Radeon HD 6450 (OEM) 1GB vs Radeon RX 480

Intro

Compare all that to the Radeon RX 480, which features a core clock frequency of 1120 MHz and a GDDR5 memory frequency of 2000 MHz. It also makes use of a 256-bit bus, and uses a 14 nm design. It is made up of 2304 SPUs, 144 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon RX 480		150 Watts
	Difference: 119 Watts (384%)

Memory Bandwidth

Performance-wise, the Radeon RX 480 should theoretically be quite a bit better than the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon RX 480		262144 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 233344 (810%)

Texel Rate

The Radeon RX 480 will be a lot (more or less 2588%) faster with regards to AF than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon RX 480		161280 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 155280 (2588%)

Pixel Rate

The Radeon RX 480 should be a lot (more or less 1095%) better at full screen anti-aliasing than the Radeon HD 6450 (OEM) 1GB, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon RX 480		35840 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 32840 (1095%)

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 max amount of data (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.