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Radeon HD 3650 512MB vs Radeon HD 4670 512MB

Intro

The Radeon HD 3650 512MB has core clock speeds of 725 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Compare that to the Radeon HD 4670 512MB, which has a GPU core clock speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 RAM running at 1000 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 32 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 512MB 70 Watts
Radeon HD 3650 512MB 78 Watts
Difference: 8 Watts (11%)

Memory Bandwidth

In theory, the Radeon HD 4670 512MB is 25% quicker than the Radeon HD 3650 512MB in general, because of its higher data rate. (explain)

Radeon HD 4670 512MB 32000 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 6400 (25%)

Texel Rate

The Radeon HD 4670 512MB will be much (about 314%) faster with regards to texture filtering than the Radeon HD 3650 512MB. (explain)

Radeon HD 4670 512MB 24000 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 18200 (314%)

Pixel Rate

The Radeon HD 4670 512MB will be a lot (about 107%) more effective at full screen anti-aliasing than the Radeon HD 3650 512MB, and also should be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 4670 512MB 6000 Mpixels/sec
Radeon HD 3650 512MB 2900 Mpixels/sec
Difference: 3100 (107%)

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 4670 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 3650 512MB Radeon HD 4670 512MB
Manufacturer AMD AMD
Year 2008 Sep 10, 2008
Code Name RV635 PRO RV730 XT
Memory 512 MB 512 MB
Core Speed 725 MHz 750 MHz
Memory Speed 1600 MHz 2000 MHz
Power (Max TDP) 78 watts 70 watts
Bandwidth 25600 MB/sec 32000 MB/sec
Texel Rate 5800 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 120(24x5) 320(64x5)
Texture Mapping Units 8 32
Render Output Units 4 8
Bus Type GDDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 128-bit 128-bit
Fab Process 55 nm 55 nm
Transistors (Unknown) million 514 million
Bus PCIe 2.0 x16/AGP 8x 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 largest amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3650 512MB

Amazon.com

Check prices at:

Radeon HD 4670 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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