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Radeon HD 5450 vs Radeon HD 6450 (OEM)

Intro

The Radeon HD 5450 has clock speeds of 650 MHz on the GPU, and 800 MHz on the 512 MB of DDR3 RAM. It features 80(16x5) SPUs along with 8 TAUs and 4 ROPs.

Compare those specs to the Radeon HD 6450 (OEM), which features a clock speed of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also features a 64-bit memory bus, and uses a 40 nm design. It features 160 SPUs, 8 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
Radeon HD 6450 (OEM) 31 Watts
Difference: 12 Watts (63%)

Memory Bandwidth

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

Texel Rate

The Radeon HD 5450 should be just a bit (approximately 4%) faster with regards to AF than the Radeon HD 6450 (OEM). (explain)

Radeon HD 5450 5200 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 200 (4%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5450 is a better choice, though not by far. (explain)

Radeon HD 5450 2600 Mpixels/sec
Radeon HD 6450 (OEM) 2500 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 5450

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 5450 Radeon HD 6450 (OEM)
Manufacturer AMD AMD
Year February 4, 2010 February 2011
Code Name Cedar PRO Caicos
Memory 512 MB 512 MB
Core Speed 650 MHz 625 MHz
Memory Speed 1600 MHz 1600 MHz
Power (Max TDP) 19 watts 31 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 5200 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 80(16x5) 160
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type DDR3 GDDR3
Bus Width 64-bit 64-bit
Fab Process 40 nm 40 nm
Transistors 292 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: Bandwidth is the largest amount of information (counted in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 5450

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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