At first i mannaged to OC my CPU to 3200Mhz, then i had to upgrade my 800mhz ram (did not want to overclock even a bit).
Currently i have Kingston HyperX 8500 DDR2 1066mhz (cpu-z says 6400 and not 8500??), then i mannaged to get up to 3720Mhz (465 fsb, multiplier 8) and run into a problem.
If i raise fsb for 5 one core fails in prime 95 blend test and freezes at small ftt test. if i raise it for 10 windows starts freezing when i run prime95 or when it boots.
Since there is freeze in small ftt test and just one core error in blend test, i think i have problem with cpu- is this correct?
I did not mannage to solve this with cpu or ram voltage, nor with timmings. I tried with NB voltage too- no sucess.
I have asus p5b mobo (latest bios) with voltdrop mode (just p5b, no deluxe or something),
KHX8500D2K2/4G kingston 4gb ram set (described above) 5-5-5-15, 2,25V;
e6750 cpu currently at 3729mhz with 1.45V.
Current bios settings:
dram ddr2-930mhz (one more thing that shows ram should not be a problem?)
pci clock synch. mode: 33.33
FSB termination voltage: 1.45V
NB Vcore: 1.55V
SB Vcore: 1.7V
ICH chipset voltage 1,215V
CPU: ratio settings 0.8
C1E, Max CPUID value limit, vanderpool, CPU tm, execute disable bit- all disabled
there is no function to lower multiplyer in bios, which is 6-8 for this cpu.
T2 (can not change to t1 in bios)
other functions in north bridge:
static read control: auto
initiate graphic adapter [PEG/PCI]
PEG force x1: disabled
Temps are ok: idle 20°C max load 40°C
NB have proper cooling (had problems before)
Any suggestions what should i try?
If you need any other info of my settings, please tell.
My goal is to reach 4Ghz, or at least 3,8.
Edited by pomartin - 9/8/13 at 8:25am