Radeon HD 4850 2GB vs Radeon R9 M375X

Intro

Compare that to the Radeon R9 M375X, which comes with a clock frequency of 1015 MHz and a GDDR5 memory frequency of 1125 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M375X will be 13% quicker than the Radeon HD 4850 2GB in general, due to its greater data rate. (explain)

Radeon R9 M375X		72000 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 8448 (13%)

Texel Rate

The Radeon R9 M375X will be much (approximately 62%) better at anisotropic filtering than the Radeon HD 4850 2GB. (explain)

Radeon R9 M375X		40600 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 15600 (62%)

Pixel Rate

The Radeon R9 M375X is quite a bit (approximately 62%) more effective at FSAA than the Radeon HD 4850 2GB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 M375X		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 max amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.