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Radeon HD 4550 512MB vs Radeon HD 6450 (OEM)

Intro

The Radeon HD 4550 512MB makes use of a 55 nm design. AMD has clocked the core frequency at 600 MHz. The GDDR3 RAM runs at a frequency of 800 MHz on this specific card. It features 80(16x5) SPUs along with 8 TAUs and 4 ROPs.

Compare all that to the Radeon HD 6450 (OEM), which makes use of a 40 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR3 RAM is set to run at a frequency of 800 MHz on this card. It features 160 SPUs along with 8 TAUs and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB 25 Watts
Radeon HD 6450 (OEM) 31 Watts
Difference: 6 Watts (24%)

Memory Bandwidth

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

Texel Rate

The Radeon HD 6450 (OEM) will be a little bit (approximately 4%) more effective at anisotropic filtering than the Radeon HD 4550 512MB. (explain)

Radeon HD 6450 (OEM) 5000 Mtexels/sec
Radeon HD 4550 512MB 4800 Mtexels/sec
Difference: 200 (4%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6450 (OEM) is the winner, but not by far. (explain)

Radeon HD 6450 (OEM) 2500 Mpixels/sec
Radeon HD 4550 512MB 2400 Mpixels/sec
Difference: 100 (4%)

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 4550 512MB

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 4550 512MB Radeon HD 6450 (OEM)
Manufacturer AMD AMD
Year Sep 30, 2008 February 2011
Code Name RV710 Caicos
Memory 512 MB 512 MB
Core Speed 600 MHz 625 MHz
Memory Speed 1600 MHz 1600 MHz
Power (Max TDP) 25 watts 31 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 4800 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 2400 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 80(16x5) 160
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type GDDR3 GDDR3
Bus Width 64-bit 64-bit
Fab Process 55 nm 40 nm
Transistors 242 million 370 million
Bus PCIe 2.0 x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 4550 512MB

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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