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Old 06-23-08   #1 (permalink)
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Default PCIe x16 and 2.0
I have a this mobo http://www.newegg.com/Product/Produc...82E16813131172

and I want to know if a PCIe x16 2.0 card will work with it? So the basic question is a 2.0 card backwards capatiable with the orginal mobo's?
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Old 06-23-08   #2 (permalink)
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Yes PCI-E 2.0 is backwards compatible.
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Old 06-23-08   #3 (permalink)
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Thanks... Do you happen to know what the prefromance difference is? Or what changed in the 2.0 compared to the older ones?
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Old 06-23-08   #4 (permalink)
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http://xtreview.com/addcomment-id-35...nce-boost.html

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The first chipset with PCI express 2.0 support already appeared in sale. Video card with PCI express 2.0 interface on base of g92 chips and RV670 will be available soon . Certainly, many already ask this question : will the passage to this interface give a noticeable speed increase ?

Associates have their opinion, formed on base of the seen demonstration system with PCI express 2.0 support . First , all video card series radeon HD 2600 and Radeon HD 2400 on base of RV630 and RV610 chips originally support PCI express 2.0. Associates assert that they saw a working system with PCI express 2.0 support , where the video card series radeon HD 2600/2400 showed a speed increase in separate tests, which intensively load the system bus - for example 3DMark'06.

Average speed increase compose 10%. In crossFire regime the increase will be higher . Video card with support to the functions hyperMemory and TurboCache Will also win from the passage on PCI express 2.0 .

During January 2008 , AMD will release the RV635 and RV620 chips , which will propose official support to PCI express 2.0 and DirectX 10.1, and also they will use a more contemporary 55 nm technical process. Perhaps, video card on base of these chips are better suitable for systems with PCI express 2.0 support .
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Old 06-23-08   #5 (permalink)
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Some useful info here...

http://www.pcisig.com/news_room/faqs/pcie2.0_faq/
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Old 06-23-08   #6 (permalink)
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Usefull info... Thank you both!
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Old 06-23-08   #7 (permalink)
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pcie2 is still way more bandwidth than we need, yet.

anybody found any bench results that show 2 gives more than 1?
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Old 07-01-08   #8 (permalink)
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I said this in another thread and ill say it again

PCIe 2.0 doubles the bus standard's bandwidth from 2.5 Gbit/s to 5 Gbit/s, meaning a x32 connector can transfer data at up to 16 GB/s in each direction.

PCIe 2.0 is completely backwards compatible with PCIe v1.x. Graphic cards and motherboards designed for v2.0 will be able to work with v1.1 and v1.0, and vice versa.

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Old 07-01-08   #9 (permalink)
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Quote:
Originally Posted by marsey99 View Post
pcie2 is still way more bandwidth than we need, yet.

anybody found any bench results that show 2 gives more than 1?
There was a recent benchmark between the P45 and X38/48 motherboards. There was up to 15% performance differences during CrossFire. While this doesn't make that much of an impact, when you only have a few FPS at high resolutions, there will be a noticeable difference between the two slot types.
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