Originally Posted by Modest Mouse
@ Luckyplumule...Warning: Spoiler! (Click to show)
I would have to say that enabling PLL overvoltage is pretty inevitable for any clock over 4.5GHz. Durden is correct that it will raise your CPU temps noticeably as it (if I have this incorrect please let me know) keeps the voltage at a constant feed rather than just providing it when needed to enable "turbo" mode. This is over say having a "multiplier" overclock with C1-C6 & EIST enabled which throttles down the voltage and processor speeds in order to save power consumption and prolong life of the components. Durden is again correct that all chips are most definately different
. I was able to achieve 4.8GHz on a multiplier overclcock while leaving all the power states at auto which seems to be the exception rather than the rule. I have since pushed my chip to 5.1GHz with very little tweaking. I'm most likely going to shoot for some higher clocks this weekend
Your temperature range is a bit on the high side for 4.6GHz in my opinion as well. Forgive me if you've already posted it but what kind of cooling method are you using? I had the Coolermaster Hyper 212+ Evo and never budged up over 72c on a Prime95 15hr run. Changing over to water cooling has dropped that down even further as I did not want to attempt 5GHz without it. I don't have a custom loop or anything it's just a Thermaltake Water 2.0 Extreme all-in-one unit but it does justice by me. Food for thought anyway. Keep us posted on the progression.
As i stated to Durden,i dont need the ppl Overvoltage,once i got to 1.425V in BIOS for 4,7Ghz its stable,it doesnt rly matter,what i set on other options,its just stable for how long i want.
As i said in prev Quote to durden, No matter the C states its ok even if I disable all or leave it auto or Enabled,no impact on stability.I got EIST function Enabled all the time.
I can set CPU Ratio on 50x and all auto will boot and hold about 20mins 90% blend test vith 1.544Vcore,but it goes BSOD 124 or 101.Most likely i got the BSOD 124.
My cooler is Corsair H100,push-pull config,dont know why,my temperatures are so high compared to others using this cooler,maybe its because the H100 is placed down at the bottom of case (NZXT Phantom) and my pipes goes around the CF 7870.
U guys think that because im running CF 7870 and using all 4DIMMS slots can cause that higher voltages needed and temperatures spikes?
If u need any screens,let me now,i rly dont understand,how can this chip boot at 1.360Vcore at 4,7Ghz,but not beeing able to at least 101BSOD at this voltage,but if im starting to get this 101BSOD (voltage on core) i need to push it so high that i get stability at 1,425BIOS(1,440Vcore CPU-Z) or even more.
I dont wonna be only negative,but link posted by Durden i have read this about 1é times,for case im rly missing something,I have read about 100 more guides,i tested to adjust adition turbo votalges too,nothing rly get me stable,I can simply say,if im on lower VCore any hard test such as Prime95 with blend test 90% RAM only for prime,that means im using 7,2GB of ram only for prime95 gets me to BSOD 124 sometimes imidietly sometimes after 15hours prime95.OCCT acts somehow the same,but its able to get me stable post more often and with lower Vcore.
For my 4,8GHZ i need Vcore about 1.472-1.504 tested this scales and all working ok.
I just think,my chip is rly bad.
Now im testing with AIDA 64 using all of my RAm:
CPu Ratio 48
PPL Overvoltage Disabled
Memory Frekvency 1600MHZ 9,9,9,27 1,65V (default values on RAM sticks)
All CPu limits eliminated
DIGI+ VRM settings are:
LLC on Ultra HIgh
VRm frekvency 350
Duty and Phase control on Extreme
CPu current Capability 100%
Cpu Vcore fixed 1.425V
RAm DDR 3 1.65V
VCCIO 1,11825 V
PPL Voltage 1,75V
CHA CTRL,CHA DATA,CHB CTRl and CHB DATA at +630V
CPU spread spectrum disabled
EIST enabled,C1 enabled, C3 and C6 Auto
my temperatures in AIDA 64 (newest extreme version got the license) are highest 81°C,testing and stressing all the harddisk,GPU,CPu,Memory.
Interesting think is,that i dont get stable in systetic tests,like Prime or OCCT,but if I use LINX program im stable even at 1,406Vcore and aida same.
So what is it,that Prime95 and OCCT are testing,that it pushes the computer to fail to state its stability?
I have read what is BSOD 124 and default state for BSOD 124 is that something is working over or under its designed speficication,I have also read,that 124BSOD on Sb can be the Vcore,VCCIO or PPL voltage,but as I said,i tested my stability like this:
Setting CPu ration,setting the digi+ options to recommended all over the whole internet and then i set ma RAm to speficication and from this point i let all Auto and try boot.
Then i set manul VCore starting with 1.320Vcore and 48multi,boot and test.
If error,i tried to incrase the VCCIO and tested all values up to 1,25V.
Same with PPL voltage trying from 1,7-1,9V.tested every values together at wanted Vcore,nothing,so i increases the Vcore by notch and did the same,took me 9weeks,still not get any results.Edited by LuckyPlumule - 5/15/13 at 7:58am