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PCIe 3.0 x16 x8 x4

  • Motherboards
Last response: in Motherboards
April 19, 2014 11:38:55 PM

Couple of questions here....

1.) What does the x16, x8, x4 stand for?

2.) How come when I look for a motherboard that has 3.0 on newegg it says in the specs 2.0 and has USB 3.0 when I was obviously looking for PCIe 3.0?

3.) Is there a night and day difference between 2.0 an 3.0 or is 2.0 still going to be around for another 5 or so years?


More about : pcie x16

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a c 388 V Motherboard
April 19, 2014 11:45:12 PM

x16 is the full bandwidth, 8 is half, which can still handle most SLI/Xfire configs, and x4 is pretty much useless for multi card configs.

I typed 'Newegg PCIe 3.0 and got this list So it seems to be working fine.

There is currently no card that can fill the 2.0 slots bandwidth, so it will be around until then and a bit past. Hard to give a timeline though.
April 19, 2014 11:59:32 PM

So for example....

EVGA GTX 750ti SC is 3.0 compatible but still doesn't consume all of a 2.0 bandwidth?

And when it comes to the badwidth this card in question shouldn't really require an x16 slot? So like really high-end cards are the only ones that would only require x16? I'm a little confused on why there are even different bandwidths. Doesn't make since too me.

Reason for asking is I'm wanting to begin a build an I'm looking for a motherboard that has all the bells and whistles but at the same time I want to know what I paying for so I know I'm not overpaying for stuff I won't need except for rare occasions. I know there are a lot of extras out there that are just a money grab for the unwary buyer. Like the fact of GPU's having more memory makes them faster when in fact it only affects the amount it can render at a time and not how fast it is processed.
a c 388 V Motherboard
April 20, 2014 10:26:47 AM

Yeah the 750 would work fine, and so do larger cards.

As for the board, aim for the X16 slots, as they are nice to have, but really only the first 2 slots have to be x16, the other two are used for tri/quad sli.