Radeon HD 4850 X2 1GB vs Radeon R9 M375

Intro

Compare that to the Radeon R9 M375, which uses a 28 nm design. AMD has set the core frequency at 1015 MHz. The DDR3 memory is set to run at a frequency of 1100 MHz on this particular model. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 4850 X2 1GB should perform a lot faster than the Radeon R9 M375 in general. (explain)

Radeon HD 4850 X2 1GB		127104 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 91904 (261%)

Texel Rate

The Radeon HD 4850 X2 1GB should be quite a bit (about 23%) better at anisotropic filtering than the Radeon R9 M375. (explain)

Radeon HD 4850 X2 1GB		50000 Mtexels/sec
Radeon R9 M375		40600 Mtexels/sec
	Difference: 9400 (23%)

Pixel Rate

The Radeon HD 4850 X2 1GB will be much (more or less 23%) faster with regards to AA than the Radeon R9 M375, and should be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 4850 X2 1GB		20000 Mpixels/sec
Radeon R9 M375		16240 Mpixels/sec
	Difference: 3760 (23%)

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 maximum amount of information (counted in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.