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Radeon HD 3470 256MB vs Radeon HD 3650 512MB

Intro

The Radeon HD 3470 256MB features a clock frequency of 800 MHz and a DDR2 memory speed of 950 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It features 40(8x5) SPUs, 4 Texture Address Units, and 4 ROPs.

Compare all of that to the Radeon HD 3650 512MB, which comes with a clock speed of 725 MHz and a GDDR3 memory frequency of 800 MHz. It also makes use of a 128-bit memory bus, and uses a 55 nm design. It features 120(24x5) SPUs, 8 TAUs, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3470 256MB is 19% quicker than the Radeon HD 3650 512MB overall, due to its greater bandwidth. (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 will be a lot (more or less 81%) faster with regards to anisotropic filtering 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 superior to the Radeon HD 3650 512MB, but 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

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Radeon HD 3650 512MB

Amazon.com

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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: Bandwidth is the max amount of information (in units of MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour 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 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 maximum 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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