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Radeon HD 3650 vs Radeon HD 6750

Intro

The Radeon HD 3650 makes use of a 55 nm design. AMD has clocked the core speed at 725 MHz. The GDDR4 memory works at a frequency of 800 MHz on this specific model. It features 120(24x5) SPUs along with 8 TAUs and 4 ROPs.

Compare those specifications to the Radeon HD 6750, which has a core clock speed of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It features 720 SPUs, 36 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 78 Watts
Radeon HD 6750 86 Watts
Difference: 8 Watts (10%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6750 should theoretically be much superior to the Radeon HD 3650 overall. (explain)

Radeon HD 6750 64000 MB/sec
Radeon HD 3650 25600 MB/sec
Difference: 38400 (150%)

Texel Rate

The Radeon HD 6750 is much (approximately 350%) more effective at texture filtering than the Radeon HD 3650. (explain)

Radeon HD 6750 26100 Mtexels/sec
Radeon HD 3650 5800 Mtexels/sec
Difference: 20300 (350%)

Pixel Rate

The Radeon HD 6750 should be quite a bit (more or less 300%) more effective at full screen anti-aliasing than the Radeon HD 3650, and should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6750 11600 Mpixels/sec
Radeon HD 3650 2900 Mpixels/sec
Difference: 8700 (300%)

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 6750

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 6750
Manufacturer AMD AMD
Year 2008 January 2011
Code Name RV635 PRO Juniper Pro
Memory 1024 MB 512 MB
Core Speed 725 MHz 725 MHz
Memory Speed 1600 MHz 4000 MHz
Power (Max TDP) 78 watts 86 watts
Bandwidth 25600 MB/sec 64000 MB/sec
Texel Rate 5800 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 2900 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 120(24x5) 720
Texture Mapping Units 8 36
Render Output Units 4 16
Bus Type GDDR4 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 1040 million
Bus PCIe 2.0 x16/AGP 8x PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - 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 6750

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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