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Dual-channel kit+non dual-channel kit= bad OC?

post #1 of 4
Thread Starter 
I've upgraded my memory to 4X256MB Kingston ValueRAM DDR400 PC3200. Before upgrading, i could run my PC up to 3.30GHz, but now 3.00GHz is the max clock speed i got. FYI: from 4 installed RAM, only two is the real dual-channel kit, is that the problem?
"My Love"
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Intel 2.40C "Northwood" HT @ 3.30GHz Asus P4P800 GeCube Ati Radeon X1650 256MB DDR2 AGP Kingston KVR400X64C3 PC3200 DDR400 4X256MB 
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"My Love"
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 2.40C "Northwood" HT @ 3.30GHz Asus P4P800 GeCube Ati Radeon X1650 256MB DDR2 AGP Kingston KVR400X64C3 PC3200 DDR400 4X256MB 
Hard DriveOptical DriveOSMonitor
Seagate Barracuda SATA 160GB + 120GB Asus DVD-ROM and CD-RW Drive Windows XP Professional Edition SP2 LG 505 Studioworks 15" 
PowerCase
Simbadda 550Watt (Dual Fan) Ugly PC Case 
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post #2 of 4
try running the memory on a divider, if they are linked with the cpu, one or two of those sticks may not be able to keep up that FSB.
Minotaur
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Minotaur
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Core I5 2500K MSI P67A-GD53 2 X EVGA GTX 460 SLI G.Skill RIPJAWS 2*4Gb 1.3Ghz 
Hard DriveOptical DriveOSMonitor
WD: 2*500GB Raid0 + 2*2TB 2*DVD RW Optiarc+Samsung Windows 7 64-bit 24" ACER Widescreen HD 
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post #3 of 4
Thread Starter 
Sorry...but i don't understand what a divider is? any hints?
"My Love"
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 2.40C "Northwood" HT @ 3.30GHz Asus P4P800 GeCube Ati Radeon X1650 256MB DDR2 AGP Kingston KVR400X64C3 PC3200 DDR400 4X256MB 
Hard DriveOptical DriveOSMonitor
Seagate Barracuda SATA 160GB + 120GB Asus DVD-ROM and CD-RW Drive Windows XP Professional Edition SP2 LG 505 Studioworks 15" 
PowerCase
Simbadda 550Watt (Dual Fan) Ugly PC Case 
  hide details  
Reply
"My Love"
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel 2.40C "Northwood" HT @ 3.30GHz Asus P4P800 GeCube Ati Radeon X1650 256MB DDR2 AGP Kingston KVR400X64C3 PC3200 DDR400 4X256MB 
Hard DriveOptical DriveOSMonitor
Seagate Barracuda SATA 160GB + 120GB Asus DVD-ROM and CD-RW Drive Windows XP Professional Edition SP2 LG 505 Studioworks 15" 
PowerCase
Simbadda 550Watt (Dual Fan) Ugly PC Case 
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Reply
post #4 of 4
1. Usually, the ram FSB and the CPU fsb are linked.
2. your cpu has a multiplier of 24. at stock, the FSB is 100Mhz, so she would run at 2.4Ghz.
3. your ram is QUAD pumped, which means the DDR you have has the 100MHZ fsb by being linked, and then multiplied by 4, it runs at DDR400.
4. you just overclocked your PC to 3.30 MHZ. that means you increased your FSB to 137.5Mhz. Your ram is NOW running at 137.5*4= 550MHZ. NOT MANY DDR400 ram can do this!!!

Conclusion: when the ram is linked, the ration is 1:1 . which means 1MHZ of cpu fsb equals 1MHZ of DDR fsb.
Some motherboards have options to just UNLINK the ddr so it will jsut run on it's own fsb at 400.
Other boards you have to run a DIVIDER. THe motherboard has OPTIONS of dividers you can run linke 4:3, 5:4 etc...

Example 2: if you run a divider of 4:5. 1 MHZ of cpu FSB = 4/5 of DDR FSB which is equals to 0.8Mhz. so when you run 137.5 MZH on the cpu FSB, the ram will run at (137.5*4)/5= 110MHZ so the ddr400 will run at 110MHZ*4= 440MHZ. those four chips should be able to do this at least...

Is it more clear now ???
Minotaur
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core I5 2500K MSI P67A-GD53 2 X EVGA GTX 460 SLI G.Skill RIPJAWS 2*4Gb 1.3Ghz 
Hard DriveOptical DriveOSMonitor
WD: 2*500GB Raid0 + 2*2TB 2*DVD RW Optiarc+Samsung Windows 7 64-bit 24" ACER Widescreen HD 
KeyboardPowerCaseMouse
Microsoft Ergonomic 4000 Corsair HX620 Coolermaster HAF932 Advanced Ocz equalizer 
Mouse Pad
RatPadz GS 
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Minotaur
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core I5 2500K MSI P67A-GD53 2 X EVGA GTX 460 SLI G.Skill RIPJAWS 2*4Gb 1.3Ghz 
Hard DriveOptical DriveOSMonitor
WD: 2*500GB Raid0 + 2*2TB 2*DVD RW Optiarc+Samsung Windows 7 64-bit 24" ACER Widescreen HD 
KeyboardPowerCaseMouse
Microsoft Ergonomic 4000 Corsair HX620 Coolermaster HAF932 Advanced Ocz equalizer 
Mouse Pad
RatPadz GS 
  hide details  
Reply
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