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Radeon HD 3650 256MB vs Radeon HD 6450 (OEM) 1GB

Intro

The Radeon HD 3650 256MB uses a 55 nm design. AMD has clocked the core speed at 725 MHz. The DDR2 memory is set to run at a speed of 800 MHz on this card. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 ROPs.

Compare all of that to the Radeon HD 6450 (OEM) 1GB, which comes with clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 160 SPUs as well as 8 Texture Address Units and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB 31 Watts
Radeon HD 3650 256MB 78 Watts
Difference: 47 Watts (152%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6450 (OEM) 1GB should be a small bit faster than the Radeon HD 3650 256MB in general. (explain)

Radeon HD 6450 (OEM) 1GB 28800 MB/sec
Radeon HD 3650 256MB 25600 MB/sec
Difference: 3200 (13%)

Texel Rate

The Radeon HD 6450 (OEM) 1GB is a bit (more or less 3%) faster with regards to anisotropic filtering than the Radeon HD 3650 256MB. (explain)

Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Radeon HD 3650 256MB 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 full screen anti-aliasing than the Radeon HD 3650 256MB, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
Radeon HD 3650 256MB 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 256MB

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 256MB Radeon HD 6450 (OEM) 1GB
Manufacturer AMD AMD
Year 2008 February 2011
Code Name RV635 PRO Caicos
Memory 256 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 DDR2 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 max amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the 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 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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