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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 runs at a speed of 800 MHz on this particular model. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 ROPs.

Compare those specs to the Radeon HD 6450 (OEM) 1GB, which features a clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 64-bit memory bus, and makes use of a 40 nm design. It is made up of 160 SPUs, 8 TAUs, 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

In theory, the Radeon HD 6450 (OEM) 1GB should perform a little bit faster than the Radeon HD 3650 256MB overall. (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 small bit (approximately 3%) faster with regards to texture 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

If using lots of anti-aliasing is important to you, then the Radeon HD 6450 (OEM) 1GB is a better choice, but only just. (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 largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to 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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