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How to tell how many PCI-E lanes?

I had to put my graphics card into the second slot in my Asus P7P55D Deluxe. The fanless cooler conflicts with my CPU cooler when it's in the first slot.

Is there a way to tell how many lanes are actually available to it in that slot? The manual doesn't mention what happens with a single card in any slot other than the first.

The card is a Sapphire Radeon HD 3650 512MB DDR2. Okay, it's not the fastest and it probably can't max out 8 lanes, but it's silent.
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  1. Best answer
    You can download free software called GPU-z, it will tell you how many lanes are available at bus interface section.
  2. If that's PCI-e 2.0, I doubt that the 3650 would even max out 4 lanes.

    Anyways, make sure you enable the little test in GPU-z that gets your graphics card working so that it reports the lane speed correctly.
  3. GPU-Z it is. BigMack70, you are probably right. Since I don't do any 3D gamingg, I can afford to use a low-power no-fan part.
  4. Best answer selected by WyomingKnott.
  5. This topic has been closed by Mousemonkey
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