Radeon HD 5450 vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which makes use of a 28 nm design. AMD has clocked the core speed at 723 MHz. The GDDR5 memory works at a speed of 1250 MHz on this model. 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 5450		19 Watts
Radeon R9 M390X		125 Watts
	Difference: 106 Watts (558%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X is 1150% quicker than the Radeon HD 5450 overall, because of its greater data rate. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 147200 (1150%)

Texel Rate

The Radeon R9 M390X is a lot (more or less 1680%) more effective at texture filtering than the Radeon HD 5450. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 87344 (1680%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 M390X is superior to the Radeon HD 5450, and very much so. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 20536 (790%)

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 max amount of data (measured in MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.