Radeon HD 4850 2GB vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which has GPU core speed of 1015 MHz, and 4096 MB of DDR3 RAM set to run at 1100 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 4850 2GB should be a lot faster than the Radeon R9 M375 overall. (explain)

Radeon HD 4850 2GB		63552 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 28352 (81%)

Texel Rate

The Radeon R9 M375 is much (about 62%) better at anisotropic filtering than the Radeon HD 4850 2GB. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 15600 (62%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 M375 is superior to the Radeon HD 4850 2GB, by far. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 6240 (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 data (measured in megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.