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Trying to understand voltages for Sandybridge and programs...

GregI said:
I will disable it then and lower the voltage slightly. Having a fully stable overclock of 4.3Ghz with temps not exceeding 50c is pretty darn good for me. Will leave my Q6600 at 3ghz in the dust.
Click to expand...


That it will indeed. :D
 
Disable the turbo boost, don't leave it at auto.

sam0315w.jpg
 
I forgot to mention that you have to disable the real-time ratio changes in OS before you can access the Intel(R) Turbo Boost Tech. Then go back and able the real-time ratio change.
 
Disabled it, nothing. :(

I also tried a voltage of 1.212 and got a BSOD on Windows startup. Atleast I know the motherboard is setting correct voltages now. :P

Edit - Running a burn test with 1.248. Seems stable atm and no load temps over 49c. :)
 
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I just ran Prime95 for about 10 hours (4.3 Ghz) at like a 1.286 voltage (the vcore shown when you boot into BIOS). Does anyone think I should go lower to find the minimum stable I can or is this fine? I must be like really close to instability. Probably around 1.270 or something right would be when BSOD's would set in.
 
If it ain't broke why fix it.

That is a very good ratio of vCore to MHz just enjoy your system. :)
 
I got my PSU sorted (long story) and CPU-Z reports correct voltages now, my idle voltage is 1.260. Under load the voltage drops down to either 1.224 or 1.212....

I have Load Line Calibration disabled as recommended and Turbo Boost disabled. I also swear I saw CPU-Z report a 1.360 voltage for half a second.
 
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Voltage Read Points VS Software and BIOS and Load Line Calibration:
I took manual Digital Multi Meter readings of CPU Vcore, CPU Vcore LLC 1, CPU VCORE LLC2, QPI/VTT, and DDR3 Voltage. System Agent and CPU PLL voltages were only taken from what is set in BIOS to what I found on the board. Now I did not

Percent Difference:
Average Vcore percent difference: 0.5% difference
QPI/VTT percent average percent difference: 0.1% difference
DDR3 percent average difference: 0.6% difference
System Agent percent difference: 2%
CPU PLL percent difference: 1.5%

It looks like the Ite voltage monitoring super I/O chip is doing its job. The voltages you should be most concerned with are Vcore and VTT, and they are almost dead on (VTT is really dead on). Now this board is for enthusiasts, so I am sure many will use read points, but software is just fine. You can use the above data on Load Line Calibration to see what level you want to use, if any at all.

http://img526.imageshack.us/img526/9691/voltagetable.png
 
modez Totally concur the board does deliver remarkably stable power and your readings are totally inline with what I recorded. True I was looking at a bios setting of 1.64volts on the core. But the variation range was the same. I hope you do not mind but I have enbedded your image for others to access easily.

voltagetable.png
 
The official Gigabyte F3 BIOS only has LLC as Enabled or Disabled. I need to go Beta for Level options. Looking at that graph, having my vcore at 1.26 and load of 1.212 seems within the ballpark.

1Day, I settled on 4.1 Ghz.
 
At those volts a 4.1 GHz clock speed is pretty good for 24/7 I would think. The SB processors are just so amazingly quick. 4GHz is like 5GHz on a E8600 cpu.
 
tbh I am not impressed with the overclocking capabilities of the UD4, my 2600k which runs at 4.9ghz 24/7 in my GD65, won't run stable at 4.7ghz on the UD4, god knows why but it does seem odd. I have the B3 revision and I suspect the bios is still not mature enough
 
Liquid - two quick questions.

Do you have PLL overrider enabled on the Giga board?

and what was the best BIOS for overclocking on the GD65? I have a friend who has just picked up the MSI board and I have no clue about MSI at all.
 
Hi 1Day,

Tried with PLL overrider off for up to 48 multiplier, also tried with it on. Seems really strange to me as at 48 multiplier the board posts and attempts but it is not stable, ramping vcore seems to get me more time before unstability(still not long) but I am putting what I think is way too much juice compared to the GD65. I am also using way more juice at idle than at full prime load, which is annoying, lowering vcore to prime loaded vcore in bios results in failed boot attempts.

I also seem to be unable to do the alt+f12 to copy updated bios to the backup bios and the manual states this is not possible. Every time an overclock fails you get stuck in this ridiculous 3 times post boot lock between the 2 bioses until it finally says it's failed and allows you in lol. Hardly ideal for fine tuning, I mean come on gigabyte you are BETTER than this!

Also the ram always defaults to 1333mhz(mine is bog standard 1.5v xms 1600mhz)and other settings in the bios remain just fine.

The MSI has a really clunky looking bios but it is well featured. I am using bios v1.8. Have your mate pm me if he needs any advice, happy to help. tbh the msi, I booted up and around 10 clicks later it sat at 4.7ghz first go bang on, minus a few vcore adjustments after. The bios is solid too and rebooting after bios changes/booting is rapid. The bios options in the GD65 are way better than the UD4, like loadline is on or off on the UD4, no different levels which is very poor imo.
 
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Just to update my previous comments above, I have at long last been able to synchronise both bioses, alt+f12 is needed but it needs to be pressed and held until the process begins. No longer suffering cold boot issues now:).

However my MSI B3 replacement has arrived and this will be going on the MM soon as I love the MSi:D
 
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