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

Intro

The GeForce 8600 GT 512MB DDR2 has a core clock frequency of 540 MHz and a DDR2 memory frequency of 400 MHz. It also features 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 those specifications to the Radeon HD 4850 1GB, which has core clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR4 memory. It features 800(160x5) SPUs as well as 40 TAUs 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 speaking, the Radeon HD 4850 1GB should be 397% faster than the GeForce 8600 GT 512MB DDR2 overall, due to its greater bandwidth. (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 much (approximately 189%) faster with regards to texture filtering 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 screen resolution is important to you, then the Radeon HD 4850 1GB is superior to the GeForce 8600 GT 512MB DDR2, by a large margin. (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: Bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a 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 figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max 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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