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Radeon HD 6450 (OEM) 1GB vs Radeon HD 6950 2GB

Intro

The Radeon HD 6450 (OEM) 1GB features a core clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 64-bit memory bus, and uses a 40 nm design. It is made up of 160 SPUs, 8 TAUs, and 4 ROPs.

Compare those specifications to the Radeon HD 6950 2GB, which features core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 1408 SPUs as well as 88 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB 31 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 169 Watts (545%)

Memory Bandwidth

The Radeon HD 6950 2GB should theoretically perform quite a bit faster than the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon HD 6950 2GB 160000 MB/sec
Radeon HD 6450 (OEM) 1GB 28800 MB/sec
Difference: 131200 (456%)

Texel Rate

The Radeon HD 6950 2GB is quite a bit (more or less 1073%) more effective at AF than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Difference: 64400 (1073%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6950 2GB is the winner, by far. (explain)

Radeon HD 6950 2GB 25600 Mpixels/sec
Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
Difference: 22600 (753%)

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) 1GB

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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 6450 (OEM) 1GB Radeon HD 6950 2GB
Manufacturer AMD AMD
Year February 2011 December 2010
Code Name Caicos Cayman Pro
Memory 1024 MB 2048 MB
Core Speed 750 MHz 800 MHz
Memory Speed 3600 MHz 5000 MHz
Power (Max TDP) 31 watts 200 watts
Bandwidth 28800 MB/sec 160000 MB/sec
Texel Rate 6000 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 3000 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 160 1408
Texture Mapping Units 8 88
Render Output Units 4 32
Bus Type GDDR5 GDDR5
Bus Width 64-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 370 million 2640 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 are applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6450 (OEM) 1GB

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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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