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Newbie OC'ing Q6600, could use some advice.

post #1 of 10
Thread Starter 
Okay, so here goes....I never thought I'd be perusing a serious overclocking forum, let alone registering and making a post, but I guess I got bit by the overclocking bug, and I want to get as much as I can from my processor.

I'm a gamer first and foremost, and I play a lot of MMOs, which are extremely CPU dependent, moreso even than the GPU, at least from my experience. My old system was just not keeping up anymore, so I looked to upgrade, and I knew from the start I would be overclocking to some extent, even though I'd never done it before.

I went with a Q6600 G0 stepping,
TR 1FX-14 CPU cooler w/2 120mm fans,
Abix IX38 QuadGT
Xigmatek 750W power supply
Cosmos 1010 Case(backplate heatsink will not fit this case, oh well)
4GB G-Skill DDR2 1066 RAM

At first I thought I'd be happy with a modest OC 3.2 ghz, but I really wanted 3.4 ghz.

I had some problems at first reaching 3.4 ghz stable, and after doing a lot of research I found out I got pretty unlucky with my chip. My VID rating is 1.3250v, which as far as I can tell is the highest of any Q6600 G0's.

I've never really done this before, and I was extremely nervous about upping the Vcore too much, because I don't really want to damage my chip or MB. But after failing numerous times to get my system stable @ 3.4 ghz I finally upped the voltage to 1.4375 in bios, which shows as 1.45 in cpu-z, or around 1.39-1.40 under load.

I'm currently running 378 x 9, 1:1 timing, 2.1 DRAM Voltage, nothing else increased.

Right now, I've been stable running Small FFT's at this voltage for about 90 minutes, and I intend to let it go a few hours more. My temps are staying at around 61 C max.

But now that I've gotten 3.4 seemingly working okay, I really want to get more. With my cooling setup, and having a pretty good ambient temp in here, I feel that I could or *should* be able to achieve 3.6 ghz stable. I've seen numerous other people achieve this, and I'd love to be able to do it as well.

The problem is that I'm really worried about how much Vcore I should be using, as I have no experience at all in upping these settings, and I know from experience with my hardware that I need every bit of the current voltage to run stable at 3.4

I'm after a longterm, 2 yearish stable OC, not something I can just bench with and then turn it back down. 3.4 ghz is nice, but I'm just wondering how much voltage is really safe to use, if I'm planning on this computer being on around 12 hours a day, and under moderate load about 6-8 hours a day for a couple years.

I know these are lofty goals for a 1.3250 vid CPU on air cooling, but I'm eager to see if it's possible. I've heard conflicting things on how much voltage is too much, especially regarding day to day use.

Any advice or input at all, or any questions, would be greatly appreciated. I apologize in advance for any noobish errors, please point them out and I will correct them.
Quad Core G0
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.4ghz 1.45vcore Abit X38 QuadGT Geforce 8800 GTS 512 G92 4GB G-Skill 1066 DDR2 
Hard DriveOSMonitorPower
2x Seagage 250 GB in Raid-0 Vista 64 Ultimate Dell 21" CRT Xigmatek 750W 
Case
Cosmos 1010 
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Quad Core G0
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.4ghz 1.45vcore Abit X38 QuadGT Geforce 8800 GTS 512 G92 4GB G-Skill 1066 DDR2 
Hard DriveOSMonitorPower
2x Seagage 250 GB in Raid-0 Vista 64 Ultimate Dell 21" CRT Xigmatek 750W 
Case
Cosmos 1010 
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post #2 of 10
Hey Brand, welcome to OCN!

Sounds like you've done pretty well with that system, especially for your first overclock. 3.4-3.5GHz may very well be your ceiling with that CPU. I have a Q6600 with a VID of 1.2750v and it can do 3.6GHz but needs about 1.425v to do it. Pushing it past that needs a lot more voltage, so I'm going to guess if yours needs 1.4250v to do 3.4GHz it's not going to go much further without a big increase in voltage. In my opinion, the upper 1.4's is about all you should give a Q6600 on air cooling. So I'd set it to around 1.475-1.500 in the BIOS and see how much further you can push the CPU. If all you get is another xx MHz, it's probably better to just keep it at 3.4GHz and a known safe voltage of under 1.45v. If you can hit 3.5GHz or very close to it with less than 1.500v, then I think you'll be fine as far as voltage is concerned, just make sure temps stay under 70*C if you want this thing to last awhile.
White Whale
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White Whale
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250GB Samsung Evo Noctua NH-D14 Windows 7 Professional 64-bit 24" Samsung ToC T240 1920x1200 
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post #3 of 10
try to up a notch on the NB volt, and set manually memory volt too, maybe 2.1-2.2
post #4 of 10
Thread Starter 
Hey durch, thanks much for the reply.

So far temps do not seem to be an issue, I figure 61 or 62 C under load is pretty safe.

It looks like cpu-z reports my voltage usage as about 0.015 volts higher than my bios setting, and I'm getting around 0.05 Vdroop.

I guess the next step is to try and up the clock speed 10 Mhz at a time, and gradually increase the voltage to see if I can get it stable.

If it will end up doing 3.55 or 3.6 ghz with less than 1.5vcore, I guess I can be happy with that longterm, if it's stable.

I will update my progress to see how it goes, with screenshots if successful.
Quad Core G0
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.4ghz 1.45vcore Abit X38 QuadGT Geforce 8800 GTS 512 G92 4GB G-Skill 1066 DDR2 
Hard DriveOSMonitorPower
2x Seagage 250 GB in Raid-0 Vista 64 Ultimate Dell 21" CRT Xigmatek 750W 
Case
Cosmos 1010 
  hide details  
Reply
Quad Core G0
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.4ghz 1.45vcore Abit X38 QuadGT Geforce 8800 GTS 512 G92 4GB G-Skill 1066 DDR2 
Hard DriveOSMonitorPower
2x Seagage 250 GB in Raid-0 Vista 64 Ultimate Dell 21" CRT Xigmatek 750W 
Case
Cosmos 1010 
  hide details  
Reply
post #5 of 10
also you can try lower multi since your memos are 1066, can try 7 x 500 FSB to 3.5Ghz
post #6 of 10
Quote:
Originally Posted by Brand View Post
Hey durch, thanks much for the reply.

So far temps do not seem to be an issue, I figure 61 or 62 C under load is pretty safe.

It looks like cpu-z reports my voltage usage as about 0.015 volts higher than my bios setting, and I'm getting around 0.05 Vdroop.

I guess the next step is to try and up the clock speed 10 Mhz at a time, and gradually increase the voltage to see if I can get it stable.

If it will end up doing 3.55 or 3.6 ghz with less than 1.5vcore, I guess I can be happy with that longterm, if it's stable.

I will update my progress to see how it goes, with screenshots if successful.

Yea, unfortunately I don't think it's going to scale that well with voltage, but you can always try. 3.45-3.50 is probably a more realistic estimate.
White Whale
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Hard DriveCoolingOSMonitor
250GB Samsung Evo Noctua NH-D14 Windows 7 Professional 64-bit 24" Samsung ToC T240 1920x1200 
KeyboardPowerCaseMouse
Saitek Eclipse (Blue LED) 660W Seasonic Platinum SS-660XP Corsair 600T (white) OCZ Equalizer 
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XTrac Ripper 17" x 12" 
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White Whale
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7-4770K Gigabyte GA-Z87X-UD4H MSI TwinFrozrIII 7950 2x8GB Crucial Ballistix Sport XT 
Hard DriveCoolingOSMonitor
250GB Samsung Evo Noctua NH-D14 Windows 7 Professional 64-bit 24" Samsung ToC T240 1920x1200 
KeyboardPowerCaseMouse
Saitek Eclipse (Blue LED) 660W Seasonic Platinum SS-660XP Corsair 600T (white) OCZ Equalizer 
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XTrac Ripper 17" x 12" 
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post #7 of 10
Thread Starter 
Quote:
Originally Posted by androsk View Post
try to up a notch on the NB volt, and set manually memory volt too, maybe 2.1-2.2
I wanted to up the NB voltage, or at least give it a try, but I'm not sure which setting refers to the NB voltage.

The options I have in my bios for voltage control are:

CPU Core Voltage
CPU Core Voltage Offset(not sure what this is either)
DDR2 Voltage
CPU VTT Voltage
MCH 1.25V Voltage
ICH 1.05V Voltage
ICHIO 1.5v Voltage

I guess it's one of those last 3, but not sure which.
Quad Core G0
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.4ghz 1.45vcore Abit X38 QuadGT Geforce 8800 GTS 512 G92 4GB G-Skill 1066 DDR2 
Hard DriveOSMonitorPower
2x Seagage 250 GB in Raid-0 Vista 64 Ultimate Dell 21" CRT Xigmatek 750W 
Case
Cosmos 1010 
  hide details  
Reply
Quad Core G0
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.4ghz 1.45vcore Abit X38 QuadGT Geforce 8800 GTS 512 G92 4GB G-Skill 1066 DDR2 
Hard DriveOSMonitorPower
2x Seagage 250 GB in Raid-0 Vista 64 Ultimate Dell 21" CRT Xigmatek 750W 
Case
Cosmos 1010 
  hide details  
Reply
post #8 of 10
Quote:
Originally Posted by Brand View Post
I wanted to up the NB voltage, or at least give it a try, but I'm not sure which setting refers to the NB voltage.

The options I have in my bios for voltage control are:

CPU Core Voltage
CPU Core Voltage Offset(not sure what this is either) <--- Vdroop i guess
DDR2 Voltage
CPU VTT Voltage
MCH 1.25V Voltage <----- pretty sure is this one
ICH 1.05V Voltage <--- south Bridge
ICHIO 1.5v Voltage

I guess it's one of those last 3, but not sure which.
im not familiar with that mobo, but im almost sure those are
post #9 of 10
Thread Starter 
Well looks like you're right Durch, the voltage doesn't scale very well at all past this point, and I guess I'm around the limit of the chip's capabilities.

It took me 1.475 vcore to post @ 3.45ghz.

Going all the way up to 1.50 vcore, I can load windows @ 3.5ghz, but I BSOD running prime95 after about 30 seconds. My temps before I crashed were only around 63 C.

Since I'm not really comfortable trying to go higher than that, especially long term, I guess I'll just have to be happy with 3.4ghz at 1.45 volts.

Maybe next time I'll be a little luckier and get a lower VID rating, but I suppose I can't be too upset with a 1ghz overclock.
Quad Core G0
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.4ghz 1.45vcore Abit X38 QuadGT Geforce 8800 GTS 512 G92 4GB G-Skill 1066 DDR2 
Hard DriveOSMonitorPower
2x Seagage 250 GB in Raid-0 Vista 64 Ultimate Dell 21" CRT Xigmatek 750W 
Case
Cosmos 1010 
  hide details  
Reply
Quad Core G0
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 G0 @ 3.4ghz 1.45vcore Abit X38 QuadGT Geforce 8800 GTS 512 G92 4GB G-Skill 1066 DDR2 
Hard DriveOSMonitorPower
2x Seagage 250 GB in Raid-0 Vista 64 Ultimate Dell 21" CRT Xigmatek 750W 
Case
Cosmos 1010 
  hide details  
Reply
post #10 of 10
If you're already at the 60C mark, I wouldn't want to push it further. Sure, you can probably hit the 3.6 GHz, but first, make sure you get something REAL stable, 90 minutes is not what I would consider stable. Note also that depending on what you find OK, getting your computer to freeze after 24h up might be fine but for some it's not (like me).

A 1.450 vCore is pretty much what you need under air cooling. This will make sure you don't get error running prime 95.
2013 build
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2013 build
(18 items)
 
  
CPUMotherboardGraphicsGraphics
QuadCore Intel Core i7-3770K Asus Sabertooth z77 GeForce GTX 670 GeForce GTX 670 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance 32G M4-CT128M4SSD2 OCZ-VERTEX4 WDC WD2002FAEX-007BA0 
Hard DriveCoolingOSMonitor
WDC WD2002FAEX-007BA0 H60 Windows 7 x64 Samsung SyncMaster 2494SW 
MonitorKeyboardPowerCase
Samsung SyncMaster 2494SW das keyboard Corsair HX 850 Antec Nine-Hundred v2 
MouseMouse Pad
Razer DeathAdder Razer Goliathus 
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