Unstable OC after updating BIOS from 4206 to 4802

[Fantasy]

Hello everyone,

My PC have had a stable OC for a full year now. Every time a new BIOS get released I update my RIVE and re-enter my OC settings.

However today I updated my PC from BIOS v4206 to v4802, and i re-entered my old OC settings. But my PC won't boot at all. I cleared the CMOS and kept trying new OC settings but to no use. I can overclock my CPU no problem. but whenever i try to OC my RAM my PC would not boot at all. Even the smallest RAM OC will make my PC unstable.

These are my PC specs:-
CPU:- 3930k
RAM:- Corsair Domenators GT 16GB - 4GBX4 @ 2133MHz @ 9-11-10-27 @ 1.5V

These are my OC settings that i have been running for a full year with no problems:-
**Attention:- Settings that are not mentioned are left untouched (set to Auto).

CPU:- 4500Mhz
RAM:- 2400MHz

Ai Overclock Tuner: Manual
BCLK Frequency: 100.000
Turbo Ratio: By All Cores @ 45
CPU Clock Gen Filter: Auto
Memory Frequency: 2400MHz

DRAM Timing Control:
Rampage Tweak: Mode 2.
Primary Timings:- 10-12-11-38-1.

Digi+ Power Control:-
VCore Load-Line Calibration:- High
CPU Current Capability:- 140%
CPU Power Duty Control:- Extream

VCCSA Load-Line Calibration:- Regular
VCCSA Current Capability:- 140%

CPU VTT Switching Freq:- 1.3x

DRAM-AB/CD Current Capability:- 140%
DRAM-AB/CD Power Phase Control: Extream

PCH 1.1v Switching Freq: 1.3x


CPU Voltage: 1.35V
VTT CPU Voltage:- 1.35v
CPU VCCSA Voltage:- 1.35V
DRAM Voltage (CHA, CHB & CHC, CHD): 1.68V
CPU PLL Voltage: 1.8875V


So my question is, why these OC settings are sudenly unstable with the new BIOS? am i doing something wrong? am i missing something?

BTW i have tried every BIOS after 4206 and all of them make my PC unstable with these OC settings. So basically i'm stuck at 4206.

[sandro_c]

Ok Fantasy

I hope we'll hear soon on the forum .... and maybe, why not, in Dubai
greetings

sandro c.

[Fantasy]

I just wanted to give a quick update on my overclocking.

It seems that i have been running a unnecessary high voltage on my VCSSA, VTT and PLL. I was running 1.35V on both VCSSA and VTT and 1.8875V on the PLL. However today i discovered that 1.2V is more than enough for VCSSA, VTT and 1.8V for the PLL.

I'm kinda sad becuase i have ran these OC settings for over 9 months. I feel bad for my IMC.

anyways.... I also got better tighter RAM timing. My old ram timing was 10-12-11-32-1 @ 1.68V. Now i pushed it as far as possible to 9-11-11-40 @ 1.7V.

One more thing to mention. If i set the Rampage Tweak to Mode 2 my ram becomes unstable and my video card drivers keeps crashing. however when i set it to Auto everything seems to be fine.

so final OC settings are as follow:-

BIOS Version:- 4206.

CPU:- 4500Mhz
RAM:- 2400MHz

Ai Overclock Tuner: Manual
BCLK Frequency: 100.000
Turbo Ratio: By All Cores @ 45
CPU Clock Gen Filter: 20Uf
Memory Frequency: 2400MHz

DRAM Timing Control:
Rampage Tweak: Auto.
Primary Timings:- 9-11-11-40-1.

Digi+ Power Control:-
VCore Load-Line Calibration:- High
CPU Current Capability:- 140%
CPU Power Duty Control:- Extream

VCCSA Load-Line Calibration:- Regular
VCCSA Current Capability:- 140%

CPU VTT Switching Freq:- 1.3x

DRAM-AB/CD Current Capability:- 140%
DRAM-AB/CD Power Phase Control: Extream

PCH 1.1v Switching Freq: 1.3x


CPU Voltage: 1.36V
VTT CPU Voltage:- 1.20v
CPU VCCSA Voltage:- 1.20V
DRAM Voltage (CHA, CHB & CHC, CHD): 1.70V
CPU PLL Voltage: 1.80V

[sandro_c]

Hello Fantasy, to you and ... your Dubai city,
some like I told, your VTT and VCCSA was excessive, I use 1.15 volts ... and someone on the forum said that they are still excessive!
But I do not think your IMC has been damaged because otherwise you would not be @ 2400 Mhz Ram ... I tried your timings hoping to go that far, but arrived @ 2240 does not want to go over ... so the your BMI and your Ram are in good health.
The Vcore to 1.36 volts for the 4500 it seems to me good, the PLL is 1.8 volts as I do, the Dram volts to 1.7 ... because my memories not offer more, I left 1.55 volts. and the decision to leave the Bios to 4206 it seems to me wise.
Before I met you I thought I had some good Corsair ... but they are nothing compared to yours!
A big hello
sandro c.

[Fantasy]

Hello sandro c,

hope your doing well.

I believe that you are using the BCLK to change your frequency. why don't you try only using the Turbo Ratio without changing the BCLK? that might work.

because if i remember correctly, I used to OC my CPU using BCLK too, however someone told me that might be a bad idea. so i just started to change the Turbo Ratio without touching the BCLK. and I believe my RAM would not OC more than 2133 if i try using BCLK. i'm not sure though. Its been almost 10 months since i got my PC stable 🙂

Its worth a try anyways 🙂

good luck.

[sandro_c]

Hello Fantasy
... may be a good idea that I never put into practice, but now as soon as possible I'll try and let you know timings 10-12-11-38-1 VDRAM BClock @ 100 and 1.65 volts vdram and multi-45X ..if ok .. then at 46X.


Yes, I did the test and I found that with slow timings, volts Dram @ 1,60 V @ 105 BClock x44 multi-X45 are not able to pass 2260 Mhz Dram max. If i use BClock @ 100 and Ram @ 2400 does not make the boot the PC and to test Ram freq. intermediate clk, leaving the BClock 100 ... I do not know how you can do.
However, I verified that the PC has a superior performance in Gflops with BClock at 100-101 and 4600-4646 CPU freq @ and multi 46X, which BClock with a 105 @ 4650 CPU and multi-45X.


See you soon.
sandro c

[FireRx]

Beautiful Rig, Fantasy:cool:

[WillyK]

Fantasy wrote:

... So my question is, why these OC settings are sudenly unstable with the new BIOS? am i doing something wrong? am i missing something?

BTW i have tried every BIOS after 4206 and all of them make my PC unstable with these OC settings. So basically i'm stuck at 4206.

I have a SB-based R4E rig and have experienced OC instability too with the BIOS upgrades after version 4206. I guess the recent BIOS updates are targeting IB rather than SB as it was mentioned before in this thread.

So I recently rolled back to BIOS 4206 and guess what happened... Windows and Office detected a HW change and requested new activation! Anyone experienced that?

It seems that BIOS 4206 vs newer BIOS versions are apparently presenting the basic HW (MB) differently towards the OS! How come? Can anyone explain that? (Naturally, the rig HW is exactly the same - only the BIOS was rolled back). This also indicates that there are some major differences between BIOS 4206 and later versions, or what do you think? I've never experienced anything like that before (but I haven't downgraded BIOS before neither - this is the first time). Comments?

[HalloweenWeed]

sandro c wrote:
Hello Fantasy
... may be a good idea that I never put into practice, but now as soon as possible I'll try and let you know timings 10-12-11-38-1 VDRAM BClock @ 100 and 1.65 volts vdram and multi-45X ..if ok .. then at 46X.
sandro c

BTW sandro, after having a BSOD 101 after running at 46 for ~5mos. I dropped to 44, auto Vcore (summer high temperatures were coming anyway). Haven't had a BSOD since (over 6 mos.). FYI (For your information, if you are interested). Just thought you might like to know, after our discussions a year ago.

[sandro_c]

Hello HalloweenWeed,

I'd like to find out if the limit of my DDR @ 2260 max, which are identical to those of Fantasy @ 2400, is due to the IMC of the processor or the memory itself.
Is there any specific test that can indicate the origin of the cause of this limit?
It 's just a curiosity ... as well as the frequency and timings was added Vram even if the PC refuses to boot, and goes out, and must remove the main power to restart.
greetings
sandro c.

[HalloweenWeed]

Sandro: Try CPU Clock gen filter: 20uf
What is your Dram V?
CPU VTT?
VCCSA?
Is 2nd VTTCPU set to auto?
CPU PLL?
Is VTTDDR voltage set to auto?
If any are "auto" please report the current reading (shown in BIOS or other utility), except for VTTDDR and 2nd VTTCPU.