Radeon HD 6450 (OEM) vs Radeon RX 580

Intro

Compare those specifications to the Radeon RX 580, which has a clock speed of 1257 MHz and a GDDR5 memory speed of 2000 MHz. It also features a 256-bit bus, and uses a 14 nm design. It is made up of 2304 SPUs, 144 TAUs, and 32 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 580		13630 points
Radeon HD 6450 (OEM)		340 points
	Difference: 13290 (3909%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon RX 580 should be much faster than the Radeon HD 6450 (OEM) in general. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 6450 (OEM)		12800 MB/sec
	Difference: 249344 (1948%)

Texel Rate

The Radeon RX 580 is much (more or less 3520%) better at AF than the Radeon HD 6450 (OEM). (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 6450 (OEM)		5000 Mtexels/sec
	Difference: 176008 (3520%)

Pixel Rate

The Radeon RX 580 will be much (approximately 1509%) more effective at AA than the Radeon HD 6450 (OEM), and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 6450 (OEM)		2500 Mpixels/sec
	Difference: 37724 (1509%)

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 largest amount of data (measured in megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 processed in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). 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 ability to reach the max fill rate.