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Radeon HD 3650 vs Radeon HD 6450 (OEM) 1GB

Intro

The Radeon HD 3650 comes with a GPU clock speed of 725 MHz, and the 1024 MB of GDDR4 RAM 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 Raster Operation Units.

Compare that to the Radeon HD 6450 (OEM) 1GB, which features a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 memory set to run at 900 MHz through a 64-bit bus. It also features 160 Stream Processors, 8 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB 31 Watts
Radeon HD 3650 78 Watts
Difference: 47 Watts (152%)

Memory Bandwidth

The Radeon HD 6450 (OEM) 1GB should theoretically be a bit faster than the Radeon HD 3650 overall. (explain)

Radeon HD 6450 (OEM) 1GB 28800 MB/sec
Radeon HD 3650 25600 MB/sec
Difference: 3200 (13%)

Texel Rate

The Radeon HD 6450 (OEM) 1GB should be a bit (about 3%) better at anisotropic filtering than the Radeon HD 3650. (explain)

Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Radeon HD 3650 5800 Mtexels/sec
Difference: 200 (3%)

Pixel Rate

The Radeon HD 6450 (OEM) 1GB should be just a bit (more or less 3%) better at AA than the Radeon HD 3650, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
Radeon HD 3650 2900 Mpixels/sec
Difference: 100 (3%)

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

Amazon.com

Check prices at:

Radeon HD 6450 (OEM) 1GB

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 Radeon HD 6450 (OEM) 1GB
Manufacturer AMD AMD
Year 2008 February 2011
Code Name RV635 PRO Caicos
Memory 1024 MB 1024 MB
Core Speed 725 MHz 750 MHz
Memory Speed 1600 MHz 3600 MHz
Power (Max TDP) 78 watts 31 watts
Bandwidth 25600 MB/sec 28800 MB/sec
Texel Rate 5800 Mtexels/sec 6000 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 3000 Mpixels/sec
Unified Shaders 120(24x5) 160
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type GDDR4 GDDR5
Bus Width 128-bit 64-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 370 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: Bandwidth is the largest amount of information (measured in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 3650

Amazon.com

Check prices at:

Radeon HD 6450 (OEM) 1GB

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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