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

Intro

The Radeon HD 6450 (OEM) 1GB uses a 40 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory is set to run at a speed of 900 MHz on this specific card. It features 160 SPUs as well as 8 TAUs and 4 ROPs.

Compare those specs to the Radeon HD 6950 2GB, which features core 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 TAUs 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

In theory, the Radeon HD 6950 2GB will be 456% quicker than the Radeon HD 6450 (OEM) 1GB overall, because of its higher data rate. (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 much (more or less 1073%) faster with regards to texture filtering 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 lots of anti-aliasing is important to you, then the Radeon HD 6950 2GB is superior to the Radeon HD 6450 (OEM) 1GB, 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

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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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max 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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