Some Q6600 G0 / P5K deluxe Overclocks & Findings.

[Clunk]

Good stuff, but mines having 2.0v tomorrow That'll learn em

[supershanks]

Good stuff, but mines having 2.0v tomorrow That'll learn em

that should see you up to 5k Fire brigade on standby

[supershanks]

Core 1 just failed after 2 hrs prime, gonna have to turn the gas up i guess

[Clunk]

Ah well, not done bad so far

[supershanks]

Got my memory back today so not held back by ram

9x422 @4:5 mem =1055 vdimm = 1.475v


needs a little more tweaking not sure that more vdimm is needed. Temps are a bit high, running small fft cycle (more CPU) temps up to 60 dropping to mid 50s on large ffts. May be that my loop want cleaning.

Running atm at 1:1 just to check if it's the 4:5 strap that is stressing things.

[supershanks]

Still ending the day on a decent note
My old 24/7 clock with my e6600:-
9x400@4:5 mem = 1000 vdi,mm = 1.3625v which is exactly 0.2v lower

[Clunk]

Looks like thats the same note that I'll be ending on

Benching tomorrow...

[supershanks]

Well got there afdter last nights run

9x400@4:5 mem = 1000 vdi,mm = 1.375v 13Hr Prime


Settings used:-

JumperFree Configuration Settings
AI Overclocking: Manual
CPU Ratio Control: Manual
- Ratio CMOS Setting: 9
FSB Strap to Northbridge: Auto
FSB Frequency: 400
PCI-E Frequency: 102
DRAM Frequency: 1000MHz
DRAM Command Rate: 2T
DRAM Timing Control: Manual
CAS# Latency: 4
RAS# to CAS# Delay: 4
RAS# Precharge: 4
RAS# Activate to Precharge: 10
TWR: 3
TRFC: 30
TWTR: 3
TRRD: 3
TRTP: 8 (Could most likely go with 3 wasn't really focussed here)
DRAM Static Read Control: Dis

Transaction Booster: Auto
Boost Level: N/A
Clock Over-Charging Mode: AUTO

CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled

CPU Voltage: 1.375
CPU Voltage Reference: Auto
CPU Voltage Damper: Enabled
CPU PLL Voltage: 1.6
DRAM Voltage: 2.2
FSB Termination Voltage: 1.40v
North Bridge Voltage: 1.55v
North Bridge Voltage Reference: Auto
South Bridge Voltage: Auto

Advance CPU Settings
CPU Ratio Control: Manual
- Ratio CMOS Setting: 9
C1E Suppport: Disabaled
Max CPUID Value Limit: Disabaled
Vanderpool Technology: Disabaled
CPU TM Function: Disabaled
Execute Disable Bit: Disabaled
PECI: Disabled

Must admit i feel a bit like i've missed something. dissapointed that i came so close with 1.3625v which failed after 4 hours prime. Since i'm relatively new to the quad go, have been looking around a bit.

In particular i've beem looking at CPU Voltage Reference (set to Auto in above run) & CPU PLL Voltage (1.6 in Above) found this Asus BIOS

El<(')>Maxi
CPU Reference Voltage is the ASUS equivalent to GTL Reference Voltage, you can find a good article on that @ Tech Repository. This voltage is key in overclocking a quad-core processor.

Managed to track down 3 threads on Tech Repository
Quad Core Overclocking and GTL Reference Voltage
Adjusting [Advanced] Gunning Transceiver Logic (A/GTL+) Voltage Levels
for Increased Front Side Bus (FSB) Signaling Margins and Overclocking Have includrd this as it gives some background into CPU Reference Voltage / GTL Reference Voltage.
DFI LANParty UT P35-T2R Is a discussion about PLL etc.,

So far i've not gleaned anything , but will dig a bit deeper. might find the silver bullet , that lets me run on 1.3625v

One of the resaons i'm keen on this is shown in this database Quad Core OC Database there are alot of 3.6k as you'd expect but none at the vcore i'm at.
Don't know if mine's a later revision my CPU is FPO: L730B292

[Clunk]

Nice going..Ill bet those temps are brilliant!

[supershanks]

I was getting a bit wary about temps early this am b4 i went to bed ran blend so you got the usual switchback on temps:-
Small ffts: Higher Core temp Lower Ram Temp : CPU 57~59C Ram 41C
Large ffts: Lower Core temp Higher Ram Temp : CPU 53~55C Ram 46C

So have rechecked cooling this am and cleaned rad out (not a pretty sight hadn't dione it since i put it together in about May. see My Dirty Pics
Running better now a little cooler. have also just flashed to 0601.

Edit: Got a bit bored trying for 3.8 so decided to wind it up a bit Giving my Q6600 a run