Originally Posted by delow
I need some help with voltages this is the i3 guide am following http://www.techreaction.net/2010/09/...e-clarkdale/3/
For this step, there is really only one voltageadjustment to play with; VTT.
Proper VTT voltage tuning is crucial for achieving high bclock stability. Default QPI/VTT is 1.15V and to reach 200MHz bclock you’ll likely need to increase this to at least 1.2V, many CPUs will require 1.3V or more. The only way to know is to follow the instructions here and find out.
This are the voltages in VTT
I want to set it to default then work my way up when it's unstable the only problem is the lowest VTT voltage in my Biostar BIOS is 1.150v is that the default mentioned above? that's my biggest problem is Biostar BIOS Voltage numbers are not the same as those mentioned in the guide so I don't know which setting above is 1.15v as it has an extra number can you help choose the right one for 1.15v
I currently have VTT on auto with a 3.6ghz OC and the motherboard gave it a voltage of 1.351v is that about normal? I would like to reach 4ghz and tweak the voltages myself rather then my motherboard
I agree with Fletcherea. I'd fill a bit your computer specs
so we know what you have, but unless you have all memory slots covered, or over 8 GB RAM, there's no need to have such high VTT voltage, as with over 8 GB RAM or with all memory slots filled you're placing more strain on the memory controller, and you need more voltage and better cooling to keep it stable.
Still, 1.35v is way too much for a 3.6 OC. Hell, i have 1.325v on my 4.16 OC, and because i have all memory slots covered and 8 GB RAM. Auto voltages are dumb, they tend to overvolt the devices. If i leave volts in auto, my mobo feeds 1.35v to vcore, 1.68v to RAM, 1.375v to VTT, when all i need is 1.285v in vcore, 1.51v in RAM and 1.325v in VTT. Just be sure to never get over 1.4v in vcore and VTT. What i did to test my clocks, i defaulted VTT at 1.35v, and tried all configurations till it got stable (4 passes of IBT). After that, i started lowering it until i got it unstable. Then, i did 100 passes of IBT (each one takes like 12-14 minutes with 8 GB RAM) and then 24 hrs of Prime, then some BOINCing. After that, i went and kept going with the RAM and multi
To overclock you need to be patient. I've spent over a week overclocking (trying different speeds, multipliers, memory clocks and voltages) and stress testing my i3 OC. And there's still one final test i want to try to deem it 100% stable, which is folding (even tho i run BOINC on all 4 threads no errors and it has passed IBT and Prime95). And i haven't even started to OC my RAM
I followed the same guide, so you should be okay overclocking it. Don't take things to the letter tho, if you can lower volts and keep it stable, by all means do so.Edited by Starbomba - 5/29/11 at 11:15am