Radeon HD 6450 (OEM) vs Radeon RX 470 4GB

Intro

Compare that to the Radeon RX 470 4GB, which comes with a clock frequency of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also makes use of a 256-bit bus, and makes use of a 14 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM)		31 Watts
Radeon RX 470 4GB		120 Watts
	Difference: 89 Watts (287%)

Memory Bandwidth

Theoretically, the Radeon RX 470 4GB should be much faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon RX 470 4GB		211200 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 198400 (1550%)

Texel Rate

The Radeon RX 470 4GB will be quite a bit (approximately 2271%) more effective at texture filtering than the Radeon HD 6450 (OEM). (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 113528 (2271%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 470 4GB is the winner, by a large margin. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 27132 (1085%)

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 largest amount of data (measured in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.