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Radeon HD 5550 vs Radeon HD 6450 (OEM)

Intro

The Radeon HD 5550 comes with a GPU core clock speed of 550 MHz, and the 512 MB of DDR2 RAM is set to run at 400 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 16 TAUs, and 8 ROPs.

Compare all of that to the Radeon HD 6450 (OEM), which 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 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have the exact same bandwidth, so in theory they should have identical performance. (explain)

Texel Rate

The Radeon HD 5550 will be a lot (approximately 76%) better at AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 5550 8800 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 3800 (76%)

Pixel Rate

The Radeon HD 5550 is quite a bit (more or less 76%) better at full screen anti-aliasing than the Radeon HD 6450 (OEM), and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 5550 4400 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 1900 (76%)

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 5550

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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.

Specifications

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Model Radeon HD 5550 Radeon HD 6450 (OEM)
Manufacturer AMD AMD
Year February 9, 2010 February 2011
Code Name Redwood LE Caicos
Memory 512 MB 512 MB
Core Speed 550 MHz 625 MHz
Memory Speed 800 MHz 1600 MHz
Power (Max TDP) (Unknown) watts 31 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 8800 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 4400 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 320(64x5) 160
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type DDR2 GDDR3
Bus Width 128-bit 64-bit
Fab Process 40 nm 40 nm
Transistors 627 million 370 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video 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 Render Output Units by the the core speed of the card. 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 output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 5550

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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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