MSI GD65 Z68 (G3) Quick Auto Voltage OC Guide and Reference

That's a shame, maybe load "optimised defaults" from the save menu (this will reset hard drive config to IDE as well) and test for stability to see if you have a problem at stock settings. Then if all good start again going up slowly one multiplier at a time, testing each one.
Also it might be an idea to run memtest86 on your RAM.
 
I'm testing mine at 4.5GHz now, auto voltage, seems to stick around 1.24-1.26 with a peak of 1.30 in Hardware Monitor, max temp I've seen is 73c with Intel Burn Test using 6GB of RAM, need to finish testing but looks good so far.

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I'm not sure of the reason, but it happens on all motherboards as far as I'm aware. If you want to play it safe choose the BIOS voltage as the limit, being the higher one. Or get hold of a multimeter and use the supplied voltage terminals to calibrate which reading is correct.
 
Nice write up, I've been using this board since day release in July, I've used more or less the same settings since day 1, the exception being using the multi to overclock with auto cpu voltage - Turbo Boost Disabled.

With my current Week 4 2011 - 2500K:

4.6GHz = 1.336v load (prime95), 1.36v load (IBT 2.56), 1.00v to 1.05v idle.

4.5GHz = 1.328v load (prime95, 1.352v load (IBT 2.56), 1.00v to 1.04v idle.

Quite reasonable but I cannot clock past 4.6GHz at all fully stable with any voltages upto 1.5v, I've ordered a new 2500K today, will see if I get lucky with the newer batches available.

The MSI features seem quite basic I.E. not many options in the BIOS, no Load Line Calibration and no Offset Voltage options, in it's favour it's ideal for anyone to use no matter how experianced at overclocking.

I did get an email this morning from MSI saying their doing tests as we speak regarding the Spread Spectrum = [Disabled] still showing 99.8MHz instead of 100MHz bus speed.
 
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Thanks for adding your info, it's good to have ;)
Yea the 99.8 bug is a little annoying, hopefully they will get this fixed. MSI have been releasing a quite few beta bios recently, which is nice to see the latest is n45 I think, but no fix yet.
 
My new 2500K, the strange thing about this CPU is it needs around 1.4v for even 4.6GHz, but it will do 4.9GHz at the same voltage. ;)

I can easily get into Windows at 5GHz, but IBT stable the issue is heat, I bet if I was on water cooling it would be stable no problem. :)

2500K: Batch No: L104A429
4.6GHz = 1.336v load (prime95), 1.36v load (IBT 2.56), 1.00v to 1.05v idle. (Auto or Manual CPU Voltage) (Maximum Clock stable)
4.5GHz = 1.328v load (prime95, 1.352v load (IBT 2.56), 1.00v to 1.04v idle. (Auto or Manual CPU Voltage)

2500K: Batch No: 3138A838
4.9GHz = 1.4v load (prime95), 1.42v load (IBT 2.56), 1.01v to 1.06v idle. (Auto CPU Voltage)
4.6GHz = 1.384v load (prime95), 1.408v load (IBT 2.56) 1.01v to 1.06v idle. (Auto CPU Voltage)

cpuz49ghz.jpg
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ibt49ghzreport.jpg
 
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1.4?

I thought we werent allowed to exceed 1.35? or it would melt the core and my PC would drop through the floor?

I would like to push my CPU, will 1.4 damage my CPU?

Processor - Basically we recommend customers not to exceed 1.35v to play it safe, all our bundles are set at 1.3250v or lower, any competitors offering bundles above 4.6GHz you should be enquiring as to what voltage they are using as we believe anything over 1.38v will limit CPU lifespan and anything over 1.42v will likely kill the CPU or severely limit its lifespan.
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minimadmotorman said:
Nelly what bios do you run? And what do you have in the way of power settings? I keep getting throttling on my GD65.
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Beta BIOS: 23.4B5, dated 4th Nov 2011.

Settings same as this but higher multi, you can just use your rated DRAM Voltage as well 1.5v etc, my old 2500K needed slightly higher DRAM Voltage as the Integrated Memory Controller needed abit more juice above 4.4GHz.

EIST = [Enabled]
Eup 2013 = [Disabled]
CPU Phase Control = [Intel SVID Mode]
C1E Support = [Enabled]
Intel C-State = [Disabled]

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My latest tests, before I start my prime95 run, I might be able to get 5GHz stable on manual volts, need to do more testing, think I'll be using 4.8GHz as my day to day clock.

2500K: Batch No: 3138A838
4.9GHz = 1.408 load (prime95), 1.408v load (IBT 2.56) 1.424v idle. (Manual CPU Voltage = 1.43v BIOS)
4.9GHz = 1.400v load (prime95), 1.42v load (IBT 2.56), 1.01v to 1.06v idle. (Auto CPU Voltage)
4.8GHz = 1.336v load (prime95), 1.344v load (IBT 2.56) 1.352v idle. (Manual CPU Voltage = 1.36v BIOS)
4.7GHz = 1.296v load (prime95), 1.296v load (IBT 2.56) 1.312v idle. (Manual CPU Voltage = 1.32v BIOS)
4.6GHz = 1.384v load (prime95), 1.408v load (IBT 2.56) 1.01v to 1.06v idle. (Auto CPU Voltage)
4.6GHz = 1.280v load (prime95), 1.280v load (IBT 2.56) 1.296v idle. (Manual CPU Voltage = 1.30v BIOS)

2500K: Batch No: L104A429
4.6GHz = 1.336v load (prime95), 1.36v load (IBT 2.56), 1.00v to 1.05v idle. (Auto or Manual CPU Voltage) (Maximum Clock stable)
4.5GHz = 1.328v load (prime95, 1.352v load (IBT 2.56), 1.00v to 1.04v idle. (Auto or Manual CPU Voltage)

cpuz49ghz.jpg
coretemp49ghz.jpg


ibt49ghzmax.jpg
ibt49ghzreport.jpg
 
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Nice work, I'll add some IBT volts for my 2600k, it seems to require similar to your old 2500k.

2600k batch# 3129B464
4.8 = 1.392 load (IBT) 0.968v idle (Auto CPU Voltage)
4.6 = 1.360v load (IBT) 0.968v idle (Auto CPU Voltage)
4.5 = 1.352v load (IBT) 0.968v idle (Auto CPU Voltage)

I noticed that if I use C-Step and C2 I can get slightly less idle voltage than using C1E, but I think C1E is supposed to be better for performance, is that right?

Edit; just for fun I did a quick pi run last night at x52 :D

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holymonk said:
1.4?

I thought we werent allowed to exceed 1.35? or it would melt the core and my PC would drop through the floor?

I would like to push my CPU, will 1.4 damage my CPU?
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http://www.overclockers.co.uk/showproduct.php?prodid=CP-360-IN
***OVERCLOCKING GUIDELINES***

- Do not exceed 1.425v core voltage, doing so could limit lifespan of the CPU
- Aim to keep temperatures below 70c underload if at all possible
- Do not overclock with BCLK, again doing so could limit lifespan of the CPU
- Recommended memory voltage is 1.50v, so make sure to run your memory at 1.50v, higher than 1.60v could limit lifespan of the CPU
- These recommendations come from OcUK and Intel, your warranty is un-affected but we highly recommend you adhere to the above to make sure your CPU lifespan is un-affected
- All Sandybridge CPU's worldwide should be run at the above or lower voltages, no higher!
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The above link is for the 2500K, taken from the OcUK website. :)
Tekgun said:
Nice work, I'll add some IBT volts for my 2600k, it seems to require similar to your old 2500k.

2600k batch# 3129B464
4.8 = 1.392 load (IBT) 0.968v idle (Auto CPU Voltage)
4.6 = 1.360v load (IBT) 0.968v idle (Auto CPU Voltage)
4.5 = 1.352v load (IBT) 0.968v idle (Auto CPU Voltage)
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Hi did you try 4.9GHz? also what is the VID reading at 4.8GHz? :)
 
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I can get into Windows @4.9 but as soon as apply any real load on the CPU it will Bluescreen, this is with auto voltage.

My VID @4.8 is 1.4111 when 100% IBT again that's on auto V.
 
Tekgun said:
I can get into Windows @4.9 but as soon as apply any real load on the CPU it will Bluescreen, this is with auto voltage.

My VID @4.8 is 1.4111 when 100% IBT again that's on auto V.
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Try clocking your CPU on Manual Voltage at 1.36v and lower at 4.8GHz going down untill you BSOD, I reckon you also have a very good CPU there.

We really do need offset voltage, I might jump ship to Gigabyte or Asus lol. :)
 
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