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Radeon HD 6450 (OEM) vs Radeon HD 6850

Intro

The Radeon HD 6450 (OEM) makes use of a 40 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR3 RAM works at a frequency of 800 MHz on this model. It features 160 SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6850, which comes with GPU clock speed of 775 MHz, and 1024 MB of GDDR5 memory running at 1000 MHz through a 256-bit bus. It also is made up of 960 SPUs, 48 TAUs, and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6850 2395 points
Radeon HD 6450 (OEM) 340 points
Difference: 2055 (604%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
Radeon HD 6850 127 Watts
Difference: 96 Watts (310%)

Memory Bandwidth

The Radeon HD 6850 should in theory perform quite a bit faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 6850 128000 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 115200 (900%)

Texel Rate

The Radeon HD 6850 is a lot (approximately 644%) better at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 6850 37200 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 32200 (644%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6850 is superior to the Radeon HD 6450 (OEM), by a large margin. (explain)

Radeon HD 6850 24800 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 22300 (892%)

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)

Amazon.com

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Radeon HD 6850

Amazon.com

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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) Radeon HD 6850
Manufacturer AMD AMD
Year February 2011 October 2010
Code Name Caicos Barts Pro
Memory 512 MB 1024 MB
Core Speed 625 MHz 775 MHz
Memory Speed 1600 MHz 4000 MHz
Power (Max TDP) 31 watts 127 watts
Bandwidth 12800 MB/sec 128000 MB/sec
Texel Rate 5000 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 2500 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 160 960
Texture Mapping Units 8 48
Render Output Units 4 32
Bus Type GDDR3 GDDR5
Bus Width 64-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 370 million 1700 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 information (in units of megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 6450 (OEM)

Amazon.com

Check prices at:

Radeon HD 6850

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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