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GeForce 8600 GTS vs Radeon HD 5570

Intro

The GeForce 8600 GTS has clock speeds of 675 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 memory. It features 32 SPUs along with 16 Texture Address Units and 8 Rasterization Operator Units.

Compare those specs to the Radeon HD 5570, which comes with GPU clock speed of 650 MHz, and 512 MB of DDR3 memory running at 900 MHz through a 128-bit bus. It also features 400(80x5) SPUs, 20 TAUs, and 8 ROPs.

(No game benchmarks for this combination yet.)

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, in theory, should perform a small 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 little bit (about 20%) faster with regards to texture filtering than the GeForce 8600 GTS. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 8600 GTS is the winner, not by a very large margin though. (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

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

Model GeForce 8600 GTS Radeon HD 5570
Manufacturer nVidia AMD
Year April 2007 February 9, 2010
Code Name G84 Redwood PRO
Fab Process 80 nm 40 nm
Bus PCIe x16 PCIe 2.1 x16
Memory 512 MB 512 MB
Core Speed 675 MHz 650 MHz
Shader Speed 1450 MHz (N/A) MHz
Memory Speed 1000 MHz (2000 MHz effective) 900 MHz (1800 MHz effective)
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
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2
Power (Max TDP) 75 watts 43 watts
Shader Model 4.0 5.0
Bandwidth 32000 MB/sec 28800 MB/sec
Texel Rate 10800 Mtexels/sec 13000 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 5200 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, 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 figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 reach the max fill rate.

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