Radeon HD 6850 vs Radeon RX 580

Intro

Compare those specifications to the Radeon RX 580, which has core speeds of 1257 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs along with 144 TAUs and 32 Rasterization Operator 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 6850		2395 points
	Difference: 11235 (469%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850		127 Watts
Radeon RX 580		185 Watts
	Difference: 58 Watts (46%)

Memory Bandwidth

Performance-wise, the Radeon RX 580 should in theory be much superior to the Radeon HD 6850 in general. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 6850		128000 MB/sec
	Difference: 134144 (105%)

Texel Rate

The Radeon RX 580 should be quite a bit (about 387%) better at AF than the Radeon HD 6850. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 6850		37200 Mtexels/sec
	Difference: 143808 (387%)

Pixel Rate

The Radeon RX 580 should be much (approximately 62%) more effective at full screen anti-aliasing than the Radeon HD 6850, and should be capable of handling higher resolutions better. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 6850		24800 Mpixels/sec
	Difference: 15424 (62%)

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 information (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.