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Radeon HD 3650 512MB vs Radeon HD 6450 (OEM) 1GB

Intro

The Radeon HD 3650 512MB uses a 55 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR3 RAM is set to run at a frequency of 800 MHz on this specific model. It features 120(24x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Compare all that to the Radeon HD 6450 (OEM) 1GB, which has a clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also features a 64-bit bus, and makes use of a 40 nm design. It features 160 SPUs, 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 512MB 78 Watts
Difference: 47 Watts (152%)

Memory Bandwidth

In theory, the Radeon HD 6450 (OEM) 1GB should be a bit faster than the Radeon HD 3650 512MB in general. (explain)

Radeon HD 6450 (OEM) 1GB 28800 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 3200 (13%)

Texel Rate

The Radeon HD 6450 (OEM) 1GB is just a bit (about 3%) better at anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon HD 6450 (OEM) 1GB 6000 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 200 (3%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6450 (OEM) 1GB is superior to the Radeon HD 3650 512MB, not by a very large margin though. (explain)

Radeon HD 6450 (OEM) 1GB 3000 Mpixels/sec
Radeon HD 3650 512MB 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 512MB

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 512MB Radeon HD 6450 (OEM) 1GB
Manufacturer AMD AMD
Year 2008 February 2011
Code Name RV635 PRO Caicos
Memory 512 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 GDDR3 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 maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number 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 filling the screen with pixels (the image). The actual pixel fill 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 get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3650 512MB

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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