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Radeon HD 3650 vs Radeon HD 6450 (OEM)

Intro

The Radeon HD 3650 has a core clock frequency of 725 MHz and a GDDR4 memory frequency of 800 MHz. It also uses a 128-bit bus, and uses a 55 nm design. It features 120(24x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

Compare all of that to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has set the core speed at 625 MHz. The GDDR3 memory is set to run at a speed of 800 MHz on this particular card. It features 160 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon HD 3650 should in theory be quite a bit faster than the Radeon HD 6450 (OEM) overall. (explain)

Radeon HD 3650 25600 MB/sec
Radeon HD 6450 (OEM) 12800 MB/sec
Difference: 12800 (100%)

Texel Rate

The Radeon HD 3650 will be a little bit (about 16%) more effective at anisotropic filtering than the Radeon HD 6450 (OEM). (explain)

Radeon HD 3650 5800 Mtexels/sec
Radeon HD 6450 (OEM) 5000 Mtexels/sec
Difference: 800 (16%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 3650 is the winner, but not by far. (explain)

Radeon HD 3650 2900 Mpixels/sec
Radeon HD 6450 (OEM) 2500 Mpixels/sec
Difference: 400 (16%)

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)

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)
Manufacturer AMD AMD
Year 2008 February 2011
Code Name RV635 PRO Caicos
Memory 1024 MB 512 MB
Core Speed 725 MHz 625 MHz
Memory Speed 1600 MHz 1600 MHz
Power (Max TDP) 78 watts 31 watts
Bandwidth 25600 MB/sec 12800 MB/sec
Texel Rate 5800 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 120(24x5) 160
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type GDDR4 GDDR3
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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, 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 card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3650

Amazon.com

Check prices at:

Radeon HD 6450 (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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