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GeForce 8600 GT 1GB GDDR3 vs Radeon HD 3650 256MB

Intro

The GeForce 8600 GT 1GB GDDR3 has a core clock frequency of 540 MHz and a GDDR3 memory speed of 700 MHz. It also makes use of a 128-bit memory bus, and makes use of a 80 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare all of that to the Radeon HD 3650 256MB, which comes with GPU clock speed of 725 MHz, and 256 MB of DDR2 RAM set to run at 800 MHz through a 128-bit bus. It also is comprised of 120(24x5) Stream Processors, 8 TAUs, and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 1GB GDDR3 47 Watts
Radeon HD 3650 256MB 78 Watts
Difference: 31 Watts (66%)

Memory Bandwidth

In theory, the Radeon HD 3650 256MB should perform just a bit faster than the GeForce 8600 GT 1GB GDDR3 in general. (explain)

Radeon HD 3650 256MB 25600 MB/sec
GeForce 8600 GT 1GB GDDR3 22400 MB/sec
Difference: 3200 (14%)

Texel Rate

The GeForce 8600 GT 1GB GDDR3 is quite a bit (more or less 49%) better at texture filtering than the Radeon HD 3650 256MB. (explain)

GeForce 8600 GT 1GB GDDR3 8640 Mtexels/sec
Radeon HD 3650 256MB 5800 Mtexels/sec
Difference: 2840 (49%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 8600 GT 1GB GDDR3 is a better choice, by far. (explain)

GeForce 8600 GT 1GB GDDR3 4320 Mpixels/sec
Radeon HD 3650 256MB 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 1GB GDDR3

Amazon.com

Check prices at:

Radeon HD 3650 256MB

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 1GB GDDR3 Radeon HD 3650 256MB
Manufacturer nVidia AMD
Year April 2007 2008
Code Name G84 RV635 PRO
Memory 1024 MB 256 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 DDR2
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 maximum amount of information (in units of MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 1GB GDDR3

Amazon.com

Check prices at:

Radeon HD 3650 256MB

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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