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.

[HiVizMan]

Has your PC been able to do all the things you needed it to do in the manner you want it to do those things with the 4206?

If yes, and since you do not have a Ivy-E processor why do you wish to update your bios?

I honestly have no idea why your system is doing this strange behaviour and can only think that the Ivy-E bios's are not compatible with your hard ware set up.

My advice is do not fix something that is not broken. Stay at 4206 and just enjoy your system.

[Fantasy]

yah you're right i guess. I just wanted to know why is this happening. I was hoping to see if someone has the same hardware as me and see whether they have the same problem or not.

The thing is, I like to keep my PC BIOS up to date. With every new BIOS I try to either lower the voltages or increase my OC. You know, to optimize my OC as much as posible. But with the new BIOS my OC just got worse.

ooh well, I guess I will just have to stay at 4206.

Thanks 🙂

[HiVizMan]

The changes in bios for mature platforms are always there to either introduce new hardware or resolve users issues. In your case neither is applicable, and as you have seen those fixes can indeed break a working system.

Not saying that I do not find it weird that your ram refused to OC with the newer bios's I do and I will be testing on systems here to find out why that is.

[sandro_c]

Hi Fantasy,

The suggestion of HiVizMan is sacrosanct: I do not know if all my hw is the same as yours because you have not specified, but if you look at my siglature, is similar to yours, and what concerns me is not never change the BIOS, since the 4206 gives me a decent OC ... (a month by taking advantage of the low temp. environment have raised @ 4740 Mhz mem clk to 2208) proving yet stable with lower voltages for you:
Vtt-Vccsa @ 1.15 volts
DDRAM @ 1.55 volts
Also because i can not use more ... I have an air cooler!
I did not understand, however, if you have my same Corsair memory (CTM16gx3m42133C9-Dom.GT -16 Gb 4x4 CL9 1.5V) and you spin @ 2400MHz, but my limit is @ 2224). Inform me if you are the same mem. ?
thanks and ciao
sandro c.

[Fantasy]

Hi sandro C,

Yah I do have the same RAM as you do.

Here is my Full build with pictures.

I think you can push your RAM more if you increase your VCCSA and DRAM voltage. try my OC settings and see if they work for you.

May I ask what is your timings on your RAM?

[sandro_c]

Hi Fantasy,

Sure you can fantasy:
my timings are:
primary timings-9-11-10-27-1T
secondary timings -4-96-8-4-24-4-8
everything else in Auto
The Vram voltage is 1.55 volts, that is, 0.05 more than stock
The Vtt-Vccsa is 1,155 volts that is 0,055 more than the recommended one.
I dared not go further due to the risk of deterioration due to the cpu air cooling and room-temperature in summer goes beyond 34-37 ° C in my room.
I looked at all the pictures of your hardware assembly ... congratulations, it is very nice and well chosen ... even the video card similar to mine which is a Sapphire 6979 ... authentic in your place with your cooling dare at least one OC @ 4800 Mhz!
And some notice about your Hdd or SSD?
greetings and welcome in this forum!
sandro c.

[Fantasy]

thank you 🙂

This is a full list of my PC specs. I will add them to my signature today.

MB : Asus Rampage Extreme IV - Bios 4206
CPU : i7-3930K @ 4500Mhz @ 1.35V.
RAM : Corsair Dominator GT 16gb (4GBX4) @ 2400Mhz @ 10-12-11-38-1 @ 1.68V.
Disks : Intel SSD 330 series 180GB + WD black 1TB 64MB cash + WD blue 500GB + WD green 500GB + Seagate Barracuda 7200.14 3TB.
Graphics card: AMD HD-6950 2GB unlocked to 6970.
PSU: Cooler Master Silent Pro Gold 1000W.
Keyboard\Mouse: Razer Blackwidow 2013 - Razer Lachesis 5600.
Case: Thermaltake Level 10 GT Black Edition.
Monitor: LG W2261 22inch 1920X1080@60Hz + Samsung S22B300 21.5inch 1920X1080@60Hz .
Operating System: Windows 7 Ultimate 64bit.

Water Cooling:
•EK-Supreme HF - EN (Nickel)
•1X EK 240 rad + 2X EK 120 rad
•EK-BAY SPIN Reservoir - Plexi
•Laing D5 Vario 12V DC Pump (MCP 655)
•16X EK-PSC Fitting 13mm - G1/4 Black
•Clear tubing 13mm

Overclock voltages:-
VTT CPU Voltage:- 1.35v
CPU VCCSA Voltage:- 1.35V
CPU PLL Voltage:- 1.8875V

[sandro_c]

Hi Fantasy,
our HW looks much more like you than I thought ... apart from the cooling of the CPU (well .... I saw where you live) but Hw aside, I envy the city where you live ... a visit Dubai is the dream of my life ... I often see your city with google-earth (for now I can not do more!) and are entranced by what I can see.
My compliments for your HW and first of all..for your city.
sandro c.

[Fantasy]

Thank you 🙂

Hope you can visit it soon 🙂