Computer Hardware

Computer Hardware
All discussions relating to computer hardware

YES PCIe 1.0-1.1-1.1a-2.0-2.1-3.0 ARE Compatible!!

  • LoL
  • wow, was i confused or what?  linking to the same freakin post that i was on!  Doh!!
  • Doh, I figured this is a topic that has had to have been posted before. If it's any consolation for my noobishness I did try several different search terms in the A+ Hardware Support forum and didn't find an answer to my question. Guess I should've searched the Computer Building & Upgrade >> Video forum instead. Thanks again.
  • mrtraver:
    wow, was i confused or what?  linking to the same freakin post that i was on!  Doh!!

    You were probably replying to his post as I joined it to this thread ROFL

  • I am hoping to avoid making a new thread about this, since it is closely related.

    Can we use a PCI Express 2.1 card in a 2.0 slot?

    This wikipedia article is not too clear about that.

    http://en.wikipedia.org/wiki/Pci_express#PCI_Express_2.1

    And just in case anyone reading this has not heard of the 2.1 cards I will link one from our favorite storefront, Newegg.

    (Actually I will link the entire category of them.)

    http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=2010380048%201069653938&name=PCI%20Express%202.1%20x16

  • PCIE 2.1 is backwards compatible with PCIE 2.0 and PCIE 1.0/1.1

    Yes its the same speed as PCIE 2.0, it just has some management features that will be implemented in PCIE 3.0.

    So it's pretty much a PCIE 3.0 slot without the speed capability.

  • That is if you can get your motherboard manufacture to give you a Bios to fix a compatibility issue with a motherboard that has a 1.0a PCI-E slot.
  • didn't know that 2.1 worked with 1.0 and vice versa, thanks for the info man!
  • Ok I have read that they are backwards compatible and vice versa but I have a more detailed question around performance.  My motherboard is a PCI-Express X16 Mobo and I currently have a GeForce 6600GT in my system.  

    http://www.newegg.com/Product/Product.aspx?Item=N82E16814143026 

    Card has 128MB of GDDR3 memory, core clock of 525Mhz and Memory clock of 1050Mhz.  I also have 2GB of DDR400 memory.  I am looking to upgrade my system without replacing the Mobo/Processor/Ram to get higher performance out of some current games (WoW) and put myself in a better position for the expansion coming out in December.  

    With that said, I am looking to drop in 2 more GB of the exact same ram (bringing me to 4GB total) and was looking at a Radeon HD 5570 1GB of DDR3 with a core clock of 650Mhz and Memory Clock of 1600Mhz.

    http://www.newegg.com/Product/Product.aspx?Item=N82E16814141118 

    My question mainly is, with a PCI-Express X16 mobo and my current video card, would I see enough improvement to justify the $75 price with the Radeon PCI-Express 2.0 card since technically the card will be scaled down to PCI-Express 1.1 standards or should I just upgrade my Ram and stick with my current video card until I decide upgrade my whole system in a year or so?

     Thanks everyone! 

  • So what are the limits between pcie 2.0 2.1 - pcie 16x?  In otherwords, at what point does pcie 16x reach where no matter how significant the card improvement is, pcie 16x can't utilize it any more?

     

    GmsCool:

    YES PCIe 2.0  and 1.1 (16x) are compatible!

    2.0 cards will work in 1.1 main boards and visa versa.  (most of the time) 

    http://en.wikipedia.org/wiki/PCI_Express#PCI_Express_2.0

    Also the 2.1 cards are compatible with both older versions as well.

    Any questions? 

     

    Edit: Post updated for 2.1

  • There is no speed difference between 2.0 and 2.1, 2.1 implements some data reporting features that are planned for PCIE 3.0. (This is for future 2.1/3.0 compatibility).