Radeon HD 4550 256MB vs Radeon R9 M385X

Intro

Compare that to the Radeon R9 M385X, which comes with GPU clock speed of 1100 MHz, and 4096 MB of GDDR5 RAM set to run at 1500 MHz through a 128-bit bus. It also is comprised of 896 Stream Processors, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M385X should in theory perform much faster than the Radeon HD 4550 256MB overall. (explain)

Radeon R9 M385X		96000 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 83200 (650%)

Texel Rate

The Radeon R9 M385X will be quite a bit (approximately 1183%) better at texture filtering than the Radeon HD 4550 256MB. (explain)

Radeon R9 M385X		61600 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 56800 (1183%)

Pixel Rate

The Radeon R9 M385X should be a lot (more or less 633%) better at full screen anti-aliasing than the Radeon HD 4550 256MB, and also will be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M385X		17600 Mpixels/sec
Radeon HD 4550 256MB		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 data (in units of MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better 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 a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 reach the max fill rate.