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New finding... Please read if your overclocking is not stable.

post #1 of 77
Thread Starter 
Please read this if your overclocking is not stable and you require extremely high voltage.

About a year ago i bought a new psu (ultrax3 1000W) and bought a 2600k. The reason i bought a 1000k psu was to run my SLI gtx 580, watercooling rig, plus 2600k overclock and have headroom for future upgrade. My 2600k overclock required 1.48v to reach 5ghz so i was happy with it.

Now here is what i found

Now almost a year later my rig was not stable and i was force to run it @ 4.6ghz @ 1.440v because in order to reach 4.8ghz i needed 1.52v to get it stable. I thought that my cpu has been degrading over the year because of the high voltage i have been using. I never figure it was another problem. My rig would work beautifully only that my cpu required such a higher voltage now that i was thinking of replacing my cpu. I started noticing (with software) that my 12V PSU line dropped badly (around 11.66V) when under load while at idle was stable at 12v. I figure to get my multimeter and see how low my 12v rail really is, i also notice my 5v and 3v dropping. I was only concern of the 12v cause i run my videocards and almost everything with that line so i only check that one. With my multimeter my 12v rail dropped to 11.51v while load.

I order a new ENERMAX MAXREVO 1350W (i know... overkill) but you cannot blame me cause it was only $209. After installing it i went to my overclocking and see if my psu was causing overclocking instability. Now i find out that i only need 1.424v to get 4.8ghz while with previous PSU needed 1.52v to get it stable (no settings were changed in bios other than the cpu voltage) That a HUGE different in voltage. i ran prime 12 hours rock solid stable while before prime would freeze withing a second at that voltage at the same or even higher voltages.

I believe the voltage drop was causing very bad stability in my rig. My psu had enough power to run almost anything but it wasn't about power, it could not maintain a steady voltage.

So please get a multimeter and check your line just for a peace of mine. You might not be stable because of your PSU.
Do not blame ULTRA PSU cause this could happen with ANY PSU. over time the PSUs start loosing their power and degrade.

Hope this help and sorry for my bad writing skills, english is not my native language.
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My System
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[Intel] i7 2600k @ 4.8Ghz  [Asus] p8p67 Deluxe [Bios] 2001 [EVGA] GTX 580 SLI 950/1900/2200 1.175v [Corsair] Vengeance 8gb (2x4gb) @ 1866mhz 
Hard DriveOptical DriveCoolingOS
[Crucial] M4 256gb Raid 0 (128gb x2) [Samsung] Blu-ray  Watercool  [Win7] ultimate 64bit 
MonitorKeyboardPowerCase
[Yamakasi] 27" 2560x1440 S-ips [Logitech] iluminated wire [ENERMAX] MaxRevo 1350W [Corsair] 800D 
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post #2 of 77
Nice find thumb.gif I'm not familiar with the Ultra brand but your Enermax should last for years. I'm a firm believer in testing with multimeters too. Who has spare high-wattage supplies just laying around for testing purposes (besides me! haha)

edit:

Your English is fine BTW.... Are you going to RMA your Ultra? It would be interesting to see how they treat that problem. +rep for the tip too
Edited by hollywood406 - 12/8/11 at 6:14am
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post #3 of 77
That particular PSU is fine

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=41

Jonny gave it a nice score.

INcidently, I doubt you'll be able to RMA it because it's rippling more, they'll say it's just wear at tear which is pretty much true.

Comps
post #4 of 77
That 12v reading on your old psu is within atx spec of +-5%, and it should make no difference to how much voltage you cpu needs.
space heater
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Samsung 840 Pro 256GB 4 x 2TB Barracudas in RAID10 2 x WD Blue 1TB RAID0 2 x 3TB Seagate Barracuda 
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space heater
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CPUMotherboardGraphicsRAM
Intel 2500k 4.7GHz  Asus P8P67 Pro(B3) 2 x Club3D 280X 3GB 16GB g.skill 1600MHz C9 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Pro 256GB 4 x 2TB Barracudas in RAID10 2 x WD Blue 1TB RAID0 2 x 3TB Seagate Barracuda 
Hard DriveHard DriveOptical DriveCooling
8 x 146GB HP 10k SAS - various RAID levels RAID Controller LSI 9260-8i 512MB LiteOn IHAS124 Noctua NH-D15 
OSMonitorMonitorMonitor
8.1 Enterprise Acer GD245HQ (120hz) LG W2420P LG IPS231P 
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post #5 of 77
Thread Starter 
Quote:
Originally Posted by fluxlite View Post

That 12v reading on your old psu is within atx spec of +-5%, and it should make no difference to how much voltage you cpu needs.

Thats what i always thought, but hand on experience says that it does otherwise.

EDIT: i also mention in my post that my 5v and 3v were dropping but i did not care much of it cause my concern was the 12v and hearing story how PSU with low 12v have burned GPUs and MOBOs. When i received my new PSU i went to do some overclocking WITHOUT expecting any improvements, better overclocking with lower voltage. The reason i bought the new PSU it was because of the 12v dropping but to my surprise i found out that i did have stability problems.
Edited by eduardmc - 12/8/11 at 6:35am
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Hard DriveOptical DriveCoolingOS
[Crucial] M4 256gb Raid 0 (128gb x2) [Samsung] Blu-ray  Watercool  [Win7] ultimate 64bit 
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[Yamakasi] 27" 2560x1440 S-ips [Logitech] iluminated wire [ENERMAX] MaxRevo 1350W [Corsair] 800D 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
[Intel] i7 2600k @ 4.8Ghz  [Asus] p8p67 Deluxe [Bios] 2001 [EVGA] GTX 580 SLI 950/1900/2200 1.175v [Corsair] Vengeance 8gb (2x4gb) @ 1866mhz 
Hard DriveOptical DriveCoolingOS
[Crucial] M4 256gb Raid 0 (128gb x2) [Samsung] Blu-ray  Watercool  [Win7] ultimate 64bit 
MonitorKeyboardPowerCase
[Yamakasi] 27" 2560x1440 S-ips [Logitech] iluminated wire [ENERMAX] MaxRevo 1350W [Corsair] 800D 
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[CM] Storm [Steelseries] Qck+ Creative titanium HD 
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post #6 of 77
Thread Starter 
Quote:
Originally Posted by compuman145 View Post

That particular PSU is fine
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=41
Jonny gave it a nice score.
INcidently, I doubt you'll be able to RMA it because it's rippling more, they'll say it's just wear at tear which is pretty much true.
Comps

Well, the unit has lifetime warranty. I'm just going to rma it and sell the other one when i get it.
ULTRA has excellente customer service, one time i ask for an rma and they did ADVANCE rma. they send me a new unit. i refused the package when i got it cause i only asked for an rma because it was scratch and i wanted it just like new biggrin.gif. They paid both way shipping to.
Edited by eduardmc - 12/8/11 at 6:28am
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Hard DriveOptical DriveCoolingOS
[Crucial] M4 256gb Raid 0 (128gb x2) [Samsung] Blu-ray  Watercool  [Win7] ultimate 64bit 
MonitorKeyboardPowerCase
[Yamakasi] 27" 2560x1440 S-ips [Logitech] iluminated wire [ENERMAX] MaxRevo 1350W [Corsair] 800D 
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My System
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CPUMotherboardGraphicsRAM
[Intel] i7 2600k @ 4.8Ghz  [Asus] p8p67 Deluxe [Bios] 2001 [EVGA] GTX 580 SLI 950/1900/2200 1.175v [Corsair] Vengeance 8gb (2x4gb) @ 1866mhz 
Hard DriveOptical DriveCoolingOS
[Crucial] M4 256gb Raid 0 (128gb x2) [Samsung] Blu-ray  Watercool  [Win7] ultimate 64bit 
MonitorKeyboardPowerCase
[Yamakasi] 27" 2560x1440 S-ips [Logitech] iluminated wire [ENERMAX] MaxRevo 1350W [Corsair] 800D 
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[CM] Storm [Steelseries] Qck+ Creative titanium HD 
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post #7 of 77
Quote:
Originally Posted by fluxlite View Post

That 12v reading on your old psu is within atx spec of +-5%, and it should make no difference to how much voltage you cpu needs.

why would u argue this point when OP has nearly definitive proof that his PSU was messing with his stability?
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CoolingCoolingCoolingOS
|Koolance CPU 370| |Koolance VID-AR699| |Koolance VID-AR697| |Win 7 64bit Pro| 
MonitorKeyboardPowerCase
|U2711| |2x KBC Pokers MX Red| |Cooler Master Silent Pro Gold 1200w| |NZXT Phantom 820| 
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post #8 of 77
Hey +1 for the tip. Just because it is "within ATX specs" doesnt mean it wasnt causing his problems. I had a psu that was well within spec(talking about wattage) and I hooked a meter to it and everything looked good, within range but under load it would instantly shut down. This was driving me crazy because like I said it was within spec. PSU's can cause some weird things to happen. Im glad you discovered what the problem was and didnt buy a whole new 2600k! that would been a lil more pricey.
    
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post #9 of 77
Quote:
Originally Posted by DaXxJaPxX View Post

why would u argue this point when OP has nearly definitive proof that his PSU was messing with his stability?

some people argue with their mothers and always think they are right. The OP definitely narrowed it down to the PSU as the problem and just wanted to share with the rest of us but their always has to be one outta the bunch who disagrees.
    
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post #10 of 77
Quote:
Originally Posted by eduardmc View Post

Quote:
Originally Posted by fluxlite View Post

That 12v reading on your old psu is within atx spec of +-5%, and it should make no difference to how much voltage you cpu needs.

Thats what i always thought, but hand on experience says that it does otherwise.

Yeah - and I don't for a second doubt your findings.

I don't know much about CPUs if I'm honest, but I know a bit about the filtering and regulation stage of motherboards, and I'm struggling to rationalise it.
space heater
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CPUMotherboardGraphicsRAM
Intel 2500k 4.7GHz  Asus P8P67 Pro(B3) 2 x Club3D 280X 3GB 16GB g.skill 1600MHz C9 
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Samsung 840 Pro 256GB 4 x 2TB Barracudas in RAID10 2 x WD Blue 1TB RAID0 2 x 3TB Seagate Barracuda 
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8 x 146GB HP 10k SAS - various RAID levels RAID Controller LSI 9260-8i 512MB LiteOn IHAS124 Noctua NH-D15 
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8.1 Enterprise Acer GD245HQ (120hz) LG W2420P LG IPS231P 
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CPUCPUMotherboardRAM
Intel® Xeon® Processor E5-2630 v3 (20M Cache, 2... Intel® Xeon® Processor E5-2630 v3 (20M Cache, 2... Lenovo RD650 128GB DDR4 ECC REG 
Hard DriveHard DriveHard DriveHard Drive
720ix 12Gbps SAS RAID Controller with 1GB FBWC RAID 0 - 2 x Intel S3500 120GB SSD (deduped VHD... Intel 530 120GB SSD RAID 10 - 8 x Seagate 146GB 10k SAS  
OSPowerCase
Windows Hyper-V Server 2012 R2 2 x LiteION 750W 80PLUS Platinum RD650 24x2.5" chassis 
CPURAMHard DriveOS
Intel® Xeon® Processor X5650  8GB ECC 2 x 146GB SCSI RAID1 PfSense 2.2b 
Other
Intel 4 x 1GbE 
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space heater
(29 items)
 
S-HVH-01
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PfSense
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CPUMotherboardGraphicsRAM
Intel 2500k 4.7GHz  Asus P8P67 Pro(B3) 2 x Club3D 280X 3GB 16GB g.skill 1600MHz C9 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Pro 256GB 4 x 2TB Barracudas in RAID10 2 x WD Blue 1TB RAID0 2 x 3TB Seagate Barracuda 
Hard DriveHard DriveOptical DriveCooling
8 x 146GB HP 10k SAS - various RAID levels RAID Controller LSI 9260-8i 512MB LiteOn IHAS124 Noctua NH-D15 
OSMonitorMonitorMonitor
8.1 Enterprise Acer GD245HQ (120hz) LG W2420P LG IPS231P 
MonitorMonitorKeyboardPower
HP ZR24w LG 32LH3000 (w/IPS) Razer Blackwidow Antec TruePower New 750W 
CaseMouseAudioAudio
Corsair 750D Modified original G5 Asus Xonar PCIe Sennheiser HD595 
AudioAudioAudioAudio
Tannoy Mercury 5 NAD C165BEE Bowers & Wilkins 683 Cambridge Audio DACMagic+ 
CPUCPUMotherboardRAM
Intel® Xeon® Processor E5-2630 v3 (20M Cache, 2... Intel® Xeon® Processor E5-2630 v3 (20M Cache, 2... Lenovo RD650 128GB DDR4 ECC REG 
Hard DriveHard DriveHard DriveHard Drive
720ix 12Gbps SAS RAID Controller with 1GB FBWC RAID 0 - 2 x Intel S3500 120GB SSD (deduped VHD... Intel 530 120GB SSD RAID 10 - 8 x Seagate 146GB 10k SAS  
OSPowerCase
Windows Hyper-V Server 2012 R2 2 x LiteION 750W 80PLUS Platinum RD650 24x2.5" chassis 
CPURAMHard DriveOS
Intel® Xeon® Processor X5650  8GB ECC 2 x 146GB SCSI RAID1 PfSense 2.2b 
Other
Intel 4 x 1GbE 
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