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Radeon HD 3650 256MB vs Radeon HD 6670 (OEM)

Intro

The Radeon HD 3650 256MB comes with a GPU clock speed of 725 MHz, and the 256 MB of DDR2 memory is set to run at 800 MHz through a 128-bit bus. It also is made up of 120(24x5) Stream Processors, 8 TAUs, and 4 ROPs.

Compare all of that to the Radeon HD 6670 (OEM), which comes with GPU core speed of 800 MHz, and 512 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also is comprised of 480 SPUs, 24 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 63 Watts
Radeon HD 3650 256MB 78 Watts
Difference: 15 Watts (24%)

Memory Bandwidth

Performance-wise, the Radeon HD 6670 (OEM) should in theory be a lot superior to the Radeon HD 3650 256MB in general. (explain)

Radeon HD 6670 (OEM) 64000 MB/sec
Radeon HD 3650 256MB 25600 MB/sec
Difference: 38400 (150%)

Texel Rate

The Radeon HD 6670 (OEM) is quite a bit (more or less 231%) faster with regards to AF than the Radeon HD 3650 256MB. (explain)

Radeon HD 6670 (OEM) 19200 Mtexels/sec
Radeon HD 3650 256MB 5800 Mtexels/sec
Difference: 13400 (231%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6670 (OEM) is the winner, by a large margin. (explain)

Radeon HD 6670 (OEM) 6400 Mpixels/sec
Radeon HD 3650 256MB 2900 Mpixels/sec
Difference: 3500 (121%)

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 256MB

Amazon.com

Check prices at:

Radeon HD 6670 (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 3650 256MB Radeon HD 6670 (OEM)
Manufacturer AMD AMD
Year 2008 February 2011
Code Name RV635 PRO Turks
Memory 256 MB 512 MB
Core Speed 725 MHz 800 MHz
Memory Speed 1600 MHz 4000 MHz
Power (Max TDP) 78 watts 63 watts
Bandwidth 25600 MB/sec 64000 MB/sec
Texel Rate 5800 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 120(24x5) 480
Texture Mapping Units 8 24
Render Output Units 4 8
Bus Type DDR2 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 715 million
Bus PCIe 2.0 x16/AGP 8x PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 3650 256MB

Amazon.com

Check prices at:

Radeon HD 6670 (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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