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GeForce 8600 GT 1GB GDDR3 vs Radeon HD 3690/3830

Intro

The GeForce 8600 GT 1GB GDDR3 has clock speeds of 540 MHz on the GPU, and 700 MHz on the 1024 MB of GDDR3 memory. It features 32 SPUs along with 16 TAUs and 8 Rasterization Operator Units.

Compare those specs to the Radeon HD 3690/3830, which features a core clock speed of 668 MHz and a GDDR3 memory speed of 828 MHz. It also uses a 128-bit memory bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 16 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 1GB GDDR3 47 Watts
Radeon HD 3690/3830 75 Watts
Difference: 28 Watts (60%)

Memory Bandwidth

Theoretically, the Radeon HD 3690/3830 should perform a little bit faster than the GeForce 8600 GT 1GB GDDR3 in general. (explain)

Radeon HD 3690/3830 26496 MB/sec
GeForce 8600 GT 1GB GDDR3 22400 MB/sec
Difference: 4096 (18%)

Texel Rate

The Radeon HD 3690/3830 should be quite a bit (more or less 24%) more effective at anisotropic filtering than the GeForce 8600 GT 1GB GDDR3. (explain)

Radeon HD 3690/3830 10688 Mtexels/sec
GeForce 8600 GT 1GB GDDR3 8640 Mtexels/sec
Difference: 2048 (24%)

Pixel Rate

The Radeon HD 3690/3830 will be a lot (about 147%) faster with regards to AA than the GeForce 8600 GT 1GB GDDR3, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 3690/3830 10688 Mpixels/sec
GeForce 8600 GT 1GB GDDR3 4320 Mpixels/sec
Difference: 6368 (147%)

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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GeForce 8600 GT 1GB GDDR3

Amazon.com

Check prices at:

Radeon HD 3690/3830

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 GeForce 8600 GT 1GB GDDR3 Radeon HD 3690/3830
Manufacturer nVidia AMD
Year April 2007 2008
Code Name G84 RV670 PRO
Memory 1024 MB 256 MB
Core Speed 540 MHz 668 MHz
Memory Speed 1400 MHz 1656 MHz
Power (Max TDP) 47 watts 75 watts
Bandwidth 22400 MB/sec 26496 MB/sec
Texel Rate 8640 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 32 320(64x5)
Texture Mapping Units 16 16
Render Output Units 8 16
Bus Type GDDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 80 nm 55 nm
Transistors 289 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the card will be at handling 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 could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 1GB GDDR3

Amazon.com

Check prices at:

Radeon HD 3690/3830

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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