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System instability - frequent freezes

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Sep 14, 2011
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Motherboard
Z97X-UD5H rev. 1.0
CPU
4690K
Graphics
EVGA NVIDIA GeForce GTX 650 (not Ti)
[SOLVED - use Clover] System instability - frequent freezes

Occasional system freeze has been an infrequent intermittent problem since I originally built the system in summer last year. Manifests as unpredictable freeze requiring hard restart. Nothing in any logs to provide clues as to the problem. I was running Mavericks.

Two days ago I installed Yosemite 10.10.2 on another SSD and have been trying to run it. The system now freezes several times a day.

I believed the problem was related to memory since the sticks, since this is often mentioned here as a cause of freezes. The sticks I had (Config 1 below) were not on Gigabytes list of verified modules for the motherboard. So today I replaced the memory sticks with 4 new ones that are on the list as verified in configuration of 4. It got no better. Two freezes within a couple of hours.

The other thing everyone says about system freezes is PSU. It is a Corsair CX430 which claims "Haswell compatibility".

So I'm totally stuck now. My computer is useless and I can't get any work done. I really need help and would greatly appreciate any suggestions.

GA-Z97X-UD5H
i5 4690K
HD 4600
No GFX card
Corsair CX430
32 GB Memory
Config 1: Four 8 GB DIMMs from two 2x8G kits Crucial BLS2CP8G3D1609DS1S00
Config 2: Four 8 GB DIMMs from two 2x8G kits Crucial BLT2CP8G3D1608DT1TX0
SATA devices:
- OCZ Vertex 3 90G with Yosemite system volume
- Samsung 840 Evo 250G with Mavericks system volume
- 2 x WDC WD10EALX-009BA0
- 2 x WDC WD30EFRX-68EUZN0
- 2 x Seagate ST2000DL001-9VT156
Two Dell U2412M displays
Fractal Design Define R4 case

Installation was according to the current "Installation Guide", which I followed to the letter. BIOS settings are pretty much as described in that guide and MultiBeast selections were standard for this hardware.

Anything else I may need to mention, please ask.
 
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Joined
Jan 18, 2014
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Motherboard
Gigabyte Z87X-UD3H
CPU
i7-4770K
Graphics
HD 4600
Mac
  1. MacBook Pro
Mobile Phone
  1. Android
Thats interesting. I didn’t try Yosemite yet, but Mavericks freezes on my built too from time to time totally unpredictable. Changing Bios Settings made it better, but it didn’t go away entirely.
I only tried Clover from a Bootstick and that made no difference. Do you think it makes a difference if OSX is installed with Clover?

Is your system still freeze free?
Thanks!
 
Joined
Oct 20, 2012
Messages
160
Motherboard
Gigabyte GA-Z270X-Ultra Gaming - 32G Ram
CPU
Core i7-7700k
Graphics
Internal - HD630
I had similar issue when I loaded Yosemite with Uni/Multibest.. Everything loaded fine, but was getting random freezes. I started from scratch with Clover and 3 months later, not a single lock up and the system is rock solid. Clover was a learning curve and I hope nothing goes wrong now as I have forgotten about everything within Clover now anyway :)

good luck

-Brad
 
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