I'm not sure where the chip is exactly. It should be under the southbridge heatsink, about 2cm by 2cm. 

It's gonna take some serious heat gun voodoo to reflow that chip or replace it. This isn't a PS3 :-)

If the plx chip is really burnt out it won't show up when using nvflash --list command.
 

Sajin
If the plx chip is really burnt out it won't show up when using nvflash --list command.
 

Well I tried this, and I don't see an indication of the PLX. But in Windows I found something referring to a Pci-to-Pci Bridge and that seems to be active. According to my researh this should come down to the same thing (could be wrong) but I guess nvflash made the verdict somewhat clear.. I guess I can't do nothing now. This sucks.

Well I guess it's settled then, this board is a half working mobo now..tried everything. Sure i can plop something in pci 5 to 7 but that was not the purpose..If anyone is able to help me out with an SR2 in 100% working condition at a nice price and wants to ship it to me (Belgium) then feel free to PM me or something..I'm bumbed out

Quick question though; could it be a faulty Nvidia NF200 chipset or the Intel 5520 chipset? I guess the 5520 since that one provides the lanes..
 

If you don't see BR04 (05B1h) listed under nvflash --list command then your NF200 isn't working.
 

Sajin
If you don't see BR04 (05B1h) listed under nvflash --list command then your NF200 isn't working.
 

interresting, I did not see the PLX one to which you referred but I could detect 2 or 3 adapters (it was late, before bed, can't remember exactly), one being the GTX580 I mounted to test. The card was in slot 5. The 9500GT in slot one did not show up. I will go and look at it again after work but I'm curious; if the BR04 (05B1h) shows up then I guess the chipsets are fine and the problem is something else? Thanks in advance of putting in your time and effort guys. loving the forum already!

NOXX1S

Sajin
If you don't see BR04 (05B1h) listed under nvflash --list command then your NF200 isn't working.
 

interresting, I did not see the PLX one to which you referred but I could detect 2 or 3 adapters (it was late, before bed, can't remember exactly), one being the GTX580 I mounted to test. The card was in slot 5. The 9500GT in slot one did not show up. I will go and look at it again after work but I'm curious; if the BR04 (05B1h) shows up then I guess the chipsets are fine and the problem is something else? Thanks in advance of putting in your time and effort guys. loving the forum already!

Yep. Glad you like the forum. 

You should be aware that there are two NF200 bridges on the SR-2. One drives slots 1-4, the other slots 5-7. Each provides multiplexes 16 lanes into 32. The upstream lanes are provided by the Intel 5520 (36 in total, other 4 are used for the NICs, SATA-3, audio, IIRC). Symptoms you describe (nothing in slots 1-4 working) implies one of the NF200 bridges has indeed failed, rather than just individual lanes. If the 5520 had failed the board wouldn't work at all.

gordan79
You should be aware that there are two NF200 bridges on the SR-2. One drives slots 1-4, the other slots 5-7. Each provides multiplexes 16 lanes into 32. The upstream lanes are provided by the Intel 5520 (36 in total, other 4 are used for the NICs, SATA-3, audio, IIRC). Symptoms you describe (nothing in slots 1-4 working) implies one of the NF200 bridges has indeed failed, rather than just individual lanes. If the 5520 had failed the board wouldn't work at all.

Yeah i tought as much :/ I guess I need to unmount the waterblock and take a closer at the nf200 chips. I guess the top one drives the first 4 lanes? (photo found on the forum, credit goes to tbp7463)
 

I found this one on Ebay:
wwwdotebaydotcom/itm/1x-New-NF200-P-NF200-P-SL1-A3-NF200PSLIA3-NF200-P-SLI-A3-NF200-P-SLI-A3-BGA-Chip/401130506136?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D39850%26meid%3D7cfce1f77fb943d9a521c0734a173600%26pid%3D100005%26rk%3D2%26rkt%3D6%26sd%3D271103302194 ( I cant post url yet due to restrictions since I'm an early member but this is kinda urgent..I hope the mods forgive me)
 
The place I work at works together with a company that has a special machine capable of detaching and mounting motherboardchips. I might give them a call and see what they charge if I could get a hold of this chip. I might even buy two just to be sure since the price is superlow and shipping is free. Any thoughts?