TSC unstable due to check_tsc_sync_source failed

[KoSoVaR]

Hi all,

I've been doing some testing the past week or so with x79 boards and 2011 processors. I have 2 3970x and 1 3930k. I also have 3 ASUS Boards: Rampage IV Extreme, X79 Sabertooth, and P9X79 PRO.

When loading up any Linux kernel (I have tried 3.2, 3.5, and a few others), and doing dmesg | grep -i tsc in terminal, I get the following output:

TSC synchronization [CPU#0 -> CPU#1]:
Measured 45807324137 cycles TSC warp between CPUs, turning off TSC clock.
Marking TSC unstable due to check_tsc_sync_source failed

All X79 boards so far do this to me. I have an ASRock Extreme 11 on the way and should be here tomorrow. I'm thinking it's only the boards with 2011 support only (3820, 3930k, 3960x, 3970x), but I could be way wrong.

My Z77 Sabertooth board along with my 3770k had no issues with the TSC clocks syncing in Ubuntu.

Any ideas? Could anyone test their own x79 board and CPU with this? Basically need the outpout of

dmesg | grep -i tsc

 

[DR_Noble]

KoSoVar,

I have been working with the Rampage IV Extreme board for a few months. (I recently tried your i7 3970X overclock 5.2GHz + R4E build.)

From what I found, the tsc bug did not exist in BIOS version 1404. The next version I have used after that is 2105, and the bug is present. The bug remains through the current BIOS version of 3404. I am using 3960x and 3970x CPUs.

I am basically seeing the same output as you.

DR Noble

 

[KoSoVaR]

KoSoVar,

I have been working with the Rampage IV Extreme board for a few months. (I recently tried your i7 3970X overclock 5.2GHz + R4E build.)

From what I found, the tsc bug did not exist in BIOS version 1404. The next version I have used after that is 2105, and the bug is present. The bug remains through the current BIOS version of 3404. I am using 3960x and 3970x CPUs.

I am basically seeing the same output as you.

DR Noble

Dr,

Thanks for your input. I have the exact same results and posted over on OCN about the problem initially. After searching around, emailing ASUS, and basically trying several different motherboards I went absolutely nuts.

Here was the fix: http://www.overclock.net/t/1347771/sb-e-marking-tsc-unstable-due-to-check-tsc-sync-source-failed-xpost-intel-cpus/0_20#post_19018999

Pagannini980 had the same issue and told me to downgrade the BIOS. From this I also learned that using FlashROM you can replicate the BIOS across a few boards - so if you have an OC profile on 1404, you can dump your BIOS, then flash it to a new board (as to replicate it), and all of your settings and OC are there.

I still haven't gotten anywhere with ASUS. No response.

 

[DR_Noble]

It looks like BIOS version 3602 released 3/22/2013 finally resolves the tsc bug.

DR Noble