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GeForce 8600 GTS vs Radeon HD 5570

Intro

The GeForce 8600 GTS features a core clock frequency of 675 MHz and a GDDR3 memory speed of 1000 MHz. It also makes use of a 128-bit bus, and makes use of a 80 nm design. It features 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare those specifications to the Radeon HD 5570, which uses a 40 nm design. AMD has clocked the core frequency at 650 MHz. The DDR3 memory is set to run at a speed of 900 MHz on this particular model. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570 43 Watts
GeForce 8600 GTS 75 Watts
Difference: 32 Watts (74%)

Memory Bandwidth

The GeForce 8600 GTS should theoretically perform a bit faster than the Radeon HD 5570 overall. (explain)

GeForce 8600 GTS 32000 MB/sec
Radeon HD 5570 28800 MB/sec
Difference: 3200 (11%)

Texel Rate

The Radeon HD 5570 is a small bit (approximately 20%) faster with regards to AF than the GeForce 8600 GTS. (explain)

Radeon HD 5570 13000 Mtexels/sec
GeForce 8600 GTS 10800 Mtexels/sec
Difference: 2200 (20%)

Pixel Rate

The GeForce 8600 GTS should be a small bit (approximately 4%) better at full screen anti-aliasing than the Radeon HD 5570, and also capable of handling higher resolutions better. (explain)

GeForce 8600 GTS 5400 Mpixels/sec
Radeon HD 5570 5200 Mpixels/sec
Difference: 200 (4%)

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

Radeon HD 5570

Amazon.com

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 5570
Manufacturer nVidia AMD
Year April 2007 February 9, 2010
Code Name G84 Redwood PRO
Memory 512 MB 512 MB
Core Speed 675 MHz 650 MHz
Memory Speed 2000 MHz 1800 MHz
Power (Max TDP) 75 watts 43 watts
Bandwidth 32000 MB/sec 28800 MB/sec
Texel Rate 10800 Mtexels/sec 13000 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 5200 Mpixels/sec
Unified Shaders 32 400(80x5)
Texture Mapping Units 16 20
Render Output Units 8 8
Bus Type GDDR3 DDR3
Bus Width 128-bit 128-bit
Fab Process 80 nm 40 nm
Transistors 289 million 627 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher 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 amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. 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 quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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