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GeForce 8600 GTS vs Radeon HD 4670 1GB

Intro

The GeForce 8600 GTS comes with a GPU core clock speed of 675 MHz, and the 512 MB of GDDR3 RAM runs at 1000 MHz through a 128-bit bus. It also features 32 Stream Processors, 16 TAUs, and 8 ROPs.

Compare all of that to the Radeon HD 4670 1GB, which has a GPU core clock speed of 750 MHz, and 1024 MB of GDDR4/GDDR3/DDR3/DDR2 RAM running at 1100 MHz through a 128-bit bus. It also is made up of 320(64x5) Stream Processors, 32 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB 70 Watts
GeForce 8600 GTS 75 Watts
Difference: 5 Watts (7%)

Memory Bandwidth

In theory, the Radeon HD 4670 1GB should be 10% faster than the GeForce 8600 GTS overall, due to its greater data rate. (explain)

Radeon HD 4670 1GB 35200 MB/sec
GeForce 8600 GTS 32000 MB/sec
Difference: 3200 (10%)

Texel Rate

The Radeon HD 4670 1GB is much (approximately 122%) faster with regards to texture filtering than the GeForce 8600 GTS. (explain)

Radeon HD 4670 1GB 24000 Mtexels/sec
GeForce 8600 GTS 10800 Mtexels/sec
Difference: 13200 (122%)

Pixel Rate

The Radeon HD 4670 1GB will be just a bit (about 11%) faster with regards to AA than the GeForce 8600 GTS, and also capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4670 1GB 6000 Mpixels/sec
GeForce 8600 GTS 5400 Mpixels/sec
Difference: 600 (11%)

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 GTS

Amazon.com

Check prices at:

Radeon HD 4670 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 GTS Radeon HD 4670 1GB
Manufacturer nVidia AMD
Year April 2007 Sep 10, 2008
Code Name G84 RV730 XT
Memory 512 MB 1024 MB
Core Speed 675 MHz 750 MHz
Memory Speed 2000 MHz 2200 MHz
Power (Max TDP) 75 watts 70 watts
Bandwidth 32000 MB/sec 35200 MB/sec
Texel Rate 10800 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 32 320(64x5)
Texture Mapping Units 16 32
Render Output Units 8 8
Bus Type GDDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 128-bit 128-bit
Fab Process 80 nm 55 nm
Transistors 289 million 514 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 data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at 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 that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce 8600 GTS

Amazon.com

Check prices at:

Radeon HD 4670 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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