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Radeon HD 3690/3830 vs Radeon HD 6770 1GB

Intro

The Radeon HD 3690/3830 uses a 55 nm design. AMD has clocked the core speed at 668 MHz. The GDDR3 memory works at a frequency of 828 MHz on this specific model. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

Compare those specs to the Radeon HD 6770 1GB, which comes with a GPU core clock speed of 900 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also is comprised of 800 SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830 75 Watts
Radeon HD 6770 1GB 108 Watts
Difference: 33 Watts (44%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6770 1GB should theoretically be much better than the Radeon HD 3690/3830 overall. (explain)

Radeon HD 6770 1GB 67200 MB/sec
Radeon HD 3690/3830 26496 MB/sec
Difference: 40704 (154%)

Texel Rate

The Radeon HD 6770 1GB should be much (more or less 237%) faster with regards to texture filtering than the Radeon HD 3690/3830. (explain)

Radeon HD 6770 1GB 36000 Mtexels/sec
Radeon HD 3690/3830 10688 Mtexels/sec
Difference: 25312 (237%)

Pixel Rate

The Radeon HD 6770 1GB should be a lot (more or less 35%) more effective at anti-aliasing than the Radeon HD 3690/3830, and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6770 1GB 14400 Mpixels/sec
Radeon HD 3690/3830 10688 Mpixels/sec
Difference: 3712 (35%)

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 3690/3830

Amazon.com

Check prices at:

Radeon HD 6770 1GB

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 3690/3830 Radeon HD 6770 1GB
Manufacturer AMD AMD
Year 2008 January 2011
Code Name RV670 PRO Juniper XT
Memory 256 MB 1024 MB
Core Speed 668 MHz 900 MHz
Memory Speed 1656 MHz 4200 MHz
Power (Max TDP) 75 watts 108 watts
Bandwidth 26496 MB/sec 67200 MB/sec
Texel Rate 10688 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 10688 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 320(64x5) 800
Texture Mapping Units 16 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 1040 million
Bus PCIe 2.0 x16 PCIe x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

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

Display Prices

Hide Prices

Radeon HD 3690/3830

Amazon.com

Check prices at:

Radeon HD 6770 1GB

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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