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PCIe 2.0 on a PCIe x16 mobo

by Mark273978 / January 23, 2008 6:45 PM PST

I was wondering if a PCIe 2.0 video card would work in a PCIe x16 slot? If so is there performance lost?

thank you,

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Yes. Take a look here:
by lacsr / January 23, 2008 8:19 PM PST
It seems that if it was designed to use 2.0 specs, it would preform at the slots specs instead, go figure. Why would you expect anything else? Just like USB1.1 and USB 2.0. You cannot force the slot to act like a 2.0 slot if it is not designed for that.
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by Mark273978 / January 24, 2008 4:34 AM PST
In reply to: Yes. Take a look here:

I was thinking it would be capable because, if its able to run at a maximum of 2.0 why not at 16x. If they changed the speed limit on a highway from 65 to 200 mph would that mean your car is capable of running 200 mph?

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Maybe a little reading might clear some confusion.
by ahtoi / January 24, 2008 11:28 AM PST
In reply to: 2.0-16x
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The 2.0 refers to the specification not the speed
by lacsr / January 24, 2008 8:24 PM PST

PCI-e x 16 refers to the bus speed compared to the older AGP speed 8x. Read the specs listed in the pages posted above. There is a newer spec listed as 3.0 that will further increase the bus speed, however it is not available yet.
Your comparing to a car speed is applicable only if your car is capable of going 200mph. Most cars are not, so in this cause while the highway will allow 200mph, your Volkswagen bug can only muster 75mph. Understand now?

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2.0 x16
by carmicd26 / August 20, 2010 3:31 AM PDT

yes but a lot of GPU card manufactures are making cards that are backwords compatible so if the card is 2.0 it will work in a 1.0 slot! but what is a good way to find out what your MB has?

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