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Thread: Help understanding GA-EP45-UD3R BIOS settings & Core2 FSB OC principles




  1. #41
    Join Date
    Feb 2009
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    42

    Default Re: Help understanding GA-EP45-UD3R BIOS settings & Core2 FSB OC principles

    Quote Originally Posted by Outer Marker View Post
    I know this is a long shot, but I have a good feeling about this. Forget the specification of your RAM voltage. Push down, not up. Instead of setting 2.1V, set 2.000V in BIOS for DRAM voltage. This will adjust some termination and reference voltages on the RAM that I think (hope) will give you some stability.
    Interesting idea. It looks like I've got a stable 400MHz configuration going now, but I'll give undervolting the RAM a try to see if it can help running a lower tRD or possibly reach CAS 4.

    In testing I have encountered situations where I had to undervolt the MCH to get a particular FSB & strap combination to run, so I can definitely see it's worth trying.
    CPU: Q9550 @ 3.4GHz (400x8.5, 1.300V, ZeroTherm FZ120 heatsink)
    Motherboard: Gigabyte GA-EP45-UD3R PCB v1.1, BIOS F13e (modified)
    RAM: 8GB (2x2GB Corsair TWIN2X4096-8500C5D, 2x2GB OCZ 2P1066LV2G, 1.9V 4-4-4-12 @ 400MHz)
    Video: Sapphire Radeon HD7870 2GB
    Audio: SB X-Fi Platinum PCI (in PCI3)
    HD: SanDisk Extreme II 240GB SSD
    Optical: LiteOn iHAS124B DVD+/-RW
    PSU: PC Power & Cooling Silencer 750W S75QB
    Case: LianLi PC-61 USB (2x 80mm lower front intake, 80mm blowhole, 80mm rear exhaust, and 80mm exhaust in PSU)

  2. #42
    Join Date
    Feb 2009
    Posts
    42

    Smile Re: Help understanding GA-EP45-UD3R BIOS settings & Core2 FSB OC principles

    It looks like I've dialed in a good configuration now that I'm satisfied with. It's posted in my new thread here. It's BIOS F7 with 400MHz FSB (x7.5 for 3.0GHz CPU), 533MHz RAM on the 2.66D multiplier, 5-5-5-15 timings and tRD 7, and all stock voltages. It's passed 24-hr Memtest86+ v2.11, and I'll be putting it through a 24-hr prime95 blend run soon, which I fully expect it will pass.

    Thanks everyone who posted here for the help and support. I really appreciate it!
    CPU: Q9550 @ 3.4GHz (400x8.5, 1.300V, ZeroTherm FZ120 heatsink)
    Motherboard: Gigabyte GA-EP45-UD3R PCB v1.1, BIOS F13e (modified)
    RAM: 8GB (2x2GB Corsair TWIN2X4096-8500C5D, 2x2GB OCZ 2P1066LV2G, 1.9V 4-4-4-12 @ 400MHz)
    Video: Sapphire Radeon HD7870 2GB
    Audio: SB X-Fi Platinum PCI (in PCI3)
    HD: SanDisk Extreme II 240GB SSD
    Optical: LiteOn iHAS124B DVD+/-RW
    PSU: PC Power & Cooling Silencer 750W S75QB
    Case: LianLi PC-61 USB (2x 80mm lower front intake, 80mm blowhole, 80mm rear exhaust, and 80mm exhaust in PSU)

  3. #43
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
    Join Date
    Jan 2008
    Location
    PCB Island
    Posts
    25,940

    Default Re: Help understanding GA-EP45-UD3R BIOS settings & Core2 FSB OC principles

    Sounds like a good setup with solid timings and voltages, I will post in your other thread as well when I get that far. But, sounds good for sure!

    Good job man!

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