Overclock.net › Forums › Intel › Intel CPUs › Weird voltage / problem POSTing on P5B and E8500
New Posts  All Forums:Forum Nav:

Weird voltage / problem POSTing on P5B and E8500

post #1 of 5
Thread Starter 
Hi guys,

Quick system rundown:

- P5B Deluxe mb
- 4x 1GB Mushkin HP DDR2-6400 (4-5-4-12, 2.1v)
- E8500 cpu

I have 2 strange problems.

1) I have specified manual memory timings as per my RAM's specs. If I leave mem voltage to Auto, all is fine. As soon as I enter a manual voltage (2.1v, the RAM's spec) I get a BSOD when I boot to Win with a memory faulty error. This happens with an FSB as low as 366, haven't tried at 333 yet. Seems wrong since the RAM is rated for 800 (so FSB 400) and it's barely hitting 733 and already 2.1v is causing lockups? I know lots of people have taken this RAM to over 1000 with just under 2.1v.

2) I can't seem to raise the FSB of the board beyond 375 (again I know this board can hit well over 500 easily, several people have done it). It's stable at 375 but the voltages in CPU-Z are ridiculous. 1.456 at idle and 1.432 at load! Intel rates it for 0.8500V-1.3625V. I expected to be around 1.2xxx here. Is CPU-Z full of crap? I was going to increase the voltage to stabilize the bus but I'm not sure about that since it's already supposedly exceeding specs (which it really shouldn't do on auto?) I'm running the southbridge on 4x, would that take away some stability here?

Here's my bios setup:

Any thoughts?



post #2 of 5
I wouldn't worry about leaving your RAM voltage at Auto, but make sure CPU-Z reports the voltage within spec.

Also, just set your vcore manually. I put my Quad on a P5B vanilla and it was at 1.5v at stock clock when I left vcore on Auto. I never trust auto for vcore anymore.
    
CPUMotherboardGraphicsRAM
Q9650 @ 4.3Ghz Gigabyte P45-UD3R EVGA GTX 960 SSC G.Skill Pi PC2-8800 8GB 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 460a 120GB LG SuperBlu Bluray/HD DVD drive Thermalright Archon Push/Pull corsair H75 (GPU) 
OSMonitorPowerCase
Win 8.1 64bit Panasonic 50" G25 Plasma Seasonic X650 Lian Li PC-B25F 
Mouse
Razer Mamba 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Q9650 @ 4.3Ghz Gigabyte P45-UD3R EVGA GTX 960 SSC G.Skill Pi PC2-8800 8GB 
Hard DriveOptical DriveCoolingCooling
OCZ Vertex 460a 120GB LG SuperBlu Bluray/HD DVD drive Thermalright Archon Push/Pull corsair H75 (GPU) 
OSMonitorPowerCase
Win 8.1 64bit Panasonic 50" G25 Plasma Seasonic X650 Lian Li PC-B25F 
Mouse
Razer Mamba 
  hide details  
Reply
post #3 of 5
Thread Starter 
Yes that I can try... my questions were more along the lines of why am I having so many problems as such low settings?
post #4 of 5
Verify what speed your RAM is booting to in Windows using CPUz, memory tab.

If you're going to overclock you need to take the settings off of AUTO and start setting them all manually; VCore, VTT, NB.

Also set Write recovery time to AUTO and try raising tRFC to 54.

Every week there are threads with problems overclocking with 4 sticks of DDR2 on 775 boards. My advice is always to start with 2 sticks, and that's what I'm gonna recommend to you; pull 2 and see what your machine can do.

Don't try all 4 until you see what your system can do with 2.
More Cores
(20 items)
 
 
SFF: HADRON
(10 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K @ 4.8Ghz offset ASrock X79 Extreme6/GB EVGA GTX680 FTW with EK waterblock EVGA GTX650 for PhysX 
RAMHard DriveHard DriveHard Drive
G-Skill 4x4GB DDR3 1866 8-9-9-24@1.5V Samsung 840 Pro 128GB Agility 3 240GB x2 RAID 0 WD 500GB X2 RAID 0 
CoolingCoolingCoolingCooling
XSPC Raystorm XSPC Dual Bay reservoir with Alphacool variable... Alphacool NexXxoS UT60 Full Copper Triple 120mm... EK GTX680 FTW waterblock 
OSMonitorPowerCase
Windows 7 64 bit Ultimate HP tSS-25X11LED 25" 1080p PC Power&Cooling Silentpower 910W Xigmatek Elysium 
MouseMouse PadAudioAudio
Razer Deathadder 3500 Rocketfish Creative Sound Core3D Logitech Z5300 
CPUMotherboardGraphicsRAM
960T unlocked to X6 ASUS M4A79XTD Evo Sapphire HD6870 1GB 2x2GB Ripjaws 7-8-7-24 F3-12800CL7D-4GBRM  
Hard DriveHard DriveOptical DriveCooling
Crucial M4 128GB WD 320GB HDD Lite-On DVD-RW Corsair H100 
OSPowerCase
Win 7 x64 Ultimate OCZ Stealthstream 600W HAF XB 
CPUMotherboardGraphicsRAM
3570K P8Z77-I MSI 560 Ti TF2 Samsung 20nm 
Hard DriveCoolingOSMonitor
Crucial M500 Kuhler 620 Windows 7 x64 52" Samsung LED TV 
CaseAudio
EVGA Hadron Air Denon receiver/ Polk audio 
  hide details  
Reply
More Cores
(20 items)
 
 
SFF: HADRON
(10 items)
 
CPUMotherboardGraphicsGraphics
i7 3930K @ 4.8Ghz offset ASrock X79 Extreme6/GB EVGA GTX680 FTW with EK waterblock EVGA GTX650 for PhysX 
RAMHard DriveHard DriveHard Drive
G-Skill 4x4GB DDR3 1866 8-9-9-24@1.5V Samsung 840 Pro 128GB Agility 3 240GB x2 RAID 0 WD 500GB X2 RAID 0 
CoolingCoolingCoolingCooling
XSPC Raystorm XSPC Dual Bay reservoir with Alphacool variable... Alphacool NexXxoS UT60 Full Copper Triple 120mm... EK GTX680 FTW waterblock 
OSMonitorPowerCase
Windows 7 64 bit Ultimate HP tSS-25X11LED 25" 1080p PC Power&Cooling Silentpower 910W Xigmatek Elysium 
MouseMouse PadAudioAudio
Razer Deathadder 3500 Rocketfish Creative Sound Core3D Logitech Z5300 
CPUMotherboardGraphicsRAM
960T unlocked to X6 ASUS M4A79XTD Evo Sapphire HD6870 1GB 2x2GB Ripjaws 7-8-7-24 F3-12800CL7D-4GBRM  
Hard DriveHard DriveOptical DriveCooling
Crucial M4 128GB WD 320GB HDD Lite-On DVD-RW Corsair H100 
OSPowerCase
Win 7 x64 Ultimate OCZ Stealthstream 600W HAF XB 
CPUMotherboardGraphicsRAM
3570K P8Z77-I MSI 560 Ti TF2 Samsung 20nm 
Hard DriveCoolingOSMonitor
Crucial M500 Kuhler 620 Windows 7 x64 52" Samsung LED TV 
CaseAudio
EVGA Hadron Air Denon receiver/ Polk audio 
  hide details  
Reply
post #5 of 5
Thread Starter 
CPU-Z shows 3 columns with the following voltages: 1.8, 1.8 and 2.1

Not sure how to interpret it?

edit: CORRECTIONS!

Sorry I thought you said check the voltage...

Memory is running at 750. I will try the rest as soon as I get home, thanks.
Edited by TheWulf - 3/17/11 at 10:19am
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Weird voltage / problem POSTing on P5B and E8500