Radeon HD 4550 512MB vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which makes use of a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this specific card. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
Radeon R9 M390X		125 Watts
	Difference: 100 Watts (400%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be 1150% quicker than the Radeon HD 4550 512MB in general, due to its greater data rate. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 147200 (1150%)

Texel Rate

The Radeon R9 M390X will be a lot (about 1828%) faster with regards to AF than the Radeon HD 4550 512MB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 87744 (1828%)

Pixel Rate

The Radeon R9 M390X should be a lot (approximately 864%) better at full screen anti-aliasing than the Radeon HD 4550 512MB, and will be able to handle higher resolutions while still performing well. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 20736 (864%)

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 largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most 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 calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.