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Strange thing with i7 EE 3960X

post #1 of 8
Thread Starter 
Hi guys,

I guess this should fall under the CPU section. The problem I'm having is that I can no longer run my 16GB GeIL EVO Corsa DDR3-2400 at the factory specs. I do know that the IMC in these CPU's aren't all made equal, it's completely luck of the draw to get a CPU that lets you run memory at high frequencies. The thing is, after the initial build, I was able to install Windows/drivers/software having it set at the factory specs. But soon as I OC'ed the CPU over 4.0GHz, it no longer POSTs at anything above DDR3-2133MHz.

Here's my current settings:

Ai Overclock Tuner – Manual
BCLK Frequency – 100
CPU Strap – 100
CPU Clock Gen Filter – Enabled
Memory Frequency – 2133MHz
EPU Power Saving Mode – Disabled
DRAM Timing Control – 9-10-9-28 1T
DIGI+ Power Control
*CPU Load-Line Calibration – Set to High @ 120%
*DDR Load-Line Calibration – Set to High @ 120%
CPU Performance Settings
*CPU Ratio – 48
*Enhanced Intel SpeedStep Technology – Disabled
CPU Vcore Voltage – 1.275v
CPU VCCSA – Default
DRAM Voltage (CHA, CHB) – 1.60v
DRAM Voltage (CHC, CHD) – 1.60v
CPU PLL Voltage – 1.825v
VTTCPU Voltage – 1.345v
CPU Spread Spectrum – Disabled
PCIE Spread Spectrum – Disabled


The CPU is cooled by Corsair H100, temps are 23'c~28'c idle/ 39'c ~ 48'c load. All voltage readings are normal. I have tried raising the vCore as high 1.365v; VTT as high as 1.42v; and DDR Voltage as high as 1.695v. So far nothing works. Does anybody have the same problem? Is it really because of the IMC? Or am I missing some settings? Any suggestion is greatly appreciated~ Thank you!
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Red Rider
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post #2 of 8
Thread Starter 
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Red Rider
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Red Rider
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C2D E8600 @ 4.53GHz@1.325v | 10x453 Rampage Formula X48 HD4870x2 2GB GDDR5 @ 825/925 8GB(4x2) GeIL EVO DDR2-1088 5-5-5-15 @ 1.96v 
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WD Caviar 320GB 7200RPM 32MB Cache ASUS DVD+/-RW Corsair H100 Water-Cooling Kit Windows 7 Ultimate 64-bit 
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post #3 of 8
When running 2000Mhz on X58 platform, most CPUs needed 1.40v or more for CPU VTT. Its probably similar with the X79, id be happy with 1600Mhz, i find its of greater worth to get the CPU overclock than the Ram clock.

Im not sure the maximum safe CPU VTT on X79, so find that out first.

Try Command Rate 2T too.
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post #4 of 8
i have my ram set at 1600mhz with my 3930k, running stable.
My Current Rig.
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post #5 of 8
Thread Starter 
Quote:
Originally Posted by jasjeet View Post

When running 2000Mhz on X58 platform, most CPUs needed 1.40v or more for CPU VTT. Its probably similar with the X79, id be happy with 1600Mhz, i find its of greater worth to get the CPU overclock than the Ram clock.
Im not sure the maximum safe CPU VTT on X79, so find that out first.
Try Command Rate 2T too.

Yea...I've tried CPU VTT up to 1.42v as well as 2T CR.
Quote:
Originally Posted by -javier- View Post

i have my ram set at 1600mhz with my 3930k, running stable.

I'm now thinking about getting this exchanged for a lower speed kit. $400 RAM and I can't even run it at the factory specs....not that it's the RAM's fault... = =
Red Rider
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CPUMotherboardGraphicsRAM
C2D E8600 @ 4.53GHz@1.325v | 10x453 Rampage Formula X48 HD4870x2 2GB GDDR5 @ 825/925 8GB(4x2) GeIL EVO DDR2-1088 5-5-5-15 @ 1.96v 
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CPUMotherboardGraphicsRAM
Intel Core i7 Extreme Edition 3960X ASUS P9X79-Deluxe XFX HD 6970 2GB x2 CF GeIL EVO Corsa 16GB (4 x 4GB) PC3-19200 DDR3-24... 
Hard DriveOptical DriveCoolingOS
WD Caviar 320GB 7200RPM 32MB Cache ASUS DVD+/-RW Corsair H100 Water-Cooling Kit Windows 7 Ultimate 64-bit 
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Red Rider
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C2D E8600 @ 4.53GHz@1.325v | 10x453 Rampage Formula X48 HD4870x2 2GB GDDR5 @ 825/925 8GB(4x2) GeIL EVO DDR2-1088 5-5-5-15 @ 1.96v 
Hard DriveOptical DriveOSMonitor
VRaptor 150GBx2 + VR300GB LiteOn 16x DVD & 20x DVD+/-RW Vista Ultimate 64-bit SP1 Regza 32" 1080p LCD HDTV 1920x1080 
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Razor Destructor 
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Intel Core i7 Extreme Edition 3960X ASUS P9X79-Deluxe XFX HD 6970 2GB x2 CF GeIL EVO Corsa 16GB (4 x 4GB) PC3-19200 DDR3-24... 
Hard DriveOptical DriveCoolingOS
WD Caviar 320GB 7200RPM 32MB Cache ASUS DVD+/-RW Corsair H100 Water-Cooling Kit Windows 7 Ultimate 64-bit 
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post #6 of 8
VCCSA is the IMC voltage now, you need to increase it to 1.35v and VTT to 1.35v is you are going to run with a divder or run higher CPU frequency. higher CPU frequency=lower memory frequency, but you shodul be able to do 2400 if your CPu can at 4ghz too.
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post #7 of 8
This is a memory voltage issue... you will need more voltage to your RAM in this case.
Same thing happened to me.
Try upping the Vram and it will let you post.

Try sins first tho..
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post #8 of 8
Thread Starter 
Quote:
Originally Posted by Sin0822 View Post

VCCSA is the IMC voltage now, you need to increase it to 1.35v and VTT to 1.35v is you are going to run with a divder or run higher CPU frequency. higher CPU frequency=lower memory frequency, but you shodul be able to do 2400 if your CPu can at 4ghz too.

I can't recall on the top of my head if I touched the VCCSA or not lol... I'll check it when I get home~ VTT is currently @ 1.375v. The strangest thing is that I installed all the software part with the memory''s XMP settings with the CPU @ 3.8GHz at the time. After I overclocked the CPU to 4.2GHz, the memory would not run @ 2400MHz anymore... -__-?

Thank you for your input~!
Quote:
Originally Posted by Denim-187 View Post

This is a memory voltage issue... you will need more voltage to your RAM in this case.
Same thing happened to me.
Try upping the Vram and it will let you post.
Try sins first tho..

I have upped the DDR voltage as high as 1.71v.... =(
Red Rider
(13 items)
 
   
CPUMotherboardGraphicsRAM
C2D E8600 @ 4.53GHz@1.325v | 10x453 Rampage Formula X48 HD4870x2 2GB GDDR5 @ 825/925 8GB(4x2) GeIL EVO DDR2-1088 5-5-5-15 @ 1.96v 
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VRaptor 150GBx2 + VR300GB LiteOn 16x DVD & 20x DVD+/-RW Vista Ultimate 64-bit SP1 Regza 32" 1080p LCD HDTV 1920x1080 
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Logitech G15 Gaming Silverstone OP1000-E 80A Thermaltake Armor Extreme Logitech G5 Laser + MX Air 
Mouse Pad
Razor Destructor 
CPUMotherboardGraphicsRAM
Intel Core i7 Extreme Edition 3960X ASUS P9X79-Deluxe XFX HD 6970 2GB x2 CF GeIL EVO Corsa 16GB (4 x 4GB) PC3-19200 DDR3-24... 
Hard DriveOptical DriveCoolingOS
WD Caviar 320GB 7200RPM 32MB Cache ASUS DVD+/-RW Corsair H100 Water-Cooling Kit Windows 7 Ultimate 64-bit 
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32" TOSHIBA Regza 1080P HD LCD Thortech Thunderbolt 1000W Plus w/ iPower Meter EpicGear Medusa Hybrid Gaming Mouse Laser + Opt... EpicGear Hybrid Pad 
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Red Rider
(13 items)
 
   
CPUMotherboardGraphicsRAM
C2D E8600 @ 4.53GHz@1.325v | 10x453 Rampage Formula X48 HD4870x2 2GB GDDR5 @ 825/925 8GB(4x2) GeIL EVO DDR2-1088 5-5-5-15 @ 1.96v 
Hard DriveOptical DriveOSMonitor
VRaptor 150GBx2 + VR300GB LiteOn 16x DVD & 20x DVD+/-RW Vista Ultimate 64-bit SP1 Regza 32" 1080p LCD HDTV 1920x1080 
KeyboardPowerCaseMouse
Logitech G15 Gaming Silverstone OP1000-E 80A Thermaltake Armor Extreme Logitech G5 Laser + MX Air 
Mouse Pad
Razor Destructor 
CPUMotherboardGraphicsRAM
Intel Core i7 Extreme Edition 3960X ASUS P9X79-Deluxe XFX HD 6970 2GB x2 CF GeIL EVO Corsa 16GB (4 x 4GB) PC3-19200 DDR3-24... 
Hard DriveOptical DriveCoolingOS
WD Caviar 320GB 7200RPM 32MB Cache ASUS DVD+/-RW Corsair H100 Water-Cooling Kit Windows 7 Ultimate 64-bit 
MonitorPowerMouseMouse Pad
32" TOSHIBA Regza 1080P HD LCD Thortech Thunderbolt 1000W Plus w/ iPower Meter EpicGear Medusa Hybrid Gaming Mouse Laser + Opt... EpicGear Hybrid Pad 
  hide details  
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