EX58-UD4P Constant Reboots

[punisher]

EX58-UD4P (F8,F9b,F9d,F9 FINAL)
i7 920 (SWAPPED WITH ANOTHER 920 FOR TESTING PURPOSES)
EX58-UD4P (F8,F9b,F9d,F9 FINAL)
i7 920 (SWAPPED WITH ANOTHER 920 FOR TESTING PURPOSES)
XIGMATEK HDT-S1283
OCZ GOLD 6GB OCZ3G1600LV6GK<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
CORSAIR 750HX (REPLACED A 550VX)<o:p></o:p>
VISTA ULTIMATE 64<o:p></o:p>
<o:p></o:p>
For the first three weeks this board/CPU/memory combo was dead solid. It ran at 3.5 Ghz without a problem. To date I have never had a BSOD or freeze except for when I was finding the upper limits of my memory early on. <o:p></o:p>
<o:p></o:p>
The problem is this system reboots whenever the hell it feels like it. It will reboot during games, it will reboot at idle when the CPU is idle (29-31C temp). It will reboot when I am in the BIOS screen. It will reboot no matter the dozens of voltage combinations I try. I have swapped RAM, I swapped CPUs, I swapped PSUs, I have unplugged fans from all headers, I have removed the motherboard from the case and booted with only a hard drive hooked up. I have tried every combo I can think of and I am out of options (I think). I tried voltage settings listed in this forum, I have tried numerous memory timings & voltages. <o:p></o:p>
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I built a rig for a customer (920 with a EX58-UD4P) and it had been flawless, which is why I went with the same combo. I am lost and would welcome any ideas. I will be happy to provide any more info you need.<o:p></o:p>
<o:p></o:p>
Thank you.

[SolidBladez]

Re: EX58-UD4P Constant Reboots

Does it reboot when at stock? What kinds of test(s) did you use to determine the stability at 3.5GHz?

[punisher]

Re: EX58-UD4P Constant Reboots

Does it reboot when at stock? What kinds of test(s) did you use to determine the stability at 3.5GHz?

It reboots at stock speeds, it reboots at lower than stock speeds, it reboots at silly slow memory speeds.

I ran Orthos and Intelburn test for stability checks. It will still go through burn test with no errors, sometimes for hours........until it reboots. Like I said, never a BSOD, never a freeze, just constant reboots. It can run fine for hours, it can reboot every few minutes, CPU load/speed has no bearing on the problem.

[qwertylesh]

Re: EX58-UD4P Constant Reboots

try two pieces of the ram, make sure at stock speeds your running the uncore at twice the speed of the ram.

I had a bad kit of the 1333LVGK and it would hard restart when superpi'ing at 32M but only in triple channel, after borrowing and trying a kit of (QVL) cheapy kingston 1333, I worked out it was a bad kit, got it swapped under doa and all was well, never had a problem with instability/hard restarts since.

[punisher]

Re: EX58-UD4P Constant Reboots

Well, I have run the system with 1,2 and 3 sticks. I have run the sticks in different slots. It is hard for me to accept all 3 sticks have problems in all 3 slots. I have to work on other peoples stuff all day long, it just bites when my stuff acts up as well.

Will verify uncore/RAM ratio.

[genec57]

Re: EX58-UD4P Constant Reboots

Unusual though it may be I would tend to suspect the Corsair HX850. Even the very best PSUs go bad. In my experience the spontaneous reboot problem has almost always been a bum PSU.
Try a substitute and see if it works.

[punisher]

Re: EX58-UD4P Constant Reboots

Well, I replaced the PSU, moving from the 550VX to the 750HX. It was doing the same thing with both PSUs. My old setup is now the family HTPC and I needed the 550VX for that. Like I said, it acted up with both PSUs. I even went so far as to set up my Fluke on a spare molex to monitor voltage on the 550, and it was rock solid 12.16 volts even during reboots. A bad PSU crossed my mind early on as I have read about that problem.

[qwertylesh]

Re: EX58-UD4P Constant Reboots

about the uncore discussion, i found when I raised my dram multi up to 10 (so my ram ran at its proper 1333) the uncore would still only run at 2.1ghz when set to auto, this caused me instability, after raising my uncore multi to 20 (2.6Ghz), those problems went away, but as i mentioned i also found i had a bad kit of ocz ram aswel which caused me intermittent hard restarts when in tri chan.

Since you work on systems all day much like myself, i dont need to say, strip it down etc etc borrow test parts. etc :)

Im confident you'll work it out.

[Lsdmeasap]

Re: EX58-UD4P Constant Reboots

Can you borrow a different brand of PSU? Some have been known to have issues, especially this one if the model is an older one as Seasonic's found an issue with them and have remade the lineup due to that.

Uncore must always be 2x the memory multi, or above

[punisher]

Re: EX58-UD4P Constant Reboots

Well, besides my two Corsairs, I have an old Enermax 375 I suppose I could try.

Anyways, I moved RAM around, again, and ran Memtest last night (no errors), swapped in another stick and ran it again this morning for about 9 hours (no errors). Just paranoid about the RAM I suppose.

If you could, have a look at some of my current settings and see if anything sticks out as a problem. Thanks again for all of the help, it is much appreciated.

QPI CLOCK RATIO 36
RAM 1333
QPI 3333
LOAD LINE CALIBRATION ENABLED
CPU CORE 1.2525V NORMAL
QPI/VTT 1.175V
IOH CORE 1.1V
DRAM VOLTAGE 1.64 V
RAM TIMING 8-8-8-24-1

I played with QPI ratios and had it at 2666 (twice RAM speed) and it made no difference.

[Lsdmeasap]

Re: EX58-UD4P Constant Reboots

Hmm, not sure if a 375W would help things any, but worth a shot I suppose. If you do try it, use only the minimal and no drives or extras.

Sure I can look at your settings, can you please give them to me in full so I can best review and advise. Things like QPI, please give the x amount such as x12

This is your ram correct? Just checking to be sure
OCZ Technology | Products | Memory | OCZ DDR3 PC3-12800 Gold Low-Voltage Triple Channel

You may need to set 1.66 ram voltage and more QPI/Vtt, especially so if you plan to keep using more than 2x your ram multi.

But please post in full and I will offer you my thoughts

This is Just a template I use to ask people their settings, pay no attention to the numbers in it, replace with yours

0X00000050 << Incorrect Memory Timing/Freq or Uncore Multi
0X00000124 << Incorrect QPI/Vtt Voltage (To Much/Not Enough)
0X00000101 << Not enough Vcore Voltage

CPU = Model #
Motherboard = Model, Revision #
BIOS Version =
Ram = Brand, Model#, Part#, And or Link

[B]Advanced CPU Features:[/B]
CPU Clock Ratio ................................ [20x]
Intel(R) Turbo Boost Tech .................. [Enabled]
CPU Cores Enabled ............................ [All]
CPU Multi Threading .......................... [Enabled]
CPU Enhanced Halt (C1E) ................... [Disabled]
C3/C6/C7 State Support .................... [Disabled]
CPU Thermal Monitor ......................... [Enabled]
CPU EIST Function ............................ [Disabled]
Virtualization Technology ................... [Enabled] << Disabled if you do not use Vmware or Virtual PC Programs
Bi-Directional PROCHOT ..................... [Enabled]


[B]Uncore & QPI Features:[/B]
QPI Link Speed .............................. x36
Uncore Frequency ..........................  (Always 2x memory Multi or 2x +1)
Isonchronous Frequency ..................[Enabled]


[B]Standard Clock Control:[/B]
Base Clock (BCLK) Control ................ [Enabled]
BCLK Frequency (MHz) .....................
PCI Express Frequency (MHz) ........... [100]

C.I.A.2 [Disabled]

[B]Advanced Clock Control:[/B]
CPU Clock Drive ..............................[800mV]
PCI Express Clock Drive ................... [900mV]
CPU Clock Skew ............................. [0ps]
IOH Clock Skew ............................. [0ps]


[B]Advanced DRAM Features:[/B]
Performance Enhance ...................... [Standard]
Extreme Memory Profile (X.M.P) ......... [Disabled]
System Memory Multiplier (SPD) ........ [AUTO]
DRAM Timing Selectable (SPD) .......... [Manual]

[B]Channel A + B + C

Channel A Timing Settings:[/B]
##Channel A Standard Timing Control##
CAS Latency Time ......................
tRCD .......................................
tRP .........................................
tRAS .......................................

##Channel A Advanced Timing Control##
tRC ........................................  (Should be = tRAS + tRP or above for stability)
tRRD .......................................
tWTR ...................................... (Must be Write to Read Delay/Same Rank - (tWL + 4)
tWR ........................................
tWTP .......................................
tWL ........................................   (tWTP Must = tWR + tWL + 4)(tWL Must be CAS Latency -1)
tRFC .......................................
tRTP .......................................
tFAW ......................................
Command Rate (CMD) ................

##Channel A Misc Timing Control##
Round Trip Latency ...................



[B]Advanced Voltage Control:

CPU[/B]
Load Line Calibration ................. [Disabled]
CPU Vcore ...............................
QPI/VTT Voltage 1.150v ............
CPU PLL 1.800v .......................

[B]MCH/ICH[/B]
PCIE 1.500v ...........................
QPI PLL 1.100v .......................
IOH Core 1.100v .....................
ICH I/O 1.500v .......................
ICH Core 1.1v ........................

[B]DRAM[/B]
DRAM Voltage 1.500v ..............
DRAM Termination 0.750v [AUTO]
Ch-A Data VRef. 0.750v [AUTO]
Ch-B Data VRef. 0.750v [AUTO]
Ch-C Data VRef. 0.750v [AUTO]
Ch-A Address VRef. 0.750v [AUTO]
Ch-B Address VRef. 0.750v [AUTO]
Ch-C Address VRef. 0.750v [AUTO]