Originally Posted by rtessenear
I hope you guys can give me a little advice. I recently put together this board with an i7 3770K, Patriot Viper Extreme Series (PXD38G2400C11K) set to 11-11-11-30. I followed the OC guide (from this site) as a base; however I did not notice that the LN2 switch was set to Low freq (on my board). This set the multiplier to 16 and trust me it messed me up for about an hr until I realized what the issue was. The odd thing is once I set the LN2 switch to normal and posted into the bios I was able to see the correct CPU speed CPU freq and so on. I then set the XMP profile for the mem and configured the rest of the bios (raid and so on). no overclock at this point. Then I saved the settings rebooted and I got a post code 64 and then nothing, the system would not post. If I set the LN2 switch to low freq it would post. I have swapped memory, CPU's and done everything I could think of to resolve this issue. I can get the system to post with the LN2 switch set to Normal if I hit the reset button a few times, it will post; however that is not right. I have tried all the bios's from Gigabytes site as well. F5F, F5J and F5 give me the most consistent results. The strange thing is once I can post the system is very stable and can run Prime95 all day long. I can also do a very stable 4.8 Ghz overclock as well (once I get the system to post). Strange thing is I don't get the post 64 code at all with LN2 set to low freq. The system works very well in that configuration. Just runs under clocked. Any advice would be appreciated. I have the 2666 Corsair Platinum Mem on the way as well and will try that. I may have a bad motherboard. All the components currently used came out of a very stable 1366 i7 configuration, this build was just an upgrade to new cpu and chipset.
Cooling=custom built TEC cooling system (CPU stays at 8c)
Power Supply= 1300 ABS
VGA= 2X Hydro Copper 680's
VGA Power Supply= 650watt
Quick OC bios settings.
Just to clarify, this issue happens with no over clock. As soon as I flash the bios, reboot then tell the system to load optimized defaults the system hangs on Post code 64. After a few power resets it will post. then I can get into the bios and configure the rest of the settings. I have better luck (less post code 64 hangs) if I under clock the mem; however like I said with nothing configured in the bios I can still get this issue. I have also used Dom Gt 2000 men from my old 1366 build as a test (only two sticks), same issue.
Guys I have a new issue with my new Corsair Dominator Platinum 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 2666. I installed the new memory, set the mult to 24 and booted the system. When I run Prime95 I get instant failure. So I down clock the mult 1333 and run prime again, same results. I then test each stick of memory using Memstat86 for several hrs. No issue.
CPU Vcore 1.4V
CPU Mult 48
Mem set to XMP @ 24 Mult (this is using the atriot Viper Extreme Series)
Prime95 stable for 8hrs in this configuration. When I add the new mem, the system fails right away. Any ideas?