Hi folks,
first, my build:
- OS X Yosemite
- Gigabyte Z87N-Wifi
- intel i7-4790K
- HD4600 graphics
- Silverstone ST45SF SFX12V 450W PSU
- Silverstone Argon series CPU cooler
- Samsung 840EVO 500GB SSD
- GMYLE bluetooth adapter.
Done a bit of research and I've found lots of situations where people are having freezes most likely caused by RAM, so I've gone and tried a few of the 'fixes' for myself. The Z87N-wifi is a mini ITX with two DIMM slots, that I have occupied with 2x 8GB Crucial Ballistix Sport (low profile). They are rated for 1600, 1.35V, and 9-9-9-24. The first thing I tried is changing the voltage to suit this rating, as my BIOS settings on default were keeping the voltage around 1.38V. Not really a big deal, but by forcing it at 1.34, the system maintains it at 1.356V. I have XMP off, as I have a SFX PSU for 450W which I thought would probably not be "Haswell ready" as some PSUs advertise and should have XMP disabled. Comes with the territory of fitting an i7-4790K in a very small miniITX build, where you need such a tiny PSU. But this Silverstone SFX PSU is specifically said to support Haswell.
Now, I haven't done a memtest on my RAM, but I have removed one DIMM and had the machine run smoothly for a few hours without a freeze, and restarted multiple times to see if I could force a freeze, since they most often occur less than 5 minutes after startup. I have done this with both DIMMs individually. Neither causes issues on its own. It's the introduction of both at once that is causing problems. It doesn't really matter what task is being performed, sometime within 5 minutes after startup, the machine freezes. No KPs on screen, or visual evidence outside of a frozen screen, and no input working. Oddly, when starting up with two DIMMs, the bluetooth USB adapter behaves strangely, either not connecting with my Magic Mouse, or bringing the cursor back to the top left every time the mouse is raised and lowered. The only way to fix this is to remove and replug the adapter. But as I said, not long after this, I usually get hit with a freeze. This Bluetooth situation doesn't rear its head with one stick of RAM.
So I don't quite know what the diagnosis is here. Does it have something to do with the lowered power draw from the removal of one of the DIMMs? My PSU, while low wattage at 450W is more than enough for the power draw of the actual machine, which should average around 250-300W. Should I try lowering the RAM frequencies to 1330 from 1600? Does this have the potential to damage the RAM? I have read lots about how 4 slot Gigabyte boards cause problems when all are filled, but it seems like some cruel joke that a two slot board would have the same problem, limiting me to 8GB.
EDIT While more stable, I experienced a freeze in sleep mode with only one DIMM. Returned to find the power light on (it's off in sleep) and the fans all going full speed, and a very toasty machine. Could this be a power management issue with the CPU?
submitted by MartySeamusMcfly
[link] [comment]
What is missing? Please comment to help! ...[source] For more info try www.iatkos.net
Post a Comment