Computer question; PCIe modes. - Help.com

Computer question; PCIe modes.

Please look at the specifications for this motherboard:

http://www.newegg.com/Product/Product...

The PCI-E x16 slots are listed as “1 x PCIe x16, 1 x PCIe x8/x16, 1 x PCIe x8″

What does ‘x8/x16′ mean?

My guess is that between the 3 PCIe slots, the mobo can support a total speed of x32. So if you have two PCIe x16 cards running in SLI/Crossfire, they will both run at a full x16, but if you have 3 such cards, they will be running at x16/x8/x8. So ‘x8/x16′ means that the second slot will run at x8 or x16, depending on the number of cards.

Is that correct? This is just my best attempt to figure it out. An internet search was fruitless.

If I’m right, then why is this motherboard advertised as ‘true 3-way SLI’, if it only runs at x16/x16 or x16/x8/x8? I would expect it to run at x16/x16/x16!

Thanks for any and all help.

Also, if you’d like to review my current build, before I buy, please go to:

http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=9813 566

This closed post was written 6 months, 4 weeks ago | V/U/S: 233, 6, 3 | Edit Post | Report Post

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n0tacr00k 3 #
An Unknown Location | 6 months, 4 weeks ago (15 minutes after post)

three way applies to x16/x8/x8 modes, in this case. max is still x32

three way applies to x16/x8/x8 modes, in this case. max is still x32

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dotspot 1 #
An Undisclosed Location | 6 months, 4 weeks ago (33 minutes after post)

Thanks. So then I was right about what x8/x16 means?

Thanks. So then I was right about what x8/x16 means?

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n0tacr00k 3 #
An Unknown Location | 6 months, 4 weeks ago (39 minutes after post)

yeah, eight or sixteen mode slot.

yeah, eight or sixteen mode slot.

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The Clue 16 #
Minot, ND, US | 6 months, 4 weeks ago (2 hours, 49 minutes after post)

As with any multiple speed slots (like memory) it will run at the lowest setting if configured with three cards and you have a lower speed slot 16X-16X-8X will run at 8X-8X-8X. It will run at 16 using two cards. That is why it says that it is a true 3-way sli. If you want it to run at 16X then you will have to look and find a more expensive board that has the capabilities of doing that. There is one I know of and it only costs 10,000.00. Hope this helps :-)

As with any multiple speed slots (like memory) it will run at the lowest setting if configured with three cards and you have a lower speed slot 16X-16X-8X will run at 8X-8X-8X. It will run at 16 using two cards. That is why it says that it is a true 3-way sli. If you want it to run at 16X then you will have to look and find a more expensive board that has the capabilities of doing that. There is one I know of and it only costs 10,000.00. Hope this helps :-)

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dotspot 1 #
An Undisclosed Location | 6 months, 1 week ago (3 weeks after post)

I bought the motherboard. It does indeed mean either x16/x16 with two cards or x16/x8/x8 with three. Good enough for me, three ATI HD 4780 is kind of excessive anyway. Closing post, thanks for help.

I bought the motherboard. It does indeed mean either x16/x16 with two cards or x16/x8/x8 with three. Good enough for me, three ATI HD 4780 is kind of excessive anyway. Closing post, thanks for help.

Help me with: If my girlfriend doesn’t call me, should I call her, or wait until she calls?

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