Ocing my rig - where to next?

MrFixit

MrFixit

MrFixit

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Joined
7 Oct 2006
Posts
14
OK, so I have just got this rig up and am beginning to see how far I can go.

It seems not too far. I have (sort of) made 3150 MHz (450 MHz FSB, 1:1) but not (yet) 100% stable. It dropped out (crashed) after ~1 hour of dual primes (how do I include a screen shot?).

However, it just won't even POST at 470 MHz FSB or above. No beep, nothing. Power off and I get the failed overclockinhg message. Asus recovers well though (no CMOS clearing necessary - phew!).

Figures as below - any help?

Software / Firmware
Component Make/ Model Specification / Revision
BIOS American Megatrends 711
Windows XP Professional SP2

Settings
Menu Sub-Menu Setting
Main

IDE Configuration
SATA Configuration Enhanced
Configure SATA as RAID

Advanced
Jumperfree Configuration
AI Tuning Manual
CPU Frequency 450
DRAM Frequency DDR2-900 MHz
PCI Express Frequency 100 MHz
PCI Clock Synchronisation 33.33 MHz
Spread Spectrum Disabled
Memory Voltage 2.15 V
CPU Core Voltage 1.35 V
FSB Termination Voltage Auto
NB VCore Auto
SB VCore Auto
ICH Chipset Voltage Auto

CPU Configuration
Modify Ratio Support Enabled
Ratio CMOS Setting 7
C1E Support Enabled
Max CPUID Value Limit Disabled
Vanderpol Technology Enabled
CPU TM Function Enabled
Execute Bit Disable Enabled
PECI Disabled

Chipset
North Bridge Configuration
Memory Remapping Feature Disabled
Configure DRAM Timing by SPD Disabled
Memory Timing Parameters 4, 4, 4, 12, 6, 42, 10, 10, 10, 10
Static Read Control Disabled

O/C Testing
Tool Value Value
Prime 95 Torture Test x2 825 MB memory
Intel TAT (v2.05.2006.0427) CPU temp - Idle ~ 44 Deg. C Load 59 Deg. C (max)
Core Temp (v0.93) CPU temp – Idle ~ 45 Deg. C Load 62 Deg. C (max)
Asus Probe (v1.01.16) Motherboard – Idle ~36 Deg. C 43 Deg. C Load (max)
VCore - 1.288v-1.3v
Speed fan (v4.31) CPU temp– Idle ~ 45 Deg. C Load 50-57 Deg. C
Cpu-Z Core Speed ~3150MHz
 
OK, thanks for all the responses :D !

I have now got it to boot at 475 MHz with 2.25v on the memory, plus upping the voltage on the CPU to 1.5v, FSB Term to 1.45v, NB to 1.65 and SB to 1.6v. - i.e. I followed the Extreme Oveclocking Guide!

Some of these voltages may be able to come down, but the extra mem volts was critical - dropping back to 2.15v failed to boot. Less volts on the CPU was also unstable (even for just running Windows) but idle temps shot up to 50 Deg. C (TAT) - too high?

So, is it "safe" to give my Corsair 2.25v? It is rated at 4,4,4,12 timings at 2.1v, so I am overvoltng a bit (and invalidates warranty). Perhaps relaxing the timings (5,5,5,15?) might allow me to get away with less VDimm?

Also, if I need such high CPU volts just to be stable in Windows, let alone stress testing with dual Primes, and given the high idle temps, do I:

1. Reseat / lap the Zalman, or
2. Go for a watercooled rig - Swiftech?

As always, any advice / comments / hellos welcome!
 
mrfixit, did you ever come across this fault:

turn computer on, fans come on for appx 2 seconds then all of a sudden the computer is off, and then all of a sudden it comes on again and boots up.

someone said that my cpu vcore wasnt high enough?

EDIT, this only happens when the computer has been turn off at the wall and turned back on btw. if i was to do a restart everything would be fine
 
hardc0re_tid said:
mrfixit, did you ever come across this fault:

turn computer on, fans come on for appx 2 seconds then all of a sudden the computer is off, and then all of a sudden it comes on again and boots up.

someone said that my cpu vcore wasnt high enough?

EDIT, this only happens when the computer has been turn off at the wall and turned back on btw. if i was to do a restart everything would be fine
Click to expand...

Mine does this too. Don't think it's a problem though. It's been doing it since it was first built when it was all @ stock.
 
hardc0re_tid said:
turn computer on, fans come on for appx 2 seconds then all of a sudden the computer is off, and then all of a sudden it comes on again and boots up.
Click to expand...
This happens with all boards with this chipset iirc.. i dont know why exactly but mine did it out the box too.
 
it could potentially lower the life of your hard drives but i dont think anything else would be effected, just avoid turning it off at the wall or the back.. or leve it on 24/7 and FOLD :D
 
As for the "false start" boot-up, I get this when changing the FSB - higher! or the DRAM timings. I think this is an Asus "feature" for its crash free BIOS and ensure that it boots clean after a significant change in settings. Are you running BIOS 711? And SATA drives?

I don't think this is VCore problem - either it doesn't boot at all (VCore much too low) or crashes (a little too low).

BTW - there appears to be an 804 BIOS available.

P5B Deluxe Release BIOS version 0804
1. Support conroe L processor
2. Update JMicron option rom 1.06.22
3. Modify CPU fan low limit speed from 800 RPM to 600 RPM
4. Implement ASUS CGI performance with ATI 1950 graphic cards

But it is not shown consistently on the site.
 
MrFixit said:
As for the "false start" boot-up, I get this when changing the FSB - higher! or the DRAM timings. I think this is an Asus "feature" for its crash free BIOS and ensure that it boots clean after a significant change in settings. Are you running BIOS 711? And SATA drives?

I don't think this is VCore problem - either it doesn't boot at all (VCore much too low) or crashes (a little too low).

BTW - there appears to be an 804 BIOS available.

P5B Deluxe Release BIOS version 0804
1. Support conroe L processor
2. Update JMicron option rom 1.06.22
3. Modify CPU fan low limit speed from 800 RPM to 600 RPM
4. Implement ASUS CGI performance with ATI 1950 graphic cards

But it is not shown consistently on the site.
Click to expand...

yes im running SATA and i have the 0804 BIOS installed
 
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