As title, when I try to use Prime95 (All 3 Mode tested) to try my new bought pc stability, it always crash after CPU full load for one minute less or more, but my system is NOT make any overclock, all is stock/AUTO setting except RAM is not set to AUTO, which is set to stock value of RAM module info.

The symptom when it crash is,
- No Screen Output (Monitor become standby mode after system crash), Not Blue Screen
- All fans in pc still running (CPU, GPU and PSU)
- LAN indicator light closed after system crash
- Press reset button have response and it still able show POST and load into system.

When I try to trace the problem, I found my HWMonitor CPU VCore is showing weird when try full load by using Prime95. When system is idle, the CPU VCore is 1.318-1.328v, but after CPU full load, CPU VCore is huge drop to 1.218-1.228v.

The CPU Temp while idle is 22-23c and full load is 49-51c.

Here is my spec info,
CPU: AMD FX 6300 3.5GHz AM3+
RAM: G.Skill DDR3 Ripjaw X 2x4GB 2133 9-11-11-31-2T @ currently using 1866 9-11-11-31-2T, because my MBoard just allow maximum 1866 for FX series CPU.
MB: Asrock 960GC-GS FX
GPU: Sapphire Dual-X R9 270X 2GB OC Boost
PSU: Themaltake Toughpower 650W 80plus Gold
SSD: Plextor M5S 128GB
HDD: WD Green 1TB x 1, WD Green 2TB x 1
ODD: LG DVD Writer 24x
PCI: PCI to USB2.0 4+1 port

Please help and suggest me a solution.

Thanks.

This post has been edited by ben210590: Dec 16 2013, 08:59 PM

Have you tried running the memory (manually) at much lower speeds such as DDR3-1600 or DDR3-1333? Is this machine still brand new? I would recommend changing that motherboard as (from pictures of that board found on the net) it seems to only have 3-phase VRM (which I would consider very inadequate for power hungry AMD FX processors)...

This post has been edited by lex: Dec 16 2013, 09:43 PM

what's the voltage on the RAM set to?

1. Ya, tried DDR3-1600 9-9-9-31-2T, the problem still happen.
2. Is a partial new machine, all core component is upgraded except SSD, HDD, ODD and casing.
3. If motherboard only have 3-phase VRM will affect the usage? because I saw the motherboard was support AMD FX 6300, and also I don't have overclock my CPU, all is stock setting.


I according the RAM module info, set my RAM voltage to 1.60v

It doesn't matter if its stock settings, just very inadequate IMHO. For 4-"core" and 6-"core" AMD FX processors, get a motherboard with at least 4-phase VRM or better. And for 8-"core" AMD FX processors, get a motherboard with at least 8-phase VRM or better. Anyway, who chose those components. Seems very unbalanced when it comes to utilizing budget (due to performance RAM in there). For AMD FX processors, IMHO not recommended to use low budget boards (unlike Intel-based systems)...

So should I change my motherboard to suit my processor? Too bad if need to change the motherboard...

If want to change motherboard, which motherboard is suitable for me? Can have you suggestion?

This post has been edited by ben210590: Dec 16 2013, 10:22 PM

Should have inquired here first: Computers -> Hardware -> Hardware Questions & Answers before deciding on which components to buy. Perhaps can try asking there first, and please include a budget. If its still brand spanking new then can ask for motherboard upgrade from the shop (includes extra money top-up). The money from the performance RAM could have been used for the better motherboard. For Intel based systems, can use low budget boards (as those processors have much lower power reqirements). However for AMD FX processors, due to its higher power requirements, low budget boards with inadequate VRMs are not recommended.

This post has been edited by lex: Dec 16 2013, 10:40 PM

Ok, Thanks for helping me a lot.