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Strange RAM behavior.

post #1 of 3
Thread Starter 
Sorry form my (really) bad English, this is not my strong side. But lets down to business smile.gif

I have old (but gold) Phenom II x6 1055t witch i am successfully (kind of) OC from 2.8 to 3.3 (ram multi down to 3.33 x 240 fsb) but... here is my problem. My RAM starts to behave in strange way, timings goes wrong in strange way.
Memory is Kingston DDR2 800mhz - this modules in this speed should have timing 6-6-6-18 and 24 tRC but when im set them manually after CPU OC PC crushes miserably. Then im thinking to give a shot and let them on "automatic" - system boots up, everything fine. I ran Prime (blend test) - its a pass, then memtest - another pass.
Im open cpu-z to see what timings i got from automatic and they are 5-5-5-15 20 tRC, what in the hell. On manual set much looser timing (with i got from SPD) computer not even starts.

Problem is I want to go higher with CPU but if i try to hit 3.5ghz (250 fsb x 14multi ) PC not even starts and i must reset cmos. RAM in this condition hits 832mhz and I think this tight timings killings its

My specs:
GA-MA770-UD3 2.0rev
Phenom II x6 1055t
Kingston ddr2 kvr800d2n6/4g - two of this
PSU: Corsair CX500

Any suggestion please?
Edited by gricle - 9/3/16 at 9:53am
post #2 of 3
Did you check the RAM volts, is that set properly?

When overclocking, you should cut the RAM speed by half so in your case 400MHz. Once you are done overclocking the CPU, then put your RAM speed and timings back to stock.
 
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BitoHeaven
(16 items)
 
Cigar ATX PC
(14 items)
 
CPUMotherboardGraphicsGraphics
Intel i7 4770k @ 4.5GHz Asus Maximus VI Gene Gigabyte R9 290 @ 1160MHz/1350MHz Gigabyte R9 290 @ 1160MHz/1350MHz 
RAMHard DriveHard DriveOptical Drive
G.Skill Trident X 2X8GB DDR3 2400MHz Samsung 840 PRO 256GB  Seagate Barracuda 7200.14 3TB SATA III 6Gb/s 64... Pioneer Blu-ray Burner 
CoolingOSMonitorKeyboard
Liquid Single Loop Triple Radiators Win 7 SP1 Professional x64bit  Samsung SynchMaster 24" Widescreen 1200p TFT-LC... Logitech G15 
PowerCaseMouseMouse Pad
EVGA SuperNOVA G2 1300w 80+ Gold Fully Modular  Fractal Design Arc Midi R2 Microsoft Sidewinder X5 Allsop Redmond Mouse Pad 
Audio
Cambridge Soundworks 5.1 
CPUMotherboardGraphicsRAM
Intel Core i5-3570K @ 4.6GHz ASRock Z77E-ITX mITX  Sapphire HD 7990 @ 1090MHz/1600MHz G.SKILL Ripjaws 2X4GB DDR3-1600 @ 1866MHz 
Hard DriveHard DriveOptical DriveCooling
Crucial SSD 128GB mSATA SATA III 6GB  Seagate Barracuda 7200.12 1TB SATA II 32MB 7200RPM LG DVD R/W SATA with LightScribe Corsair Cooling Hydro Series H100 
OSMonitorKeyboardPower
Win 7 Professional x64bit Samsung 52" 1080p 60Hz LCD Logitech Wireless K330 Corsair AX850 Gold Fully Modular 
CaseMouseMouse PadAudio
BitFenix Prodigy Mini-ATX Black  Logitech Wireless M215 Corsair Vengeance MM200 Yamaha RX-V681 & PSB/Polk Audio 5.1 
CPUMotherboardGraphicsRAM
AMD Athlon II X4 640 ASRock N68C-GS NVIDIA 6600GT G. Skill Ripjaws DDR3 1600MHz 
Hard DriveOptical DriveCoolingOS
WD Caviar Blue 500GB 16MB Cache 7200RPM LG Optical Drive Thermaltake Max Orb Windows 7 
MonitorKeyboardPowerCase
Viewsonic 19” Flatscreen CRT Gigabyte GK-K6800 103  Thermaltake TR2 600W Cigar Boxes 
MouseMouse Pad
Zalman ZM-M300 Corsair Vengeance MM200 
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post #3 of 3
Thread Starter 
I know that speed is half and efectivly is 800mhz. After OC Ram speed is set to 399.6 ~ 799.2mhz (240 x 3.33), stock is 200 x 4.00. And on stock timings pc don't boot. I use all timings that ram SPD have when is on stock (advenced too) when im go up with CPU. Voltage not touched smile.gif
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