I5 750 on MSI P55 CD53 - Can't get stable OC

Hey everyone,

Just want to say thanks for all the great information on this site, I would be lost without it.

I'll just come out and say it, this will be the first computer I've tried to overclock, and as a matter of fact, when I bought this PC, I didn't even realize the i5 750 could achieve such speeds.

Which brings us to my problem...

I currently am trying to achieve a 3.6ghz CPU speed using an i5 750 on an MSI P55 CD53 board. The processor is cooled by the coolermaster heatsink 215, which does a great job keeping the temp down, however getting a stable OC seems like an insurmountable issue. It seems like every guide I read about overclocking provides values that I simply cannot modify using my current Bios. A perfect example is that MSI doesn't allow absolute values for Vcore, instead, it's relative and not in real time. I am also not seeing certain values for QPI, or PLL. I provided a link for a page that shows each page with their respective values. Ultimately, what I am asking for, is for someone to look at those screen shots, tell me what values I would need to put into my Bios, that would satisfy this benchmark :

3.6GHz:(24hrs Small FFTs test, 30hrs-2mins Large FFTs test and 14hrs-12mins Memtest86+ stable!)
Load-Line Calibration: Enabled (or Level2 for Gigabyte GA-P55A-UD5)
Vcore= 1.20V (CPU-Z idle)
QPI/Vtt/IMC= 1.14V
PCH= 1.10V
PLL= 1.80V
RAM= Specified voltage for your RAM

Here is the link for the website - http://www.bit-tech.net/hardware/cpus/2009/09/21/overclocking-intel-s-core-i5-750/6

I really appreciate anyone's help on this, you have no idea.

Thanks,
Sean.
2 answers Last reply
More about cd53 stable
  1. seanmc122 said:
    Hey everyone,

    Just want to say thanks for all the great information on this site, I would be lost without it.

    I'll just come out and say it, this will be the first computer I've tried to overclock, and as a matter of fact, when I bought this PC, I didn't even realize the i5 750 could achieve such speeds.

    Which brings us to my problem...

    I currently am trying to achieve a 3.6ghz CPU speed using an i5 750 on an MSI P55 CD53 board. The processor is cooled by the coolermaster heatsink 215, which does a great job keeping the temp down, however getting a stable OC seems like an insurmountable issue. It seems like every guide I read about overclocking provides values that I simply cannot modify using my current Bios. A perfect example is that MSI doesn't allow absolute values for Vcore, instead, it's relative and not in real time. I am also not seeing certain values for QPI, or PLL. I provided a link for a page that shows each page with their respective values. Ultimately, what I am asking for, is for someone to look at those screen shots, tell me what values I would need to put into my Bios, that would satisfy this benchmark :

    3.6GHz:(24hrs Small FFTs test, 30hrs-2mins Large FFTs test and 14hrs-12mins Memtest86+ stable!)
    Load-Line Calibration: Enabled (or Level2 for Gigabyte GA-P55A-UD5)
    Vcore= 1.20V (CPU-Z idle)
    QPI/Vtt/IMC= 1.14V
    PCH= 1.10V
    PLL= 1.80V
    RAM= Specified voltage for your RAM

    Here is the link for the website - http://www.bit-tech.net/hardware/cpus/2009/09/21/overclocking-intel-s-core-i5-750/6

    I really appreciate anyone's help on this, you have no idea.

    Thanks,
    Sean.



    Oh and here are the specs for my computer :

    SiSoftware Sandra

    Processor
    Model : Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
    Speed : 4GHz
    Cores per Processor : 4 Unit(s)
    Type : Quad-Core
    Integrated Data Cache : 2x 32kB, Synchronous, Write-Thru, 8-way, 64 byte line size, 2 threads sharing
    L2 Cache : 2x 256kB, ECC, Synchronous, ATC, 8-way, 64 byte line size, 2 threads sharing
    L3 Cache : 8MB, ECC, Synchronous, ATC, 16-way, Exclusive, 64 byte line size, 16 threads sharing

    Computer
    Mainboard : MSI P55-CD53 (MS-7586)
    BIOS : AMI (OEM) V1.1B5 08/28/2009
    Bus(es) : ISA X-Bus PCI PCIe IMB USB i2c/SMBus
    Multi-Processor (MP) Support : No
    Multi-Processor Advanced PIC (APIC) : Yes
    Total Memory : 8GB DIMM DDR3

    Chipset
    Model : MSI Core (Clarksfield/Lynnfield) DMI
    Front Side Bus Speed : 2x 3.62GHz (7.24GHz)

    Chipset
    Model : Intel Core Desktop (Lynnfield) UnCore
    Front Side Bus Speed : 2x 3.62GHz (7.24GHz)
    Total Memory : 8GB DIMM DDR3
    Channels : 2
    Memory Bus Speed : 2x 804MHz (1.6GHz)

    Memory Module(s)
    Memory Module : Micron 16JTF25664AZ-1G4F1 2GB DIMM DDR3 PC3-10700U DDR3-1334 (10-10-10-27 5-37-11-6)
    Memory Module : Kingston 9905403-173A00LF 2GB DIMM DDR3 PC3-10700U DDR3-1334 (9-9-9-25 4-34-10-5)
    Memory Module : Micron 16JTF25664AZ-1G4F1 2GB DIMM DDR3 PC3-10700U DDR3-1334 (10-10-10-27 5-37-11-6)
    Memory Module : Kingston 9905403-173A00LF 2GB DIMM DDR3 PC3-10700U DDR3-1334 (9-9-9-25 4-34-10-5)

    Video System
    Video Adapter : AMD Radeon HD 6800 Series (1120 SM5.0 950MHz, 1GB DDR5 4.2GHz 256-bit, PCIe 2.00 x16)

    Graphics Processor
    OpenCL GP Processor : AMD Radeon HD 6800 Series (1120SP 14C 950MHz, 832MB DDR5 4.2GHz 256-bit)
    Compute Shader Processor : AMD Radeon HD 6800 Series (1120SP 950MHz, 1GB DDR5 4.2GHz 256-bit)
    STREAM GP Processor : AMD Radeon HD 6800 Series (2SP 14C 950MHz, 1GB DDR5 4.2GHz 256-bit)

    Storage Devices
    WDC WD6400AAKS-55A7B0 (640.1GB, SATA300, 3.5", 7200rpm, 16MB Cache) : 596GB (D:)
    OCZ-AGILITY2 (60GB, SATA300, SSD) : 56GB (C:)
    Apple iPod 4GB (USB) : 4GB (K:)
    Generic USB SD Reader (USB) : N/A (G:)
    Generic USB CF Reader (USB) : N/A (H:)
    Generic USB xD/SM Reader (USB) : N/A (I:)
    Generic USB MS Reader (USB) : N/A (J:)
    USB Flash Memory 4GB (USB) : 4GB (F:)
    HL-DT-ST DVDRAM GH22NS50 (SATA150, DVD+-RW, CD-RW, 2MB Cache) : N/A (E:)

    Logical Storage Devices
    System Reserved : 100MB (NTFS)
    Hard Disk (C:) : 56GB (NTFS) @ OCZ-AGILITY2 (60GB, SATA300, SSD)
    Removable Drive (K:) : 4GB (FAT32) @ Apple iPod 4GB (USB)
    Removable Drive (F:) : 4GB (FAT32) @ USB Flash Memory 4GB (USB)
    Hard Disk (D:) : 596GB (NTFS) @ WDC WD6400AAKS-55A7B0 (640.1GB, SATA300, 3.5", 7200rpm, 16MB Cache)
    Removable Drive (G:) : N/A @ Generic USB SD Reader (USB)
    Removable Drive (H:) : N/A @ Generic USB CF Reader (USB)
    Removable Drive (I:) : N/A @ Generic USB xD/SM Reader (USB)
    Removable Drive (J:) : N/A @ Generic USB MS Reader (USB)
    Optical Drive (E:) : N/A @ HL-DT-ST DVDRAM GH22NS50 (SATA150, DVD+-RW, CD-RW, 2MB Cache)

    Peripherals
    LPC Hub Controller 1 : MSI P55 LPC Interface Controller
    LPC Legacy Controller 1 : T0 07-23
    Audio Device : MSI P55/PM55/3400 High Definition Audio
    Audio Codec : Realtek Semi High Definition Audio
    Audio Device : Pine Technology Radeon 68xx HDMI Audio (NI Barts)
    Audio Codec : ATI (AMD) HDMI Audio
    Serial Port(s) : 1
    Parallel Port(s) : 1
    Disk Controller : MSI P55/PM55/3400 4 port SATA IDE Controller
    Disk Controller : MSI P55/PM55/3400 2 port SATA IDE Controller
    Disk Controller : MSI JMB36X PCIE-to-SATAII/IDE RAID Controller
    USB Controller 1 : MSI P55/PM55/3400 USB2 Enhanced Host Controller
    USB Controller 2 : MSI P55/PM55/3400 USB2 Enhanced Host Controller
    SMBus/i2c Controller 1 : Intel ICH SMBus

    Network Services
    Network Adapter : Realtek PCIe GBE Family Controller (Ethernet, 100Mbps)

    Power Management
    Mains (AC) Line Status : On-Line

    Operating System
    Windows System : Microsoft Windows 7 Home 6.01.7601 (Service Pack 1)
    Platform Compliance : x64

    Windows Experience Index
    Current System : 7.3
  2. Ok so I got some information from the MSI forums, apparently it's because I had 2 different types of Ram with different timing... Doh, pulled 4gb out, and it ran perfectly.
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