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Radeon HD 3470 256MB vs Radeon HD 3650 512MB

Intro

The Radeon HD 3470 256MB makes use of a 55 nm design. AMD has set the core frequency at 800 MHz. The DDR2 RAM is set to run at a speed of 950 MHz on this model. It features 40(8x5) SPUs as well as 4 Texture Address Units and 4 Rasterization Operator Units.

Compare those specifications to the Radeon HD 3650 512MB, which features core speeds of 725 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 120(24x5) SPUs as well as 8 TAUs and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3470 256MB, in theory, should perform a bit faster than the Radeon HD 3650 512MB in general. (explain)

Radeon HD 3470 256MB 30400 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 4800 (19%)

Texel Rate

The Radeon HD 3650 512MB is quite a bit (about 81%) better at AF than the Radeon HD 3470 256MB. (explain)

Radeon HD 3650 512MB 5800 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 2600 (81%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 3470 256MB is a better choice, though not by far. (explain)

Radeon HD 3470 256MB 3200 Mpixels/sec
Radeon HD 3650 512MB 2900 Mpixels/sec
Difference: 300 (10%)

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 3470 256MB

Amazon.com

Check prices at:

Radeon HD 3650 512MB

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 3470 256MB Radeon HD 3650 512MB
Manufacturer AMD AMD
Year 2008 2008
Code Name RV620 PRO RV635 PRO
Memory 256 MB 512 MB
Core Speed 800 MHz 725 MHz
Memory Speed 1900 MHz 1600 MHz
Power (Max TDP) (Unknown) watts 78 watts
Bandwidth 30400 MB/sec 25600 MB/sec
Texel Rate 3200 Mtexels/sec 5800 Mtexels/sec
Pixel Rate 3200 Mpixels/sec 2900 Mpixels/sec
Unified Shaders 40(8x5) 120(24x5)
Texture Mapping Units 4 8
Render Output Units 4 4
Bus Type DDR2 GDDR3
Bus Width 128-bit 128-bit
Fab Process 55 nm 55 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 2.0 x16 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved across the external memory interface in a second. It's 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 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's 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 potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 3470 256MB

Amazon.com

Check prices at:

Radeon HD 3650 512MB

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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