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Radeon HD 6450 (OEM) vs Radeon RX 580

Intro

The Radeon HD 6450 (OEM) comes with clock speeds of 625 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 160 SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Compare all of that to the Radeon RX 580, which features GPU clock speed of 1257 MHz, and 8192 MB of GDDR5 RAM set to run at 2000 MHz through a 256-bit bus. It also is made up of 2304 SPUs, 144 TAUs, and 32 Raster Operation Units.

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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 speaking, the Radeon RX 580 should perform a lot faster than the Radeon HD 6450 (OEM) overall. (explain)

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

Texel Rate

The Radeon RX 580 will be much (approximately 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 is quite a bit (more or less 1509%) better at full screen anti-aliasing than the Radeon HD 6450 (OEM), and also will be able to handle higher resolutions better. (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

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Radeon HD 6450 (OEM)

Amazon.com

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Radeon RX 580

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 6450 (OEM) Radeon RX 580
Manufacturer AMD AMD
Year February 2011 April 2017
Code Name Caicos Polaris 20
Memory 512 MB 8192 MB
Core Speed 625 MHz 1257 MHz
Memory Speed 1600 MHz 8000 MHz
Power (Max TDP) 31 watts 185 watts
Bandwidth 12800 MB/sec 262144 MB/sec
Texel Rate 5000 Mtexels/sec 181008 Mtexels/sec
Pixel Rate 2500 Mpixels/sec 40224 Mpixels/sec
Unified Shaders 160 2304
Texture Mapping Units 8 144
Render Output Units 4 32
Bus Type GDDR3 GDDR5
Bus Width 64-bit 256-bit
Fab Process 40 nm 14 nm
Transistors 370 million 5700 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 4.1 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate 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 drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 6450 (OEM)

Amazon.com

Check prices at:

Radeon RX 580

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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