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GeForce 8600 GT 512MB GDDR3 vs Radeon HD 3650 512MB

Intro

The GeForce 8600 GT 512MB GDDR3 features a core clock frequency of 540 MHz and a GDDR3 memory frequency of 700 MHz. It also uses a 128-bit bus, and uses a 80 nm design. It is made up of 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare all of that to the Radeon HD 3650 512MB, which uses a 55 nm design. AMD has set the core speed at 725 MHz. The GDDR3 memory runs at a frequency of 800 MHz on this specific model. It features 120(24x5) SPUs along with 8 TAUs and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB GDDR3 47 Watts
Radeon HD 3650 512MB 78 Watts
Difference: 31 Watts (66%)

Memory Bandwidth

As far as performance goes, the Radeon HD 3650 512MB should in theory be a bit superior to the GeForce 8600 GT 512MB GDDR3 overall. (explain)

Radeon HD 3650 512MB 25600 MB/sec
GeForce 8600 GT 512MB GDDR3 22400 MB/sec
Difference: 3200 (14%)

Texel Rate

The GeForce 8600 GT 512MB GDDR3 will be much (approximately 49%) more effective at anisotropic filtering than the Radeon HD 3650 512MB. (explain)

GeForce 8600 GT 512MB GDDR3 8640 Mtexels/sec
Radeon HD 3650 512MB 5800 Mtexels/sec
Difference: 2840 (49%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 8600 GT 512MB GDDR3 is superior to the Radeon HD 3650 512MB, by far. (explain)

GeForce 8600 GT 512MB GDDR3 4320 Mpixels/sec
Radeon HD 3650 512MB 2900 Mpixels/sec
Difference: 1420 (49%)

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 512MB GDDR3

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 GT 512MB GDDR3 Radeon HD 3650 512MB
Manufacturer nVidia AMD
Year April 2007 2008
Code Name G84 RV635 PRO
Memory 512 MB 512 MB
Core Speed 540 MHz 725 MHz
Memory Speed 1400 MHz 1600 MHz
Power (Max TDP) 47 watts 78 watts
Bandwidth 22400 MB/sec 25600 MB/sec
Texel Rate 8640 Mtexels/sec 5800 Mtexels/sec
Pixel Rate 4320 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 largest amount of data (in units of megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount 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 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 number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB GDDR3

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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