Radeon HD 4850 2GB vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which has core clock speeds of 1015 MHz on the GPU, and 1100 MHz on the 4096 MB of DDR3 memory. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 4850 2GB should in theory be much superior to the Radeon R9 M375 in general. (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 (more or less 62%) more effective at texture 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

The Radeon R9 M375 will be much (more or less 62%) faster with regards to AA than the Radeon HD 4850 2GB, and will be able to handle higher screen resolutions better. (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 largest amount of information (in units of megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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 fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.