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Radeon HD 3650 vs Radeon HD 4670 512MB

Intro

The Radeon HD 3650 makes use of a 55 nm design. AMD has clocked the core speed at 725 MHz. The GDDR4 RAM is set to run at a frequency of 800 MHz on this model. It features 120(24x5) SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Compare all of that to the Radeon HD 4670 512MB, which makes use of a 55 nm design. AMD has clocked the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 RAM runs at a frequency of 1000 MHz on this card. It features 320(64x5) SPUs as well as 32 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Radeon HD 4670 512MB should theoretically be quite a bit better than the Radeon HD 3650 in general. (explain)

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

Texel Rate

The Radeon HD 4670 512MB will be quite a bit (about 314%) better at anisotropic filtering than the Radeon HD 3650. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 4670 512MB is the winner, by far. (explain)

Radeon HD 4670 512MB 6000 Mpixels/sec
Radeon HD 3650 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

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 Radeon HD 4670 512MB
Manufacturer AMD AMD
Year 2008 Sep 10, 2008
Code Name RV635 PRO RV730 XT
Memory 1024 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 GDDR4 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 max amount of information (measured in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, the result 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3650

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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