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GeForce 8600 GT 512MB DDR2 vs Radeon HD 4850 1GB

Intro

The GeForce 8600 GT 512MB DDR2 features core speeds of 540 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 RAM. It features 32 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

Compare all of that to the Radeon HD 4850 1GB, which uses a 55 nm design. AMD has clocked the core speed at 625 MHz. The GDDR4 RAM is set to run at a frequency of 993 MHz on this card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2 47 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 63 Watts (134%)

Memory Bandwidth

Theoretically, the Radeon HD 4850 1GB should perform much faster than the GeForce 8600 GT 512MB DDR2 overall. (explain)

Radeon HD 4850 1GB 63552 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 50752 (397%)

Texel Rate

The Radeon HD 4850 1GB should be a lot (about 189%) better at AF than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 4850 1GB 25000 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 16360 (189%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4850 1GB is the winner, by far. (explain)

Radeon HD 4850 1GB 10000 Mpixels/sec
GeForce 8600 GT 512MB DDR2 4320 Mpixels/sec
Difference: 5680 (131%)

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 DDR2

Amazon.com

Check prices at:

Radeon HD 4850 1GB

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 DDR2 Radeon HD 4850 1GB
Manufacturer nVidia AMD
Year April 2007 Jun 25, 2008
Code Name G84 RV770 PRO
Memory 512 MB 1024 MB
Core Speed 540 MHz 625 MHz
Memory Speed 800 MHz 1986 MHz
Power (Max TDP) 47 watts 110 watts
Bandwidth 12800 MB/sec 63552 MB/sec
Texel Rate 8640 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 32 800(160x5)
Texture Mapping Units 16 40
Render Output Units 8 16
Bus Type DDR2 GDDR4
Bus Width 128-bit 256-bit
Fab Process 80 nm 55 nm
Transistors 289 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB DDR2

Amazon.com

Check prices at:

Radeon HD 4850 1GB

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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