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GeForce 8600 GTS vs Radeon HD 3650

Intro

The GeForce 8600 GTS has a GPU clock speed of 675 MHz, and the 512 MB of GDDR3 memory is set to run at 1000 MHz through a 128-bit bus. It also features 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare all of that to the Radeon HD 3650, which features a GPU core clock speed of 725 MHz, and 1024 MB of GDDR4 memory set to run at 800 MHz through a 128-bit bus. It also is comprised of 120(24x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GTS 75 Watts
Radeon HD 3650 78 Watts
Difference: 3 Watts (4%)

Memory Bandwidth

The GeForce 8600 GTS, in theory, should perform much faster than the Radeon HD 3650 overall. (explain)

GeForce 8600 GTS 32000 MB/sec
Radeon HD 3650 25600 MB/sec
Difference: 6400 (25%)

Texel Rate

The GeForce 8600 GTS will be a lot (approximately 86%) faster with regards to texture filtering than the Radeon HD 3650. (explain)

GeForce 8600 GTS 10800 Mtexels/sec
Radeon HD 3650 5800 Mtexels/sec
Difference: 5000 (86%)

Pixel Rate

The GeForce 8600 GTS is much (about 86%) faster with regards to full screen anti-aliasing than the Radeon HD 3650, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce 8600 GTS 5400 Mpixels/sec
Radeon HD 3650 2900 Mpixels/sec
Difference: 2500 (86%)

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 3650

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 3650
Manufacturer nVidia AMD
Year April 2007 2008
Code Name G84 RV635 PRO
Memory 512 MB 1024 MB
Core Speed 675 MHz 725 MHz
Memory Speed 2000 MHz 1600 MHz
Power (Max TDP) 75 watts 78 watts
Bandwidth 32000 MB/sec 25600 MB/sec
Texel Rate 10800 Mtexels/sec 5800 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 2900 Mpixels/sec
Unified Shaders 32 120(24x5)
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type GDDR3 GDDR4
Bus Width 128-bit 128-bit
Fab Process 80 nm 55 nm
Transistors 289 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16/AGP 8x
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 MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the 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 most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. 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 fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 8600 GTS

Amazon.com

Check prices at:

Radeon HD 3650

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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