design. It is comprised of 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3870 X2 1GB should perform much faster than the GeForce 930M overall. (explain)

Radeon HD 3870 X2 1GB		144128 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 129728 (901%)

Texel Rate

The Radeon HD 3870 X2 1GB is a small bit (more or less 19%) faster with regards to anisotropic filtering than the GeForce 930M. (explain)

Radeon HD 3870 X2 1GB		26400 Mtexels/sec
GeForce 930M		22272 Mtexels/sec
	Difference: 4128 (19%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 3870 X2 1GB is superior to the GeForce 930M, and very much so. (explain)

Radeon HD 3870 X2 1GB		26400 Mpixels/sec
GeForce 930M		7424 Mpixels/sec
	Difference: 18976 (256%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 are applied in one second. This is calculated by multiplying the total 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.