dejanh

So I was running some 4.75GHz stress testing today and got the strangest error ever...the screen loses the full color and turns either 8-bit or locks up in R or B in primary RGB color spectrum (3 colors).  It's the most weird thing.  I think that my video card may be barfing at high BCLK or something...I have no other explanation...

Thoughts?  I feel like at the moment this is the only hurdle stopping me from crossing into the mid 4.7s.

I just duplicated this. A IOH bump fixed it.

trs32505

When you run your clock at 225, are you raising your PCIE clock and upto what if you are? Are you increasing vdimm and vtt along with vtt and cpu pwm? Are you increasing qpi pll and ioh pll and a little bit on ioh vcore?

Thanks for the advice but yes, I am already manipulating all of those values.  The PCI-E I need to go past 225MHz BCLK is only 102MHz (normally I use 101MHz).  Amount of VTT and Vdimm is not directly proportional to BCLK.  That's a common misconception.  It is absolutely not necessary to crank up your VTT and Vdimm to get higher BCLKs.  These are pretty much purely related to Uncore clocks.  PWM frequency for me has absolutely no effect up to the stable(ish) BCLKs I was testing (~228MHz).  CPU PLL and IOH PLL run at 1.5V normally which is better for higher BCLK and Uncore in general.  However, I did try increasing this to no apparent effect.  Increasing QPI PLL and IOH voltage however did seem to make some difference though I did not feed enough volts it seems.  I need to do more testing come Monday or something.

All in all my video card is notoriously unreliable as is (shuts off randomly because of some power problem) so I am not expecting it to be the most reliable at high clocks...who knows...maybe I will try my ATI instead

awalleyeguy

dejanh

So I was running some 4.75GHz stress testing today and got the strangest error ever...the screen loses the full color and turns either 8-bit or locks up in R or B in primary RGB color spectrum (3 colors).  It's the most weird thing.  I think that my video card may be barfing at high BCLK or something...I have no other explanation...

Thoughts?  I feel like at the moment this is the only hurdle stopping me from crossing into the mid 4.7s.

I just duplicated this. A IOH bump fixed it.

Thanks for that observation!  As you can see in the comment above I did try IOH bump and it appeared to make some difference.  However, it looks like I need to go higher on the bump...1.25V is apparently not enough   It's very funny because up to 225MHz BCLK I can pretty much run IOH at stock 1.1V and nothing needs to be touched at all except for Vcore (VTT and Vdimm only to scale with DRAM and Uncore increases).  2MHz of BCLK later and I need >1.25V...that's messed up.  Still worth popping in my ATI just in case.

awalleyeguy

@ dejanh  I had to bring IOH to 1.225 on my 758 board the air cooled one. Perhaps a bump in NF200 voltage will help, I found on my 759 board that helped video O/C. On another note in my AMD rig with an inadequate PSU I would get a similar problem as yours when over clocking both gpu and cpu , was lack of power thing  higher wattage psu fixed it.

I already have a 1000W PSU that's decent...I doubt the draw is that high really.  I'll test out a few more things this coming week and post back

Thanks for giving me some ideas to try though

expedision

Sure would like to ask you some questions after christmas if you don't mind(money). I wonder how cold we could get them with a 800 ton Trane centrifugal chiller

 
ROFL.... well in all truth... I think some smaller units set up in a multi cascade would do better.  But I'm sure it could handle any heat load unlike the Vapochills and that new kid on the block OCZ phase unit.

overclocker333

Robbyn16

Core i7: 920 (lapped) Batch #: 3910A293
CPU clocked at: 3985.2 MHz, HT off
Voltage: 1.270
Idle temps: 38,35,39,34
Load temps: 71,68,68,66

 

Keep on pushin... your almost there!!!

yeaa with those temps im sure i can go further!! i'll mess around with it more just to see how far i can get it...but gonna leave it at 4.0 for 24/7 use..

expedision

Robby your at 3980Mhz. You must get to 4000Mhz to get in the club, so that run won't count.

okk i'll bump it up a little later on and run it again!!

What? no i7 975s here?

Core i7: 920 (lapped) Batch #: 3910A293
CPU clocked at: 4008MHz, HT off
Voltage: 1.35
Idle temps: 38,35,39,34
Load temps: 76,73,72,70

Updated clocks:


Core i7: 920 D0   Batch #:  Unsure
CPU clocked at:  4.3150
Voltage:  1.365 in bios VDroop Disabled
Idle temps:  39, 38, 39, 34
Load temps:   77, 74, 73, 69

awalleyeguy Core i7 920 BATCH# 3845B027 
CPU clocked at: 4776.0 MHz   
Voltage: 1.63 
Idle temp: 24,21,25,19 
Load temp: 92,87,87,78      Fixed my heat issue.                    

Alrighty everyone!!!! I have returned to the thread to update it and get everything straight in here again!

Been about a month now that I havent had a mobo or computer but I finally just pulled the trigger and got a classy board and am sending the LE in for the RMA...

At any rate, I have final exams this week so in my LITTLE BIT of spare time I will take a break and get the list updated little by little then post it when its all complete.

I am THRILLED to see this has gotten so far and glad to see that people are still bettering their OC's.


NOW...speaking of OC's...I thought maybe Id ask in here before anywhere else. But since I have the classy board now, I am going to bump up my hopes of being able to get the 4.4-4.5 clock that I want. BUT...I have NO IDEA what to change on this template because of all the new features on it. So if someone could post or PM me a template of 4.4 or 4.5  OC on the classy board I would appreciate it while I get caught up on the new features and updating the list. Thanks everyone. I look forward to seeing the suggestions and trying to reach my goal!


SimC

Hey Sim, will I be added?? :) I was told to come here by expedision :)

well WB!
im currently at 4ghz, but im trying to stable 4.4 :P
at least i made the club!

Hiho all. Well, I figured it was about time I tossed my hat in the ring as to say. Here you go.
 
Core i7: Xeon W3520 D0   Batch #:  3848A352
CPU clocked at:  4420mhz
Voltage:  1.3v w/o vdroop
Idle temps:  -8,-8,-8,-8 (lowest RealTemp will read on my system)
Load temps: 12,8,8,2
HT: ON
Cooling: VapoChill LightSpeed 
  
 

CKY2K

Welcome back SimC33... good luck on the exams...

You guys up top are insane Big props.... Awesome work awalleyeguy......

Thank ya CKY...I will be sending your chip back here real soon. I cleaned it off and its back in the plastic holder. Ill mail it out BY Saturday at the latest...

SimC