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

Intro

The GeForce 8600 GT 512MB GDDR3 makes use of a 80 nm design. nVidia has clocked the core frequency at 540 MHz. The GDDR3 memory works at a speed of 700 MHz on this particular card. It features 32 SPUs as well as 16 TAUs and 8 ROPs.

Compare those specs to the Radeon HD 3650 512MB, which features GPU clock speed of 725 MHz, and 512 MB of GDDR3 memory running at 800 MHz through a 128-bit bus. It also is comprised of 120(24x5) SPUs, 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 just a bit superior to the GeForce 8600 GT 512MB GDDR3 in general. (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 should be quite a bit (approximately 49%) more effective at texture 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

The GeForce 8600 GT 512MB GDDR3 should be a lot (approximately 49%) more effective at anti-aliasing than the Radeon HD 3650 512MB, and able to handle higher screen resolutions better. (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 maximum amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the 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 that the graphics chip can possibly record to the local memory in a 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 - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach 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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