Radeon HD 3850 512MB vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which features a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3850 512MB		75 Watts
Radeon R9 M395X		125 Watts
	Difference: 50 Watts (67%)

Memory Bandwidth

The Radeon R9 M395X, in theory, should perform quite a bit faster than the Radeon HD 3850 512MB in general. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 3850 512MB		52992 MB/sec
	Difference: 107008 (202%)

Texel Rate

The Radeon R9 M395X will be quite a bit (about 766%) faster with regards to texture filtering than the Radeon HD 3850 512MB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 3850 512MB		10688 Mtexels/sec
	Difference: 81856 (766%)

Pixel Rate

The Radeon R9 M395X should be a lot (approximately 116%) better at full screen anti-aliasing than the Radeon HD 3850 512MB, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 3850 512MB		10688 Mpixels/sec
	Difference: 12448 (116%)

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 maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core clock 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 in one second.

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