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GeForce 8600 GTS vs Radeon HD 5570

Intro

The GeForce 8600 GTS has a clock frequency of 675 MHz and a GDDR3 memory frequency of 1000 MHz. It also features a 128-bit bus, and uses a 80 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare all of that to the Radeon HD 5570, which has clock speeds of 650 MHz on the GPU, and 900 MHz on the 512 MB of DDR3 memory. It features 400(80x5) SPUs as well as 20 Texture Address Units 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

In theory, the GeForce 8600 GTS should be 11% quicker than the Radeon HD 5570 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon HD 5570 will be a small bit (about 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 bit (approximately 4%) more effective at AA than the Radeon HD 5570, and also should be capable of handling higher resolutions without slowing down too much. (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 max amount of data (in units of MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high 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 of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

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