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OCZ Obsidian 1600MHz - Designed for lower FSB?

post #1 of 6
Thread Starter 
Hey,

I've had this OCZ Obsidian DDR3 1600MHz 2x2GB kit since August and used it about 2 weeks since. I've not managed to get it stable at 1600MHz on my sig rig.
http://www.ocztechnology.com/product...al_channel_kit

I've been up all night - it's 06:55 right now so I might be a little crazy, but I had an idea as to why this might be.

On the packaging and the website, it states this:
Quote:
Qualifed on Intel P55 Chipsets and Core i3, i5, i7 CPUs
Well, on the packaging and ebuyer, they didn't use the words "qualified" but "designed for". From eBuyer:
Quote:
OCZ low-voltage DDR3 kits are designed specifically for the Intel® P55 Chipset and subsequent Intel® Core™ i7, i5, and i3 (Socket 1156) processors.
That got me thinking... The iSeries all have low Base Clocks/ FSB, sub-200, right? But I'm running Socket 775, and my stock FSB is 333. To get it running at 1600, I need to have my FSB at atleast 400MHz.

Could that be the reason I can't stabilise the RAM at 1600MHz?
That said, I've got it running at 540MHz (5:6) (8-8-8-17) and it's been fine, but at 1600 hundred I'd use 400FSB so it would be 800 (2:1) - Can't tell timings, BSOD before I can get into Windows.
I'm not sure. If I recall correctly, I was able to get it stable if I used one stick at a time (both of them) but not while both were together.

Any ideas? Am I crazy, on the right tracks, or just losing it because I'm actually a little bit hungry? Mmm, Rice Krispies... I'm gonna go get some breakfast
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Echo
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post #2 of 6
i7 i5 i3 has a stronger memory controller, bet youd have to pump serious volts into the mem controller on your board to get those clocks and times
The Soldier
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post #3 of 6
Thread Starter 
I have it at 1.65v which is the rated voltage. What sort of voltages are safe to push to?
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post #4 of 6
forget DRAM voltage. give it lots of northbridge. 1.34-1.36 should do you good. youre good up to 1.4 without a fan
 
Simba
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Simba
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Gulftown Memories
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ASUS DVD R/RW SATA x24 Prolimatech Megahalems Boss Status 2x 1850rpm Scythe Gentle Typhoons 2x Sanyo Denki San Ace 9G1212H1011 
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1x Scythe Ultra Kaze 3k Windows 8 Pro Dell S2740 27 Inch IPS Das Keyboard 
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NZXT Hale90 1000W Antec P280 Steelseries Sensei Steelseries QCK Mini 
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Fiio E9 to Asus Xonar DX (headphone amp AND DAC) Sennheiser HD598 
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128GB Crucial M4 1TB Caviar Blue, 640GB Caviar Blue 2x2TB Western Digital Reds coming Prolimatech Megahalems w/ 2x San Ace H1011's pu... 
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post #5 of 6
Thread Starter 
Thanks, I'll give that a try after I've had some sleep.
Echo
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Echo
(8 items)
 
   
CPUMotherboardGraphicsRAM
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Hard DriveHard DriveCaseOther
2x Samsung 830 256GB Seagate Barracuda 3TB Silverstone Temjin TJ08-E BeQuiet E9-700w 
CPUMotherboardRAMHard Drive
Intel i3-3225 ASUS P8B75-MLX Corsair Ballistix Tactical Western Digital Red 
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post #6 of 6
Thread Starter 
I've tried 1.34, 1.36, 1.38 and 1.4v on the MCH Core with 1.66v on the DRAM Voltage. Won't post at all.
Which is odd, because with 1.6v on the DRAM, it's fine.


Right... I can't take the MCH core over 1.34v otherwise it won't post. Similarly, I can't go over 1.64v for the DRAM voltage. I've just started LinX now, but if I try to use the "All" memory option, it says that it stopped unexpectedly because there's not enough RAM.
And, first round of LinX failed.
Echo
(8 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core i5-3570K Asus Maximus V Gene Asus Radeon HD 7970 3GB Mushkin Blackline 16GB 
Hard DriveHard DriveCaseOther
2x Samsung 830 256GB Seagate Barracuda 3TB Silverstone Temjin TJ08-E BeQuiet E9-700w 
CPUMotherboardRAMHard Drive
Intel i3-3225 ASUS P8B75-MLX Corsair Ballistix Tactical Western Digital Red 
OSPowerCaseOther
Ubuntu Corsair CX500M Norco RPC-4224 LSI SAS 9207-4i4e HBA 
Other
Chenbro CK22804 24-Port SAS Expander Card 
  hide details  
Reply
Echo
(8 items)
 
   
CPUMotherboardGraphicsRAM
Intel Core i5-3570K Asus Maximus V Gene Asus Radeon HD 7970 3GB Mushkin Blackline 16GB 
Hard DriveHard DriveCaseOther
2x Samsung 830 256GB Seagate Barracuda 3TB Silverstone Temjin TJ08-E BeQuiet E9-700w 
CPUMotherboardRAMHard Drive
Intel i3-3225 ASUS P8B75-MLX Corsair Ballistix Tactical Western Digital Red 
OSPowerCaseOther
Ubuntu Corsair CX500M Norco RPC-4224 LSI SAS 9207-4i4e HBA 
Other
Chenbro CK22804 24-Port SAS Expander Card 
  hide details  
Reply
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