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pci-express 2.0 vs pci-express 2.1

By Snuffy09 ·
From what i understand pci-express 2.1 cards will work on/in pci-express 2.0 bus slots you will just not achieve 2.1 speeds until pci-e 3.0 comes out... is this correct?

then will 2.1 and 2.0 work in 3.0 slots?

thanks!!!

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3.0 is in the future

by JamesRL In reply to pci-express 2.0 vs pci-ex ...

Today a 2.1 card will work in a 1.0/1.1/2.0/2.1 slot Speedwise, a 2.0 and 2.1 are the same. 2.1 has some of the management functions of 3.0.

James

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Third paragraph down.

by Ron K. In reply to pci-express 2.0 vs pci-ex ...

http://www.dailytech.com/article.aspx?newsid=12069<br>
The article was written 6/12/2008 though, before the specifications were even finalized. It appears that was sometime late last year but I didn't get the memo so I can't say.<br>
If I had to guess I'd say they won't perform up to speed in an older slot. <br>
Good question. I didn't even know that 3.0 was in the works so it's all new to me.

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If I had to guess I'd say they won't perform up to speed in an older slot.

by Snuffy09 In reply to Third paragraph down.

but will 2.1 and 2.0 work in the newer slot 3.0?

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Slot is the limiting factor

by JamesRL In reply to If I had to guess I'd say ...

A 2.0 or 2.1 card in a 1.0 slot will have the same bandwith as any 1.0.

But of course bandwidth isn't the only parameter in a graphics card, a newer card often has a faster processor and RAM, and rarely is the bus speed the bottleneck.

From what I've read the 3.0 slot is supposed to be backwards compatible, but as the design isn't locked down yet, that could change.

James

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yeah well...

by Snuffy09 In reply to Slot is the limiting fact ...

the final call probably wont be backwards compatible which i hate because typically with motherboard architecture you have to replace all your hardware when you want to upgrade your motherboard. you cant reuse any of it.

if you have ddr2 RAM you have to replace it with DDR3

if your have a AM2+ CPU you have to replace it with a AM3 CPU

so now im ready for the if you have a 2.0 pci-e you need to replace it with a 3.0

I'm a "slow budget builder" i could not plop down $700-800 for parts at one time i buy part by part by priority which is why i dislike the constant incompatibilities...

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Depends on your outlook

by JamesRL In reply to yeah well...

The group says otherwise:
http://www.pcisig.com/news_room/faqs/pcie3.0_faq/
They suggest it will be backwards compatible.

If you are buying a MB today, you will have a 2.0 or 2.1, and you will be able to upgrade the video card for many many years to come.

If you are buying a video card today, how long do you expect to keep your MB?

Many of the changes are theoretical improvements. For example, when the AGP/PCI express 1.0 changeover happened, in theory the PCIexpress had a theoretical speed bump since it had twice the bandwidth. But in testing many PCIExpress cards, with the same GPU, were actually slightly slower.

James

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If you are buying a video card today, how long do you expect to keep your

by Snuffy09 In reply to Depends on your outlook

"If you are buying a video card today, how long do you expect to keep your MB?"

MB i would keep a few years, GFX cards are like $200 a year minimum to keep up

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There will always be some bottleneck.

by Ron K. In reply to yeah well...

It'll be one component or another. For me it's almost certain, the day I take delivery of a new state of the art system is the same day they'll announce a breakthrough in (take your pick) technology. I don't even bother trying to keep up anymore. It takes too much effort.

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It takes too much effort.

by Snuffy09 In reply to There will always be some ...

and money!!! don't forget money! lol

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2nd that notion!

by ---TK--- In reply to There will always be some ...

I figured it out a couple years ago that, regardless of what you have it will be out dated the next day. So, to me there is no reason to keep up with the Jones.

Now if there was no budget, that would be a different story... :)

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