trparky
Bite My Shiny Metal Ass
Premium,MVM
join:2000-05-24
Cleveland, OH
clubs:
 ·AT&T U-Verse
1 edit | PCI Express 16x vs. PCI Express 16x 2.0
So I'm looking at video cards now and noticed that Newegg doesn't have many of video cards that are PCI Express 16x but they have way more in the PCI Express 16x 2.0 category.
So what is PCI Express 16x 2.0? What is the difference between that and the old PCI Express 16x standard? What about all of us poor SOBs that have motherboards that only have PCI Express 16x slots? What do we do?
God, I can't believe how fast this stuff changes. Don't read anything new or pay attention to the trends for six months and you can quickly fall behind.
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Tom |
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beerbum
Premium
join:2000-05-06
Reading, PA
clubs: | »www.google.com/#hl=en&source=hp&···1cee2c5b
your welcome. |
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trparky
Bite My Shiny Metal Ass
Premium,MVM
join:2000-05-24
Cleveland, OH
clubs: | By the way, I have this motherboard.
»www.newegg.com/Product/Product.a···13131222
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Tom |
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beerbum
Premium
join:2000-05-06
Reading, PA
clubs:
| pretty much what makes PCIe 2.0 stand out from 1.0 and 1.1 is that the bandwidth available for a 2.0 device has doubled that which 1.0 has.
a 1 lane PCIe version 1.0 card has a capacity of 250 MB/sec
a 1 lane PCIe version 2.0 card has a capacity of 500 MB/sec
when PCIe v 3.0 comes out, a 1 lane card will do 1 GB/sec
a 1 lane card is the one with the very small PCIe connector, and a 16 lane card naturally is the card with the longest connector.
a 16x version 1.0 card can do 1 GB/sec
a 16x version 2.0 card can do 8 GB/sec
a 16x version 3.0 card will do 16 GB/sec |
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asdfdfdfdfdf
@Level3.net
| reply to trparky
"What about all of us poor SOBs that have motherboards that only have PCI Express 16x slots?"
You don't need to worry about this.
There is no problem running a 2.0 card in a v1.0 slot. In fact there is no performance loss for single cards either.
If there is an upgrade you are contemplating give us more detail about what you are trying to accomplish. |
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Bandito
join:2003-01-23
 ·Shaw
| said by asdfdfdfdfdf :
"What about all of us poor SOBs that have motherboards that only have PCI Express 16x slots?"
You don't need to worry about this.
There is no problem running a 2.0 card in a v1.0 slot. In fact there is no performance loss for single cards either.
If there is an upgrade you are contemplating give us more detail about what you are trying to accomplish.
I was wondering about this the other day too since I havent kept track on the PCIe phenomenon.
Just wondering how there would not be a performance issue if you're running a 16x 2.0 card in a 1.0 slot or if you're running a 16 x 3.0 in a 2.0 slot? And what about this x16, x8, x4 that are shown in the specs of various mobo manufacturers? |
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asdfdfdfdfdf
@Level3.net
| reply to trparky
"Just wondering how there would not be a performance issue if you're running a 16x 2.0 card in a 1.0 slot"
Because present cards aren't saturating the bus yet. In fact very few present cards, except possibly the highest end cards, are even much limited by x8 rather than x16 v1.0. The x16, x8 x4 is the number of lanes. Each lane is capable of about 250MB/s. with v 1.0 |
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asdfdfdfdfdf
@Level3.net
| reply to trparky
To put it another way the interface is like the highway, which can handle a certain amount of traffic. Is running on a 4 lane highway a hindrance relative to an 8 lane highway? Only if there are so many cars that the highway becomes a bottleneck. If you are the only car on the highway it doesn't matter whether there are 4 lanes or 100 lanes.
So you might ask why add more lanes or higher bandwidth lanes? So the capacity is there when newer generation graphics cards need it. At the present time the pci-express version doesn't matter because the v 1.0 bus is capable of handling the traffic. |
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Bandito
join:2003-01-23
·Shaw
| Good analogy. Is 1.0x the fastest "lane" right now? I see these cards that have 16x etc and I also noticed that the Asus USB 3x, Sata 6x add-on card is using 4x. When choosing a mobo, I want one that can handle the traffic for at least 3 or more years. |
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asdfdfdfdfdf
@level3.net
| reply to trparky
version 2.0 is the fastest lane right now. Twice the bandwidth of version 1.0.
x16 or 16 lane cards are typical for graphics cards. If you have concerns when you are ready to buy we can look at the specific motherboard product you are considering.
If you are waiting for motherboards with usb 3 and 6 G/bit sata then it isn't likely you are going to need to worry about this. The boards will have the latest spec pci-express slots. |
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