Radeon HD 4550 512MB vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which features GPU core speed of 1100 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 M385X should in theory be quite a bit superior to the Radeon HD 4550 512MB in general. (explain)

Radeon R9 M385X		96000 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 83200 (650%)

Texel Rate

The Radeon R9 M385X will be a lot (more or less 1183%) more effective at texture filtering than the Radeon HD 4550 512MB. (explain)

Radeon R9 M385X		61600 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 56800 (1183%)

Pixel Rate

The Radeon R9 M385X should be a lot (more or less 633%) faster with regards to AA than the Radeon HD 4550 512MB, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 M385X		17600 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 15200 (633%)

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 maximum amount of information (counted in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one 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 better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.