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Ram Speed?

post #1 of 4
Thread Starter 
when my pc starts without OC the ddr speed says 400mhz.i oc the cpu to 3.12ghz my opt is in my bios is 266 320 and 400 i set it at 320mhz when i set it to 400 it wouldnt boot? i have 2gigs pc3200 V ram.i hear lots of talk abt dividers and clocks?????? should i just up the cpu more then up the ddr frequency? to 400?
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post #2 of 4
The RAM speed in your BIOS is the stock speed. It increases proportionally with your overclock. So, if you take your CPU from 2.8 to 3.12, your RAM also increases by around 11 percent. That means your DDR400 runs around DDR444. You may well need to up your vdimm (RAM voltage) and/or loosen your RAM timings. Even on value RAM, I would expect that it would be possible to achieve that size overclock without having to run a divider (the ratio of CPU clock speed to RAM clock speed).
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post #3 of 4
Thread Starter 
divider (the ratio of CPU clock speed to RAM clock speed). i dont know where that is? or where to find in bios
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P4 yorkfield Extreme qx9770 Asus striker II extreme 790i ultra ATI 4870 1gb 4gb ocz platnium 2X2GB STICKS 
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VISTA HOME PREM 64BIT hanns g 28 inch 700 watt thermatke custom 
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My System
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CPUMotherboardGraphicsRAM
P4 yorkfield Extreme qx9770 Asus striker II extreme 790i ultra ATI 4870 1gb 4gb ocz platnium 2X2GB STICKS 
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VISTA HOME PREM 64BIT hanns g 28 inch 700 watt thermatke custom 
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post #4 of 4
Your stock speed is 200 MHz or DDR400. By setting your RAM to something other than DDR400 in your BIOS, you are setting your divider. In your case, you can easily figure out the divider by using 400 : (what you set 266/320/400) which yields 3:2, 5:4, or 1:1. That's cheating a bit on the math as everything truly runs off of the external clock, but it works in this case.
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Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
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CPUMotherboardGraphicsRAM
Intel Q6600 G0 23A Asus P5K Deluxe Wifi HD 3870 2x2 GB G.Skill DDR2-800 
Hard DriveOptical DriveOSMonitor
2x250 GB Seagate RAID 0 + 320 GB Seagate Samsung SATA DVD Windows XP Pro/Vista Ultimate 64 bit Viewsonic VA2012wb 
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Saitek Eclipse Corsair HX620 Lian Li V2000b Logitech G7 
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