Highlander Posted June 18, 2004 Posted June 18, 2004 Right been having a play with me PC today, added a tornado in the hope of reaching 2.5ghz. However the board isnt responding to voltage AT ALL. above 1.7 in bios (1.66- 1.74, MASSIVE fluctuation) the CPU performs worse. Currently at 2.35, on 1.7v in bios and its stable to 45 mins prime, passes 01 and 03 marks fine. Any more voltage on this speed, it hangs at boot or fails after ~ 20 secs of prime. Vdimm is the same, any increase over 3 does nothing, makes things worse in fact tho this is probably due to the fact its CH5. So any ideas? Currently theres a 120mm 90 cfm fan over the northbridge and mosfets and they are relatively cool, none are sinked though. Temps are fine as well, CPU @ 40 load, case of 28. Quote Share this post Link to post Share on other sites More sharing options...
ViperJohn Posted June 19, 2004 Posted June 19, 2004 Originally posted by Highlander Right been having a play with me PC today, added a tornado in the hope of reaching 2.5ghz. However the board isnt responding to voltage AT ALL. above 1.7 in bios (1.66- 1.74, MASSIVE fluctuation) the CPU performs worse. Currently at 2.35, on 1.7v in bios and its stable to 45 mins prime, passes 01 and 03 marks fine. Any more voltage on this speed, it hangs at boot or fails after ~ 20 secs of prime. Vdimm is the same, any increase over 3 does nothing, makes things worse in fact tho this is probably due to the fact its CH5. So any ideas? Currently theres a 120mm 90 cfm fan over the northbridge and mosfets and they are relatively cool, none are sinked though. Temps are fine as well, CPU @ 40 load, case of 28. A couple of things. If you want those 2x256 OCZ EL's to run change the timings to 11,3,3,2,2 and you will find they are completely different animals. Also try the 12/18 beta and see how that one works. What are you using to meter the Vcore for stability? You can not go by the CPU voltages displayed in the Health Monitor or Bios Genie as they do bounce around even when the voltage are dead nuts stable on an O-Scope. A mass produced 5 cent thermistor inputing to a 10 cent DAC doesn't make for stable high accuracy metering!!! Viper Quote Share this post Link to post Share on other sites More sharing options...
Highlander Posted June 19, 2004 Posted June 19, 2004 OK thanks, they dont seem to like cas2 at all tho tbh, but will give some more volts and see. how mcuh of an icrease are we talking do you think? Yes its windows readings, so probably not the most accurate of readings. There must be issues with this CPU tbh, might be time to break out the old 1700 again..... Quote Share this post Link to post Share on other sites More sharing options...
elts_drac Posted June 19, 2004 Posted June 19, 2004 Most quality memory with average case cooling can take 3.1-3.3v Vdimm which is where I would recommend you run them. Quote Share this post Link to post Share on other sites More sharing options...
ViperJohn Posted June 19, 2004 Posted June 19, 2004 Originally posted by elts_drac Most quality memory with average case cooling can take 3.1-3.3v Vdimm which is where I would recommend you run them. Yeah I forgot to memtion to run at least 2.800 to 2.900 Vdimm on those OCZ El's. OCZ rates them to run 2.800 and Winbond chips love the juice! Viper Quote Share this post Link to post Share on other sites More sharing options...
Highlander Posted June 19, 2004 Posted June 19, 2004 Yup I'm running 3.0v through them atm, they are unstalbe on anything less, this voltgae is good for 240 fsb +, pitty the rest of the system doesnt seem to be.... Quote Share this post Link to post Share on other sites More sharing options...
elts_drac Posted June 19, 2004 Posted June 19, 2004 Winbond's sweet spot seems to be 3.1-3.3v Vdimm do try givin em a little more. It doesn't really matter what OCZ rates them as(other than for warranty purposes) as we all know the Winbonds will take over 3.3v, but on std cooling try upping the Vdimm some more, at least for testing purposes. Quote Share this post Link to post Share on other sites More sharing options...
Highlander Posted June 19, 2004 Posted June 19, 2004 I've run them up to 3.3v on this board, and this only results in reduced stability. The ram has a 120mm 83cfm fan blowing over it as well, never gets more than warm..... Quote Share this post Link to post Share on other sites More sharing options...
ViperJohn Posted June 19, 2004 Posted June 19, 2004 Originally posted by Highlander I've run them up to 3.3v on this board, and this only results in reduced stability. The ram has a 120mm 83cfm fan blowing over it as well, never gets more than warm..... Have you tried the sticks one at a time (SC) to see if you have a bad stick of memory? Viper Quote Share this post Link to post Share on other sites More sharing options...
Highlander Posted June 19, 2004 Posted June 19, 2004 Ram is fine, both sticks were tested by OCZ as they were RMA'd Quote Share this post Link to post Share on other sites More sharing options...
ViperJohn Posted June 19, 2004 Posted June 19, 2004 Originally posted by Highlander Ram is fine, both sticks were tested by OCZ as they were RMA'd Mmmmm...OCZ tests them to rated speeds not to what they will OC to I believe. Test em one at a time using Memtest86 tests #5 and #8. I suppose it is possible your MB has a really weak NB or maybe very poor NB HS contact but that is grasping at straws I think. Viper Quote Share this post Link to post Share on other sites More sharing options...
Highlander Posted June 20, 2004 Posted June 20, 2004 The Northy gets VERY toasty so the contact is good, and is teh major reason for the 120mm cooling. Will test them seperate, but in D/C the machine passes memtes on test 5 to ~45 mins no problems on 240 fsb, but fails prime after ~20 mins. Quote Share this post Link to post Share on other sites More sharing options...
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