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Why Can't I get Same OC?

post #1 of 9
Thread Starter 
Hey Guys I upgraded my water loop and the temps are way better then what I originally had, however for some reason when I use the same over clock of 4.7Ghz on my i5 2500k it sporadically freezes and its not due to high temps...

My old config was a single 120mm rad thermaltake bigwater 760 plus single CPU loop, I added a dual cross-flow rad in push pull as well as a GPU waterblock to the mix and the temps are amazing on high load never over 58-60 stressing it through video editing.

I used this overclock tutorial before and am using the same settings
Overclock 4700GHZ: Youtube Video! (Click to show)

and it worked wonderfully before, now whenever I put it to 4.7Ghz it randomly freezes... again not due to temps as far as I can tell when its 4.6Ghz its stable... but it was stable before at 4.7 with higher temps!!

what changed besides my temps being better ??
Edited by darwing - 5/20/13 at 3:10pm
post #2 of 9
Do you have the newest BIOS on your motherboard?
post #3 of 9
Thread Starter 
Quote:
Originally Posted by RavageTheEarth View Post

Do you have the newest BIOS on your motherboard?

yes after I upgraded all the parts I upgraded the bios.. do you think that did it?
post #4 of 9
Quote:
Originally Posted by darwing View Post

yes after I upgraded all the parts I upgraded the bios.. do you think that did it?

Hmm no I don't think so. Try clearing the CMOS and putting in all the settings again.
post #5 of 9
How are the temps of your VRM? When you made the CPU-cooling more efficient it might have let to a highly reduced airflow over your VRM section?
post #6 of 9
Try resetting your BIOS, and manually overclocking it again to 4.7Ghz, and work on it until its stable. Try and "forget" what your previous settings were while doing this, and just overclock it.

After you've gotten it as stable as it was previously, compare voltages and other settings to see if something changed.


The comment about VRM temps is also valid; I would suggest putting a small fan or two (or a large fan) over the VRM area, they can get QUITE toasty! It boggles my mind how so many people (not saying you're one of them, OP) forget that just because you're watercooling doesn't mean you don't need excellent case airflow; in fact, usually you need even better airflow as you have to cool components that are much trickier for the air to get to, whereas with air cooling you have the CPU and GPU coolers moving so much air around that everything gets hit.
   
Z77 Bench-a-lot
(31 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K @ 4.92Ghz Asus Rampage 4 Extreme EVGA GTX670 FTW 2GB  EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 
GraphicsRAMHard DriveHard Drive
EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
Hard DriveHard DriveHard DriveHard Drive
WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingOS
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) Windows 7 Professional 64bit  
MonitorMonitorMonitorMonitor
Dell P2210Hb 21.5" 1920x1080p Viewsonic VA2012WB 20.1" LCD 1680x1050 Dell U3014 Eizo 27" 1440p 10bit RGB-LED Backlit AH-IPS Panel 
MonitorKeyboardPowerCase
55" LG HDTV (their top 2014 model) Ducky Mechanical (Browns) NZXT HALE90 850W + 8 blown-up AX1200/i's NZXT Switch 810 (White) 
MouseMouse PadAudioAudio
R.A.T.3 + MX510 My Desk GRADO RS1i Headphones Grado PS1000 Headphones 
OtherOtherOtherOther
Bitfenix Hydra Pro Fan Controller 5ch 30W/ch Bitfenix Alchemy Individually-Sleeved Extension... NZXT Individually-Sleeved Front Panel Wires (Bl... Phobya Sleeved 1x3pin-to-4x3pin Fan Splitter 
OtherOtherOther
Sleeved Wires w Paracord myself (no Heatshrink) Custom Front and Top Panels w HexxMesh *In Prog... Working on Custom Pedestal Prototype 
  hide details  
Reply
   
Z77 Bench-a-lot
(31 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K @ 4.92Ghz Asus Rampage 4 Extreme EVGA GTX670 FTW 2GB  EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 
GraphicsRAMHard DriveHard Drive
EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
Hard DriveHard DriveHard DriveHard Drive
WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingOS
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) Windows 7 Professional 64bit  
MonitorMonitorMonitorMonitor
Dell P2210Hb 21.5" 1920x1080p Viewsonic VA2012WB 20.1" LCD 1680x1050 Dell U3014 Eizo 27" 1440p 10bit RGB-LED Backlit AH-IPS Panel 
MonitorKeyboardPowerCase
55" LG HDTV (their top 2014 model) Ducky Mechanical (Browns) NZXT HALE90 850W + 8 blown-up AX1200/i's NZXT Switch 810 (White) 
MouseMouse PadAudioAudio
R.A.T.3 + MX510 My Desk GRADO RS1i Headphones Grado PS1000 Headphones 
OtherOtherOtherOther
Bitfenix Hydra Pro Fan Controller 5ch 30W/ch Bitfenix Alchemy Individually-Sleeved Extension... NZXT Individually-Sleeved Front Panel Wires (Bl... Phobya Sleeved 1x3pin-to-4x3pin Fan Splitter 
OtherOtherOther
Sleeved Wires w Paracord myself (no Heatshrink) Custom Front and Top Panels w HexxMesh *In Prog... Working on Custom Pedestal Prototype 
  hide details  
Reply
post #7 of 9
Thread Starter 
Quote:
Originally Posted by nleksan View Post

Try resetting your BIOS, and manually overclocking it again to 4.7Ghz, and work on it until its stable. Try and "forget" what your previous settings were while doing this, and just overclock it. Warning: Spoiler! (Click to show)
After you've gotten it as stable as it was previously, compare voltages and other settings to see if something changed.


The comment about VRM temps is also valid; I would suggest putting a small fan or two (or a large fan) over the VRM area, they can get QUITE toasty! It boggles my mind how so many people (not saying you're one of them, OP) forget that just because you're watercooling doesn't mean you don't need excellent case airflow; in fact, usually you need even better airflow as you have to cool components that are much trickier for the air to get to, whereas with air cooling you have the CPU and GPU coolers moving so much air around that everything gets hit
.

hmmm, this may be the issue, I did losen the VRM heat sink when I was threading a wire around it... do you know of any waterblocks for the ASUS p8z68-v/gen3 VRM's?
post #8 of 9
Chip creep and or mounting pressure from the block. Should always save your bios settings and start at stock whenever you remount your block. You might need slightly different settings to achieve the same OC.

Sent from my SGH-T889 using Tapatalk 2
post #9 of 9
I always test at stock when remounting a block; too much mounting pressure and or improper instalation may occur. Nice to rule that out before spending time with OC.

Sent from my SGH-T889 using Tapatalk 2
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