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Radeon HD 3650 256MB vs Radeon HD 6570 (OEM) 1GB

Intro

The Radeon HD 3650 256MB features clock speeds of 725 MHz on the GPU, and 800 MHz on the 256 MB of DDR2 RAM. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 ROPs.

Compare those specs to the Radeon HD 6570 (OEM) 1GB, which comes with a core clock frequency of 650 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 480 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 1GB 50 Watts
Radeon HD 3650 256MB 78 Watts
Difference: 28 Watts (56%)

Memory Bandwidth

In theory, the Radeon HD 6570 (OEM) 1GB should be 13% faster than the Radeon HD 3650 256MB in general, due to its higher data rate. (explain)

Radeon HD 6570 (OEM) 1GB 28800 MB/sec
Radeon HD 3650 256MB 25600 MB/sec
Difference: 3200 (13%)

Texel Rate

The Radeon HD 6570 (OEM) 1GB should be much (approximately 169%) better at texture filtering than the Radeon HD 3650 256MB. (explain)

Radeon HD 6570 (OEM) 1GB 15600 Mtexels/sec
Radeon HD 3650 256MB 5800 Mtexels/sec
Difference: 9800 (169%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6570 (OEM) 1GB is the winner, by a large margin. (explain)

Radeon HD 6570 (OEM) 1GB 5200 Mpixels/sec
Radeon HD 3650 256MB 2900 Mpixels/sec
Difference: 2300 (79%)

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 6570 (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 6570 (OEM) 1GB
Manufacturer AMD AMD
Year 2008 February 2011
Code Name RV635 PRO Turks
Memory 256 MB 1024 MB
Core Speed 725 MHz 650 MHz
Memory Speed 1600 MHz 1800 MHz
Power (Max TDP) 78 watts 50 watts
Bandwidth 25600 MB/sec 28800 MB/sec
Texel Rate 5800 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 5200 Mpixels/sec
Unified Shaders 120(24x5) 480
Texture Mapping Units 8 24
Render Output Units 4 8
Bus Type DDR2 GDDR3
Bus Width 128-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 715 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 megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3650 256MB

Amazon.com

Check prices at:

Radeon HD 6570 (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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