Radeon HD 6450 (OEM) 1GB vs Radeon RX 480 4GB

Intro

Compare all that to the Radeon RX 480 4GB, which has GPU clock speed of 1120 MHz, and 4096 MB of GDDR5 memory set to run at 1750 MHz through a 256-bit bus. It also is made up of 2304 Stream Processors, 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 4GB		150 Watts
	Difference: 119 Watts (384%)

Memory Bandwidth

The Radeon RX 480 4GB, in theory, should be quite a bit faster than the Radeon HD 6450 (OEM) 1GB in general. (explain)

Radeon RX 480 4GB		229376 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 200576 (696%)

Texel Rate

The Radeon RX 480 4GB is quite a bit (more or less 2588%) better at anisotropic filtering than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 155280 (2588%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 480 4GB is a better choice, by far. (explain)

Radeon RX 480 4GB		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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of 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 that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.