Rampage IV extreme wake from sleep.

YoungThomas · 5 Mar 2013 at 08:30

Hi 8 pack hoping you can help me.

My rig specs are in my signature.

Every morning I come back to my pc it is in such a deep sleep it won't wake up.

However, if I change all the load line calibration settings to extreme the problem goes away or if I leave the CPU at its default speed I don't have an issue.

I don't want to run my machine like this constantly as I believe LLC will limit my CPUs lifespan.

Thanks Tom

8 Pack · 5 Mar 2013 at 23:11

The RIVE struggles to wake from sleep when Overclocked and has since its introduction. Many Bios revisions and its still the same. The problem resides in the memory controller and "cold booting". Several have fixed the problem by changing RAM settings and tweaking VTT and VCCSA volts. These are the main two voltages and not Vcore for this specific problem.

I just saw your running 64gb of RAM. This is defo the problem mate. Waking from sleep with 64gb of RAM in Quad channel configuration is very hard on the IMC.

As well as the voltages mentioned above set clock gen filter to 20 uf and Clock gen full reset to enable. Also play with the CPU skew setting -2, -3 may be ideal for this.

We can also look at timings but see how this goes.

YoungThomas · 6 Mar 2013 at 09:43

Hi thanks for taking the time to come back to me and pointing me in the right direction.

I have been reading and changed a setting called high vccsa current capability to 140% and now my system is resuming from sleep.

Can you explain why this makes a difference?

Is it safe to run my machine like this 24/7?

I know 64gb of ram seems excessive but I regularly run one virtual machine with 32gb allocated to it.

Thanks Tom.

8 Pack · 6 Mar 2013 at 11:27

Its due to the memory controller cooling down during sleep and not been able to wake up from cold with the same settings it can when warm. The phenomena know as cold boot to many is very similar to the problem you are seeing here.

VCCSA current cap at 140% is safe for 24/7 operation the only thing that can lead to problems is if your running the VCCSA Voltage setting at above 1.2v for long periods with high VCCSA LLC also applied. High VTT and VCCSA have resulted in some cases in degaraded memory controllers. I must say I have never seen this myself but others have reported it.