MSI P35 Neo2-FR and GeForce 8800GT?

Question

Hello,
I am interested in buying MSI P35 Neo2-FR motherboard, and also the latest GeForce 8800GT. But after doing some research I notice that many people have having problems installing their 8800GT card into motherboards with a PCI-E 1.0a slots, and the Neo2-FR has 1.0a slots! However there seem to be exceptions, some motherboards with 1.0a slots work with 8800GT!
This is all very confusing 
Can anyone verify that MSI P35 Neo2-FR motherboard and GeForce 8800GT (With PCI-E 2.0!) works in the 1.0a slot??
Thank you.

Answer 1

According to many sources, both personal and documentary, PCI-e 2.0 cards will work in PCI-e 1.X slots(Wikipedia is not exactly what I would consider a super source). Here's a more official source, PCI-SIG.
http://www.pcisig.com/news_room/faqs/pcie2.0_faq/
Quote from: PCI-SIG
Q4: It sounds as if both speed grades are supported in the PCIe 2.0 specification?
A4: The PCIe Base 2.0 specification supports both 2.5GT/s and 5GT/s signaling rates, in order to retain backward compatibility with existing PCIe 1.0 and 1.1 systems. Aside from the faster bit rate, there are a number of improvements in this new specification that allow greater flexibility and reliability in designing PCIe links. For example, the interconnect can be dynamically managed for platform power and performance considerations through software controls. Another significant RAS feature is the inclusion of new controls to allow a PCIe link to continue to function even when some lanes become non-operational.
Q5: Then PCIe 2.0 must be backward compatible with PCIe 1.1 and 1.0?
A5: Yes. The PCIe Base 2.0 specification supports both the 2.5GT/s and 5GT/s signaling technologies. A device designed to the PCIe Base 2.0 specification may support 2.5GT/s, 5GT/s or both. However, a device designed to operate specifically at 5GT/s must also support 2.5GT/s signaling. The PCIe Base specification covers chip-to-chip topologies on the system board. For I/O extensibility across PCIe connectors, the Card Electromechanical (CEM) and ExpressModule™ specifications will also need to be updated, but this work will not impact mechanical compatibility of the slots, cards or modules. Currently, the PCI-SIG is defining the PCIe CEM 2.0 specification which has been released to members for review at v0.5. There are currently no plans to adapt the PCIe Mini CEM specification for the faster bit rate as the market need has not yet materialized.
Quote from: >>About PCI-SIG<<
Formed in 1992, PCI-SIG (originally formed as the Peripheral Component Interconnect Special Interest Group) is the industry organization chartered with the development and management of the PCI bus specification, the industry standard for a high-performance I/O interconnect to transfer data between a CPU and its peripherals. As part of that charter, the organization aims to do the following:
Support new requirements
Preserve backward compatibility for all PCI revisions
Maintain the specification as an easy-to-implement, stable technology
Contribute to the technical longevity of PCI
Support the establishment of PCI as an industry-wide standard