Radeon HD 4850 2GB vs Radeon R9 M380

Intro

Compare all that to the Radeon R9 M380, which has GPU core speed of 1000 MHz, and 4096 MB of GDDR5 RAM set to run at 1500 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M380 should in theory be quite a bit better than the Radeon HD 4850 2GB in general. (explain)

Radeon R9 M380		96000 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 32448 (51%)

Texel Rate

The Radeon R9 M380 is quite a bit (about 60%) better at anisotropic filtering than the Radeon HD 4850 2GB. (explain)

Radeon R9 M380		40000 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 15000 (60%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 M380 is the winner, and very much so. (explain)

Radeon R9 M380		16000 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 6000 (60%)

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 data (in units of MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.