PCI-E Gen 2.0 Bug X38/ X48/X58

[Tamkinat]

In collaboration by means of a number of users on the nVidia forums and ASUS forums I am trying to bring together or gather data as to what boards are exaggerated by the notorious PCI-E Gen 2.0 bug which come into view to be distressing Dual PCI-E 16 Intel Boards and nVidia cards. The symptoms of the PCI-E Gen 2.0 bug are that your graphics card simply operates at PCI-E Gen 1.1 mode.

[Birdie]

Where here the board does present itself as a Gen 2.0 board, the card simply works at Gen 1.1. I and a small number of additional users have been continuously trying to get these tribulations resolved, additional than motherboard vendors are not extremely accommodating. The information in sequence we have is the PCI-E Gen 2.0 has been put out of action on X38/x48/X58 boards by means of a certain undisclosed, yet inveterate by nVidia SMBIOS bug in Intel BIOSes as of April 2009. Intel DX38BT motherboard by means of BIOS 2006 is not exaggerated by the PCI-E Gen 2.0 bug, it seems that this contains a fix. The DMI information in sequence on ASUS X38 boards is odd, says our PCI-E16 slots are empty. Intel resolved a Slot mismatch tribulations on their boards in July 2009 stating it resolved a PCI-E Gen 2.0 tribulations. Most X48 boards are unchanged, and even fewer X58 boards have encompass this bug. The nVidia 9800GX2 and GTX295 do not come into view to demonstrate this bug as their NF200 chips report the PCI-E connection speed direct to the GPU's. Give pleasure to if you have comprise the time might you take a screenshot of GPU-Z showing your card's PCI-E transfer rate and position this alongside a CPU-Z screenshot demonstrating what motherboard and what BIOS revision you are running.

[David23]

So you are saying that even despite the fact that GPU-Z demonstrates the bus interface at x16, it simply runs at PCI-E 1.1 x16 additional than not PCI-E 2.0 x16. I have comprise some screenshots and optimistically they help. Does it simply have an effect on to Nvidia card additional than not ATI. My board is a Maximus Formula X38 that flashes to a Rampage Formula. I have encompass the GTX 275, GTX 285, GTX 295 Well if that's the case the bug is in addition in P35 chipset as well, here is my 9800GTX+ on an Asus P5K Pro.

[Archibald]

What most of them observe here is that your GTX 275 and GTX 285 are working with in PCI-E 1.1 mode. The GTX 295 corresponds by means of tests performed on 9800GX and GTX 295 solitary PCB whereby the NF200 reports PCI-E 2.0 to the GPU's and the driver. The ATi cards come into view unchanged, unless you utilize HWinfo32 (or a number of additional programs that measures PCI-E Bandwidth). For a number of reasons ATi cards do not report information in sequence similar to nVidia cards (such as memory usage, etc). Thanks for the information in sequence, what is concerning is that Rampage Formula does not have comprised this tribulations, yet you flashed your BIOS to a Rampage Formula and you tranquil have this problem.

[CACTUS101]

It comes into view your motherboard is not exaggerated by this irritating bug. We are tranquil no closer to finding a fix, what we have comprised and noticed is that the DMI slot structure is the entire wrong. This information in sequence has been passed onto ASUS, so who is familiar with fingers crossed a fix is in sight. The extraordinary thing is his 8800gt shot was when it was in the similar P35 board ( PCIe 1.1 as mentioned ) yet it reports PCIE 2.0 ( by the method the 8800gt is PCIE 2.0, it was Nvidias first If I recall ) Rather bizarre EDIT : I looked into it and a number of people seem to consider that a newer revision of the P35 chipset supports PCIE2.0 additional than without authorization. Whether this is true or not is beyond me. Immediately thought this was interesting.

[Balamani]

I have encompass and noticed that your card is working @ x4 Gen 2.0. Have you by several chance got dirt on the slots or the card. Or are you working with Tri SLi or impressive. It is unusual to observe an nForce 790 based motherboard exhibit such an extraordinary tribulations. This would explain the card and slot mismatch on your GPU-Z screenshot. A PCI-E 2.0 card working on a PCI-E 1.1 slot. I have not heard regarding some boards being PCI-E 2.0, on the other hand what you say would create sense if they were extremely late production models out at the similar time as the X38 and X48 boards, additional than immediately previous to the P45 was released. Thanks for the information in sequence on overclocking101 Similar behavior has been noticed on a ASUS Maximus III Extreme, on the other hand that was running PCI-E Gen 1.1 by means of immediately one card in the system (@ x16) and then x8 by means of two cards in the system. Perhaps your eVGA board is half fixed. I would maintain an eye out for BIOS updates. As far as I am aware P45 boards are immune to these tribulations, on the other hand if several P45 readers are out there, please do provide screenshots confirming or contradicting what we have found so far by means of P45 boards. Anymore X38 and X48 users determine to be most.