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GeForce 8600 GTS vs Radeon HD 3650 512MB

Intro

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

Compare all of that to the Radeon HD 3650 512MB, which has clock speeds of 725 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 120(24x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GTS 75 Watts
Radeon HD 3650 512MB 78 Watts
Difference: 3 Watts (4%)

Memory Bandwidth

Theoretically speaking, the GeForce 8600 GTS will be 25% quicker than the Radeon HD 3650 512MB in general, because of its greater data rate. (explain)

GeForce 8600 GTS 32000 MB/sec
Radeon HD 3650 512MB 25600 MB/sec
Difference: 6400 (25%)

Texel Rate

The GeForce 8600 GTS will be much (approximately 86%) faster with regards to texture filtering than the Radeon HD 3650 512MB. (explain)

GeForce 8600 GTS 10800 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 5000 (86%)

Pixel Rate

The GeForce 8600 GTS will be quite a bit (more or less 86%) more effective at full screen anti-aliasing than the Radeon HD 3650 512MB, and also will be capable of handling higher resolutions more effectively. (explain)

GeForce 8600 GTS 5400 Mpixels/sec
Radeon HD 3650 512MB 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 512MB

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 512MB
Manufacturer nVidia AMD
Year April 2007 2008
Code Name G84 RV635 PRO
Memory 512 MB 512 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 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/AGP 8x
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount 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 clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 8600 GTS

Amazon.com

Check prices at:

Radeon HD 3650 512MB

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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