I am trying to double my memory to 12gb. Here are my
specs from Cyberpower purchase couple years back that always worked fine:
CPU: Intel® Core™ i7-950 3.06 GHz 8M Intel Smart Cache LGA1366 MEMORY: 6GB (2GBx3) DDR3/1600MHz Triple Channel Memory Module (A-Data Gaming Series with Heat Spreader - These are 1.5v cards (9 9 9 24)
MOTHERBOARD: * (3-Way SLI Support) GigaByte GA-X58A-UD3R Intel X58 Chipset SLI/CrossFireX Ultra Durable™3 Triple-Channel DDR3/1600 ATX Mainboard w/ 7.1 Dolby Audio, eSATA, GbLAN, USB3.0, 2 x SATA-III RAID, IEEE1394a, 4 Gen2 PCIe, 2 PCIe X1 & 1 PCI
OVERCLOCK: Extreme OC (Extreme Overclock 20% or more)
POWERSUPPLY: 850 Watts - Corsair Professional Series Gold AX850 80 Plus Power Supply
VIDEO: AMD Radeon HD 6870 1GB GDDR5 16X PCIe Video
I bought 3 more 2gb DDR3/1600 MHz cards (A Data Series) that are also 9 9 9 24, but 1.55-1.75v. I didnt realize the voltage difference beforehand.
I initially installed the new ones next to the old all in the same color memory slots, which switch from old, new, old, new, old, new. When I did this I was able to get into the bios and windows to see that both were recognizing 12gb. Eventually it did crash, I dont recall what I was doing at the time. Now whenever, I start the computer I am getting looooong beep sounds everytime, and then it says "The system has experienced boot failures because of overclocking or changes in voltage."
I noticed that my system automatically put each channel timing at 7 7 7 20 and I believe it was set at 1.5V at 1033 Mhz. I don't know if this is because this is what it was set at before, but I assume so. I think it was (I should have checked beforehand or backed up the BIOS settings, but didnt).
Anyways, I started switching the timings to 9 9 9 24 as that is what it says on both cards, and I also bumped up the voltage to 1.56v to cover the 1.55v modules. However, this won't be even let me load windows without crashing.
I am obviously totally new at figuring out issues like this and don't really know what to do. I am thinking it might be related to the cpu overclock that I do have, that worked fine with the initial 3x2gb ram? I also noticed the System Memory multiplier was initially set at 12x, which went to 1800 something Mhz. This was over the memory unit speeds, but as I said I never altered that before and it was working out of of the box with it set like that (overclock settings I presume).
So I don't know. Maybe I just cant mix up different voltage cards?
Thanks for any insight. If you need more information just let me know, as I am not in front of that computer at the moment.