Radeon HD 4850 2GB vs Radeon R9 M370X

Intro

Compare all of that to the Radeon R9 M370X, which comes with a core clock speed of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M370X should theoretically perform a little bit faster than the Radeon HD 4850 2GB overall. (explain)

Radeon R9 M370X		72000 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 8448 (13%)

Texel Rate

The Radeon R9 M370X is a lot (about 28%) more effective at texture filtering than the Radeon HD 4850 2GB. (explain)

Radeon R9 M370X		32000 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 7000 (28%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M370X is superior to the Radeon HD 4850 2GB, and very much so. (explain)

Radeon R9 M370X		12800 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 2800 (28%)

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: Bandwidth is the max amount of information (measured in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.