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GeForce 8600 GT 1GB GDDR3 vs Radeon HD 7850

Intro

The GeForce 8600 GT 1GB GDDR3 features a GPU clock speed of 540 MHz, and the 1024 MB of GDDR3 memory is set to run at 700 MHz through a 128-bit bus. It also is made up of 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare all that to the Radeon HD 7850, which has a core clock speed of 860 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It features 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 1GB GDDR3 47 Watts
Radeon HD 7850 130 Watts
Difference: 83 Watts (177%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7850 should theoretically be much better than the GeForce 8600 GT 1GB GDDR3 in general. (explain)

Radeon HD 7850 153600 MB/sec
GeForce 8600 GT 1GB GDDR3 22400 MB/sec
Difference: 131200 (586%)

Texel Rate

The Radeon HD 7850 should be a lot (about 537%) faster with regards to AF than the GeForce 8600 GT 1GB GDDR3. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce 8600 GT 1GB GDDR3 8640 Mtexels/sec
Difference: 46400 (537%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7850 is a better choice, by a large margin. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce 8600 GT 1GB GDDR3 4320 Mpixels/sec
Difference: 23200 (537%)

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 7850

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 7850
Manufacturer nVidia AMD
Year April 2007 March 2012
Code Name G84 Pitcairn Pro
Memory 1024 MB 2048 MB
Core Speed 540 MHz 860 MHz
Memory Speed 1400 MHz 4800 MHz
Power (Max TDP) 47 watts 130 watts
Bandwidth 22400 MB/sec 153600 MB/sec
Texel Rate 8640 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 32 1024
Texture Mapping Units 16 64
Render Output Units 8 32
Bus Type GDDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 80 nm 28 nm
Transistors 289 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to 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 1GB GDDR3

Amazon.com

Check prices at:

Radeon HD 7850

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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