masterplan

Heya, first post - but this place seems like it has a good wealth of knowledge on 'boards.

I just got one of these boards as I wanted to build up a Hyper-V box for cheap, but I have a weird issue is the fact that I can't populate all 6 slots. The setup is:

i7 920, stock cooler
Above mentioned board with latest BIOS
2xKingston Value 12G 1333MHz kits (KVR1333D3N9K3)
8600GS 512Mb

The issue I am having with the board is when I have 1,2,3,4,5\1,2,3,4,6\1,2,3,4\2,3,4,5 populated - it boots fine, when I have 1-6 populated it fails to boot with 3F error. I have tried all sticks in slots 5/6 to no avail.

I have tried forcing the DRAM voltages to 1.5v (which it says on the stickers on the RAM) and also forcing the RAM to 1333Mhz, still no joy.

I am pretty sure it's some kind of issue with BIOS settings, but I have no clue where to look - I'm not a numpty when it comes to PCs, I just don't delve much into the enthusiast world anymore.

So if anyone has any clue of what it could be, or things I could try I'd really appriciate it - because as you can imagine virtualization is all about RAM.

Thanks,

-Rich

Offler

I had similar problem. The key was to lower CAS latency by one step down when all slots are occupied. Other possibility is to check which of your memory divider works and which does not.

However I have completely different chipset...

I would also check the PSU. I had constant problems with memory voltage regulators when all slots were occupied.

masterplan

As I mentioned - not a noob, but just out of the game, out of the following settings, I'm assuming:

DRAM Timing
Channel Interleave Setting: AUTO
Rank Interleave Setting: AUTO
Memory LowGap: 1536M

DRAM Command Rate: AUTO/1N/2N etc
CAS Latency Time (tCL): 7
RAS# to CAS# Delay (tRCD): 7
RAS# Precharge (tRP): 7
Precharge Delay (tRAS): 24
REF to ACT Delay (tRFC): AUTO
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): AUTO
ACT to ACT Delay (tRRD): AUTO
Row Cycle Time (tRC): AUTO
Read CAS# Precharge (tRTP): AUTO
Four ACT WIN Time (tFAW): AUTO

Would be what I change? Also whats the memory divider, and how do I change it?

The PSU is a brand new 450w Antec, albeit it's value branded - it should still do the trick and have enough juice to power the system which is only rocking 1 1Tb green drive, etc.

Offler

The psu might have some trouble if you are running some high end graphics. If not sure try other PSU at 500 or 550watts

try:
CAS Latency Time (tCL): 8
RAS# to CAS# Delay (tRCD): 8
RAS# Precharge (tRP): 8
Precharge Delay (tRAS): 24

at stock frequency of your memory (should be 1333Mhz according to CPU).

Start at 1,712 volts and go down to 1,5v slowly...

masterplan

Sweet, I will give that a try tonight - as mentioned I'm using a low end 8 series nvidia - so I don't think that will be drawing all that much, it doesn't even have a PCIe power connector.

masterplan

Kinda worked - I now have 24Gb (16Gb usable)

Pushed more volts through it than I was comfortable with, but I found this blog post.

http://fesansom.blogspot.co.uk/2012/...therboard.html

Going to give that a whirl tonight.

Offler

To test whether stable or not try Prime95 torture tests. It worked for me better as LinX or Occt.

Watch your memory voltage, especially how much it drops down under load.

masterplan

So I managed to get even less to work, at my lowest point I managed to get down to just 8Gb visible. Tried all sorts of settings - but I managed to get it up with 20Gb of RAM visible, annoying - but it will do until I calm down and not want to throw this system out the window.

I have this worry that it may be a bent pin on the board - I'm getting another cooler soon as the idle temps I'm getting are way too high for my liking, so I'll inspect it then when I take the chip out to clean it.