Help! Can't boot with any graphics card but a 7800GT!

[beedubaya]

Got a new PSU...about to try it out *fingers crossed*

 

[patonb]

And??

 

[beedubaya]

Well a new PSU (650w) didn't work. My only conclusion it is my motherboard just doesn't like PCIe 2.0 cards. It worked with the 8800gt for a while but whatever circuit enabled backwards compatibility has went bad. The 7800GT is a PCIe 1.0 card which is why it works flawlessly. I guess ill be building a new rig sooner rather than later.

 

[C0RR0SIVE]

The part that enables backwards compatibility is the card it self...

 

[beedubaya]

Well I have done a little research and have found out PCIe 2.0 is actually fully backwards compatible with PCIe 1.1 but NOT PCIe 1.0 which is what my board has. There have been cases of people with 1.0 boards like mine running 2.0 cards for a period but they eventually become undetectable. I really should have never run an 8800gt on this board in the first place. That would explain why my 8800gt and my gts250 do not respond.

 

[C0RR0SIVE]

That, is odd.... My motherboard is 1.0, and supports my 3850 just fine... Has been for a really long time now to...

PCI Express 2.0

PCI-SIG announced the availability of the PCI Express Base 2.0 specification on 15 January 2007.[9] The PCIe 2.0 standard doubles the per-lane throughput from the PCIe 1.0 standard's 250 MB/s to 500 MB/s. This means a 32-lane PCI connector (x32) can support throughput up to 16 GB/s aggregate. The PCIe 2.0 standard uses a base clock speed of 5.0 GHz, while the first version operates at 2.5 GHz.

PCIe 2.0 motherboard slots are fully backward compatible with PCIe v1.x cards. PCIe 2.0 cards are also generally backward compatible with PCIe 1.x motherboards, using the available bandwidth of PCI Express 1.1. Overall, graphic cards or motherboards designed for v 2.0 will be able to work with the other being v 1.1 or v 1.0.

The PCI-SIG also said that PCIe 2.0 features improvements to the point-to-point data transfer protocol and its software architecture.[10]

In June 2007 Intel released the specification of the Intel P35 chipset which supports only PCIe 1.1, not PCIe 2.0.[11] Some people may be confused by the P35 block diagram which states the Intel P35 has a PCIe x16 graphics link (8 GB/s) and 6 PCIe x1 links (500 MB/s each).[12] For simple verification one can view the P965 block diagram which shows the same number of lanes and bandwidth but was released before PCIe 2.0 was finalized.[original research?] Intel's first PCIe 2.0 capable chipset was the X38 and boards began to ship from various vendors (Abit, Asus, Gigabyte) as of October 21, 2007.[13] AMD started supporting PCIe 2.0 with its AMD 700 chipset series and nVidia started with the MCP72.[14] The specification of the Intel P45 chipset includes PCIe 2.0.

PCI Express - Wikipedia, the free encyclopedia

 

[iPROTechman]

Ever thought the 8800GT is just dead now?

 

[C0RR0SIVE]

He tried a higher end GPU and said it also doesn't work, just curious as to what his specs are.

 

[Slaymate]

Got a new PSU...about to try it out *fingers crossed*

What kind / size of a psu?

 

[C0RR0SIVE]

He said it was 650w, never listed specs of it -.-