Hey Guys, Changed a few bits around on my PC's this weekend and I have come across an memory issue, wondering if anyone might be able to shed some light. Components 1200watt PSU - branded (forget which) MSI Gaming 5 z97 - New 16gb (2x8) Corsair Memory 1600mhz - New i7 4970k - taken from my other rig Quad Port Intel PCI-Ex4 Network Card OCZ PCI-Ex4 240gb SSD Intel 520 240gb SSD Intel RS25DB080 (PCI-E X8)- Raid Controller (http://www.intel.com/content/www/us/en/servers/raid/raid-controller-rs25db080.html) Note; all of the above are on the latest BIOS and Firmware Note; no Overclocking (or intention) So basically, the Motherboard tells me to use slots 2 and 4 for the memory. When I do this as a bare boot build, BINGO everything is fine, boots up etc. Completes all stability tests When I plug in the INTEL RAID CARD - The machine wont boot to POST. showing a 55 error code on the diag LED's on the board, which translates to error detecting the memory. If I add everything BUT the RAID card, boots as per bare boot build mentioned above. I have tried the RAID card in each of the PCI-E slots, I have even forced the mobo to boot as x8x4x4 to ensure it was detecting the correct speed. Now... here is the odd part; If configure with FULL build, but only one slot of memory, in slot 1 on the board, it boots perfectly. So that made me think it was a dual channel issue... But if I configure slots 1 and 3, it also boots (and is perfectly stable that I can tell) with the full 16gb of ram, dual channel working fine. So it would seem that all the individual parts are "working as expected" but when I configure them as per recommended process, IE slots 2&4 it fails to boot. To be honest, I am quite happy with slots 1/3 working and by all accounts its only there to stop the HSF fouling the first memory slot, but I dont have this issue, BUT i'd love to solve the challenge - ANYONE!!? B
It's to do with one of the pins on the pci-e slot that links to the memory channels. I had a similar issue with a Perc card & an X58 board. When I connected it I lost a whole memory channel. I got round it by putting a bit of tape (a really thin bit) over the 4th or 5th pin on the RAID card and it all worked
Duck tape! Of Course why didn't I think of that!!! I am going to try this as soon as I get home! Watch this space, +1 Saspro
Good to know, I've been looking for a card for my p6t which has already lost a memory channel, likely to the bent pins on the socket.
One of my x58 computers has lost a memory channel, I assumed it was because it was old and is running a custom BIOS to unlock SLI - but I just realised I have a PERC controller in there and I haven't taped off that pin. Will look into this, thanks saspro
http://www.overclock.net/t/359025/perc-5-i-raid-card-tips-and-benchmarks For the pins you need to tape
Just thought I would post an updat in case it helps anyone else - a dell perc h310 definitely takes out the second memory channel on my x58 motherboard. Given that I am not running RAID on that of now I simply took it out and used the onboard controller.
