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GeForce 8600 GTS vs Radeon HD 3690/3830

Intro

The GeForce 8600 GTS has a core clock speed of 675 MHz and a GDDR3 memory frequency of 1000 MHz. It also makes use of a 128-bit memory bus, and makes use of a 80 nm design. It is made up of 32 SPUs, 16 TAUs, and 8 ROPs.

Compare all of that to the Radeon HD 3690/3830, which comes with GPU clock speed of 668 MHz, and 256 MB of GDDR3 RAM running at 828 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 16 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The GeForce 8600 GTS, in theory, should perform quite a bit faster than the Radeon HD 3690/3830 in general. (explain)

GeForce 8600 GTS 32000 MB/sec
Radeon HD 3690/3830 26496 MB/sec
Difference: 5504 (21%)

Texel Rate

The GeForce 8600 GTS should be a small bit (more or less 1%) more effective at AF than the Radeon HD 3690/3830. (explain)

GeForce 8600 GTS 10800 Mtexels/sec
Radeon HD 3690/3830 10688 Mtexels/sec
Difference: 112 (1%)

Pixel Rate

The Radeon HD 3690/3830 is much (more or less 98%) better at FSAA than the GeForce 8600 GTS, and also will be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 3690/3830 10688 Mpixels/sec
GeForce 8600 GTS 5400 Mpixels/sec
Difference: 5288 (98%)

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 GTS

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 GTS Radeon HD 3690/3830
Manufacturer nVidia AMD
Year April 2007 2008
Code Name G84 RV670 PRO
Memory 512 MB 256 MB
Core Speed 675 MHz 668 MHz
Memory Speed 2000 MHz 1656 MHz
Power (Max TDP) 75 watts 75 watts
Bandwidth 32000 MB/sec 26496 MB/sec
Texel Rate 10800 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 5400 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 largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 can be applied in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many 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

GeForce 8600 GTS

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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