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

Intro

The Radeon HD 4550 512MB features clock speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 80(16x5) SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Compare that to the Radeon HD 6450 (OEM), which has a GPU core clock speed of 625 MHz, and 512 MB of GDDR3 RAM running at 800 MHz through a 64-bit bus. It also is comprised of 160 Stream Processors, 8 TAUs, and 4 Raster Operation 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 bandwidth, so in theory they should perform the same. (explain)

Texel Rate

The Radeon HD 6450 (OEM) is just a bit (more or less 4%) faster with regards to AF 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 superior to the Radeon HD 4550 512MB, not by a very large margin though. (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 max amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends 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

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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