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]

Hi Halloweenweed,

Normally i have:
Cpu clock gen ...auto
Vdram................1,575 V manual read 1,599
Cpu VTT............1,175 V manual read 1,81
CPu VCCSA.......1,50 V manual read 1,69
CPU PLL............1,8 V manual read 1,788
VTTDRR............. auto read 0,75 V

Vcore .................offset 0,065 read 0,920-1,402 v
bclock.................102
Cpu clk................1225-4648 multi 12X-46X

LLC medium 130%
it is all.

grazie
sandro c.

[HalloweenWeed]

Like I said, first Try CPU Clock gen filter: 20uf.
Then also try raise CPU PLL 1.9V.
Then also try raise CPU VTT in 0.025 steps, don't go past 1.45V.
Did you know your VTT is out of spec? It is supposed to remain within 0.3V of VCCSA!
Watch your core temps under load, they may increase a tiny bit as you increase VTT.

If this don't work, then you need to try plugging in all your timings manually, and start the process over again.

[sandro_c]

Hi Halloweenweed,

Sorry friend, I made a mistake in the transcription unworthy of a technical writing voltage without a decimal.
if I'd had for months a VCCSA @ 1.5V now I would have to buy another 3930K!

Rewrite the whole thing:

Cpu clock gen ...auto
Vdram.AB..............1,575 V manual read 1,56
Vdram.CD..............1,575 V manual read 1,59
Cpu VTT................1,175 V manual read 1,181
CPu VCCSA............1,150 V manual read 1,169
CPU PLL..................1,8 V manual read 1,788
VTTDRR...................auto read 0,75 V

Vcore .................offset 0,065 read 0,920-1,402 v
bclock.................102
Cpu clk................multi 12X-46X read 1225-4648 Mhz

Mem timings are:
primary ...manual 9-11-10-27-1T-
secondary ...auto/read 4-128-9-4-24-4-4-8
tertiary......all auto but tRWSR is manual -3
FSB:DRAM ..... 1:16

cpu LLC ..........medium
cpu Curr cap....130%
cpu Pow Duty....T probe
Vcore mos volt....7v
VCCSA LLC............High
VCCSA Curr Cap....130%
VCCSA fix freq.......350
VTT sw freq............1.3x
Dram abcd Curr Cap..130%
Dram Pow Phase.......optimiz
PCH sw freq............1,3x

ALL OTHER param....AUTO
It is all

grazie
sandro c.

[HalloweenWeed]

Like I said, first Try CPU Clock gen filter: 20uf.
Then also try raise CPU PLL 1.9V.
Then also try raise CPU VTT & VCCSA together in 0.025 steps, don't go past 1.4V W/VTT or 1.3V VCCSA.
Watch your core temps under load, they may increase a tiny bit as you increase VTT.

If this don't work, then you need to try plugging in all your timings manually, and start the process over again.
Ask me if that is the scenario, and I will help you with that.

[sandro_c]

Hi HalloweenWeed,
more evidence do more I am convinced that for my PC, 2260 Mhz on memory is an insurmountable barrier.
Leaving all the setup as described above,
I set VCCSA to 1.25 V, VTT 1.30 V, Vram to 1.625 v, Clock gen. to 20MF, starting from a multi 38X up to 46X I tried to raise the BClock to 101-102,103,104, then at 105 the blocks my PC and I have to turn off to make the Boot. The temps are still acceptable, but crashes even if it is cold, while up to 104 Bclk I can still run 10 steps of IntelBT. Mem. timings all AUTO reads- 10-12-11-28-128-2T ...all this settings have product a results of more temp 2-3C° but to...Nothings to do!
If you think of anything else let me know.
Hello
sandro c

[HalloweenWeed]

VCCSA current capability: 130%
DRAM-AB current capability: 140% or max whatever is higher
DRAM-CD current capability: 140% or max whatever is higher

[sandro_c]

VCCSA current capability: 130%
DRAM-AB current capability: up to 140% or whatever is higher
DRAM CD-current capability: 140% max or whatever is higher

Hi Halloweenweed,
Durning the tests, the VCCSA was already at 130% , dram AB-CD Curr Cap. was already 130% ... another 10% think it solves?
When I have time I also feel 140%.
Thank you and hello
sandro c.

[HalloweenWeed]

Sandro I think we can resolve this but not sure, but it would take several posts and not really appropriate to hijack this thread for it.
If the current capability increade does not help, you will need to get all the RAM timings off the RAM XMP tables from a utility such as Memory Tweaker, AIDA64, or Sandra. You should see something like this:

[HalloweenWeed]

I don't know why, but this forum will not let me edit any of my posts W/picture in them; so I cannot edit the typographical error (called a "typo" in U.S. English). This is the correction:

Sandro I think we can resolve this but not sure, but it would take several posts and not really appropriate to hijack this thread for it.
If the current capability increase does not help, you will need to get all the RAM timings off the RAM XMP tables from a utility such as Memory Tweaker, AIDA64, or Sandra. You should see something like this


Sandro has moved his/her issue here:
Strange limit of kit Corsair D GT-2133-C9, max running @2240 Mhz with each setup.