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Radeon HD 3650 512MB vs Radeon HD 6950

Intro

The Radeon HD 3650 512MB features core clock speeds of 725 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 120(24x5) SPUs as well as 8 TAUs and 4 ROPs.

Compare all of that to the Radeon HD 6950, which uses a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1250 MHz on this card. It features 1408 SPUs along with 88 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB 78 Watts
Radeon HD 6950 200 Watts
Difference: 122 Watts (156%)

Memory Bandwidth

The Radeon HD 6950, in theory, should perform a lot faster than the Radeon HD 3650 512MB overall. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 134400 (525%)

Texel Rate

The Radeon HD 6950 should be much (more or less 1114%) better at anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 64600 (1114%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6950 is a better choice, by far. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 3650 512MB 2900 Mpixels/sec
Difference: 22700 (783%)

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 3650 512MB

Amazon.com

Check prices at:

Radeon HD 6950

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 3650 512MB Radeon HD 6950
Manufacturer AMD AMD
Year 2008 December 2010
Code Name RV635 PRO Cayman Pro
Memory 512 MB 1024 MB
Core Speed 725 MHz 800 MHz
Memory Speed 1600 MHz 5000 MHz
Power (Max TDP) 78 watts 200 watts
Bandwidth 25600 MB/sec 160000 MB/sec
Texel Rate 5800 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 120(24x5) 1408
Texture Mapping Units 8 88
Render Output Units 4 32
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 2640 million
Bus PCIe 2.0 x16/AGP 8x PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3650 512MB

Amazon.com

Check prices at:

Radeon HD 6950

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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