Can anyone assist with Venice 3500+ OC? Stuck @ 2.5GHz

[AP0ll0UK]

Ok, from having a playing around after doing some reading I'm a little stuck.

I've currently got the system stable on 250x10 or 250x10.5 which runs through SuperPI fine and Prime95 for about an hour and 3DBenchmark 2003 comes back ok. Aquamark 3 crashes out part of the way through but I'm going to look the error message up and see what it comes back with. One thing I noticed is that when I fire up Speedfan to monitor the system temps, one of the last things it comes back with in the main screen is

Found Maxtor 6L200M0 (203.9GB)
Bad Thresholds Checksum ($3F)
Found ACPI temperature (40.0C)
End of detection

Whether that is something to worry about or not I don't know but I'm looking into it.

I've tried 250x11 but it won't boot into Windows as won't 260x10 or 270x10.

I am not sure at this stage whether I need to be looking at a lower multiplyer, a divider or upping the voltage. If it's a voltage issue then I need someone to please clarify for me what the max volts should be relating to my cpu and memory.

My CPU temps seem to vary for 35 up to about 38 when running Speedfan and one of the other temp readings which is the third one down reports about 43 when running Prime95. My Arctic

Freezer 64 is on it's way so hopefully that should help keeps things cool with some decent Thermal Compound.

I've included below my Bios info as I'm not exactly sure which bits you need I've included all of them to avoid anyone telling me to go back for something additional.

====================
Main Genie Bios Page
====================

FSB: 250
LDT/FSB: x3.0
LDT BUS: Down 16 Up 16
CPU/FSB: x10.0
PCI Express: 100mhz
Cool n Quiet: Disabled
CPU VID Startup 1.37v
-
CPU Core: 1.48v
LDT BUs: 1.30v
Chipset: 1.72v
-
CPU VID Control: 1.225v
CPU VID Special COntrol: Above VID * 123%
LDT Voltage Control: 1.30v
Chipset Control: 1.70v
DRAM Voltage Control: 2.70v

=========
DRAM Page
=========

DRAM Frequency Set 200 (DRAM/FSB:1/01)
CPC: Enabled
TCL: 2.5
TRCD: 04
TRAS: 10
TRP: 04
TRC: AUTO
TRFC: AUTO
TRRD: AUTO
TWR: AUTO
TETR: AUTO
TRWT: AUTO
TREF: AUTO
TWCL: AUTO

-
DRAM Bank Interleave: Enable
DQS Sqew Control: AUTO
DQS Sqew Value: 0
DRAM Drive Strength: Level 7
DRAM Data Drive Strength: Level 2
Max Asynch Latency: 08.0
Read Preameble: 06.0

Does anyone have any thoughts?

[Magnj]

turn up the Vcore, you can pus 1.6 with no worries. ( I think )

[The Mad Duke]

:toast: Greets, and welcome to the wonderful, confusing world of Venice overclocking. I would encourage you to read through the Venice OC discussion sticky, lots of folks around here have equiptment similar to yours. So far you are having a fairly typical experience. Your next step should be to crank up the volts on your CPU. A few lucky b :) st :) rds have gotten 2.6 or 2.7 at stock voltage, but most of us have had to raise the EMF to get more speed. Remember the highest speed AMD is selling this core at today is 2.4 GHz - you have already beaten that. The good news is that Venice is a VERY cool running core; as long as your load temps stay under 50 C you should be fine as far as stability goes. Happy overclocking! :D

[AP0ll0UK]

Thanks for the pointers. I've now upped it to 260x10 and upped the volts to 1.250v with the CPU VID Special Control on 123%. The temps seem ok but putting the voltage up and the multiplyer back to 11x tries to boot and shows the hardware table at the top of the screen but doesn't show the Verifying DMI Pool Data message and the reboots.

Tried to increase the voltage so into total it was up to 1.6 and 1.63 with 260x10, 270x10, 260x10.5 but it seems like a no go area. At the same time on bootup prior to the Windows logo appearing I was getting the message saying I need to reinstall NTOSKRNL.EXE message which is something I haven't seen for a long long time and I was wondering if I've hit the chips limit or if it the CPU or the Memory needs more volts.

Idle Temp is currently 35C and I'm going to leave Prime 95 running through the night on the Torture Test and see how it is in the morning unless anyway advises any better tests for stability.

Thanks again :D


One last thing, at what point do I need to concern with keeping my Ram cool? Now or when I up the DRAM? I've got a Zalman bracket I'm going to have a 8cm fan attached to to blow some cool air on the memory which I 'm hoping will help once the fan arrives.

[Geforce4ti4200]

you may have an older CBBLE stepping. Many of those are 3500+ and they max out around 2.5GHz. You may wanna sell that Venice and buy a LBBLE. I own a LBBLE that does 2.45GHz but its only a 3000+ but ive seen 3500+ LBBLE hit 2.6 to 2.85GHz :slobber:

[loc.o]

Get the .dll zip from the AQ3 website (http://www.aquamark3.com) to obtain a score.

[AP0ll0UK]

Nah, no such luck.

Prime 95 ran for about ten minutes and it gave an error at 260x10. I then left Prime95 running overnight and it gave me an error after 5 hours 41 minutes, this was at 250x10 @ 1.225v.

Does anyone have any suggestions as to what I can do to get it more stable or up the FSB a bit more to find some stability? Do I need to be adjusting the DRAM Voltage?


The chip is a LBBLE0516.

[AP0ll0UK]

If I start pumping up the FSB towards 280 and the Multiplyer to 10.5 and other possible combinations such as 270x10, 260x10.5 then the machine either doesn't display the Verifying DMI Pool Data message when booting or shows a message saying NTOSKENL.EXE or PCI.DLL is missing and they need to be reinstalled.

The highest I upped the voltage to was 1.64 as my CPU temp was then about 41C at Idle. Can anyone help as I think I'm missing something. I don't know if I should be leaning on the memory a bit and if it is indeed the DRAM Voltage I should be upping then what is a fairly safe amount of volts to be pushing it to? Plus I haven't got my 8cm fan in place yet for the Ram cooling and I don't think any of ther Temps on MBM refer to memory so I'm not sure how I can monitor it to make sure it doesn't fry.

[Vroom]

"this was at 250x10 @ 1.225v."
c'mon man , up the vcore, dont expect too much with 1.225v for 2.5ghz

[Rabidmoose171]

Leave the cpu voltage at 1.5 dont add any 126% or anything...

Then put a ram devider on, because i think its your ram.

[AP0ll0UK]

"this was at 250x10 @ 1.225v."
c'mon man , up the vcore, dont expect too much with 1.225v for 2.5ghz

I had the special on it as well so I tried it between 1.5 and 1.64 but it still didn't boot.

Would it be a problem with the memory considering that it's G.Skill?