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View Full Version : Cycles off, then on, then off, etc


TheGreatSatan
06-29-2011, 01:39 AM
This is already in my worklog, but I thought I'd ask here too

I just put four 4GB DIMMS in my new ZX Gold PC. Before I had the RAM I was using a single stick of Kingston RAM in slot number one and it was flawless. When all four slots are occupied with memory the computer would cycle on and off every few seconds.

I press the power button and it turns on for 2 seconds, then shuts off for two seconds, and then it's on again, over and over dozens of times till I kill the master switch on the PSU

http://www.pcmodhouse.com/sitebuildercontent/sitebuilderpictures/p1080947.jpg

I tried every combination of the memory and it runs fine when slots two, three and four are occupied. It's only when I put the fourth stick in slot one that the rebooting cycle begins. I know the RAM is fine, because I've tried them all, each alone in slot number one and it boots just fine. I read the manual and it appears that the system will still run in dual channel with 3 slots occupied, so it seems that this system will just have to do with only 12GB instead of 16.

http://www.pcmodhouse.com/sitebuildercontent/sitebuilderpictures/p1080950.jpg

Ever seen this?
Fuganater
06-29-2011, 01:54 AM
Rage does this now kinda. It turns on, then off, then on. Sometimes off twice. After 1 or 2 times off it does boot. I haven't had time to investigate.
Fuganater
06-29-2011, 01:55 AM
Also whats the max RAM for 7 Pro? I know each 64bit version has a different limit.

EDIT: NVM...

Starter: 8GB
Home Basic: 8GB
Home Premium: 16GB
Professional: 192GB
Enterprise: 192GB
Ultimate: 192GB
billygoat333
06-29-2011, 02:22 AM
wow... I have pro and I can have THAT much ram?? giggity.
TheGreatSatan
06-29-2011, 09:56 AM
I know it's not the OS because it never even gets to the post screen. And I know the board can handle 32 gigs
mDust
06-29-2011, 10:10 AM
RAM can be a tricky thing. Sometimes they can be optimized for Intel or AMD chipsets like my current modules. Mine are optimized for P55, and don't run as well on my 890fx. Every once in a while my PC goes to start, powers off, and then powers back on before POSTing which didn't happen with my old RAM. It's never failed to boot though. It sounds similar to what's happening with yours. Might be something to look into.
Check the timings, voltage and all that if you can. JEDEC doesn't always work correctly. Manually set the proper voltage, lower frequency, and loose timings to see if that helps. Most boards can't run gargantuan amounts of RAM at maximum rated speed.
TheGreatSatan
06-29-2011, 12:18 PM
It's all 1333. It's actually triple channel memory, but that shouldn't matter. Ram is Ram, no matter how it's bundled for sale
TheGreatSatan
06-29-2011, 05:07 PM
Another thing. The manual calls for 1.5V, but I'm using 1.65V. Does it really matter?
mDust
06-29-2011, 07:21 PM
Another thing. The manual calls for 1.5V, but I'm using 1.65V. Does it really matter?

Yeah, RAM is very sensitive to voltage. Run it at what the manufacturer specs and not much more...even when OC'ing.
Notyab
08-14-2011, 12:01 AM
Can you change the Voltage in bios? Try to clock it down like the suggestion above. Had that issue with my old intel board.
Twigsoffury
08-14-2011, 12:40 AM
Another thing. The manual calls for 1.5V, but I'm using 1.65V. Does it really matter?

haha i was about to say check the voltages.