Radeon HD 6450 (OEM) 1GB vs Radeon RX 580

Intro

Compare that to the Radeon RX 580, which comes with core clock speeds of 1257 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs as well as 144 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon RX 580		185 Watts
	Difference: 154 Watts (497%)

Memory Bandwidth

Performance-wise, the Radeon RX 580 should theoretically be quite a bit superior to the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 233344 (810%)

Texel Rate

The Radeon RX 580 will be quite a bit (more or less 2917%) faster with regards to texture filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 175008 (2917%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 580 is superior to the Radeon HD 6450 (OEM) 1GB, and very much so. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 37224 (1241%)

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 transported past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range 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 is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.