Hi everyone. I'm a new forum user and I'm looking for some support to solve my pc problems.
My system worked well for 4 years with these specs
i5 3570k + corsair h80i z77 pro3 (bios ver. 2.10) 2x4gb g.skill sniper 1866mhz cl10 1.5v 2x4gb g.skill sniper 1600mhz cl9 1.25v vga gtx 1070 g1 (from december 2016) ssd samsung 840 basic hdd1 wd 500gb hdd2 samsung 500gb enermax modu87+gold 600w os windows 7 pro x64
Cpu was under a daily and stable OC @4500mhz with 1.2vcore ram kits (4x4gb) works well together @1866mhz 1.5v cl10-10-10-26 2T
Some weeks ago I've purchased a used i7 3770k to power up a little my system This i7 works perfectly on the seller's pc with any problems. So i've set the bios at default values and replaced my i5 with this i7,replaced thermal grease,reinstalled the h80i and start the pc. It seemed to work all right,i managed to get into the os and i leave it run for some hours.
But from here the problems begin. After reboot the pc i got black screen,no video signal,no bios,no os.
I decided to perform a clear cmos with any success,pc won't boot. I removed all the ram sticks and tried to boot with one by one but no luck,no boot. I removed the battery for some hours and reboot with no luck,no boot,no buzzer beeps,no video signal. After trying and trying i was able to boot into bios with one ram stick but some bios settings like some overclock option fields or choosing the integrated gpu,won't work. So i tried to reflash the bios with usb instant flash (same bios vers. 2.10,used a 8gb fat32 usb 2.0 pendrive) After bios succesfully flashed i can enter the os,so i turned off and try to install the other ram but no way out.
With the same pair of ram pc boot and i can enter the os but with one or two sticks of the other kit i got no boot and 3 buzzer beeps. I removed the 2nd ram pair and pc can boot so i entered the bios set the default settings and retry,but there were no more XMP profile options,i can't increase cpu multiplier over x39 (manually inserting a number over x39 turns down to x39),or choosing the integrate gpu over the pciexpress one.
I tried to manually set ram settings at 1600mhz (max value possible to select), set latencies options at 10-10-10-26 2T,save and reboot ok. I tried to reinstall the 2nd ram kit and pc can turn on and boot into bios but same issues on the overclock options (max x39 multiplier),no igpu. The bios system browser showed 4 sticks of ram installed (16gb) but in the other bios options the usable are just 8gb (changing the slots position,same result,16gb installed but only 8gb are working).
So my can works but: cpu can run at max 3900mhz with any other overclock value working 16gb ddr3 are installed but 8gb only are working (cpu-z too show 16gb but i do not kwow why 8gb only are usable) ram can run at max 1600mhz ,no way out to set xmp profiles or manually set them over 1600mhz
Searching in the internet i found a lot of z77 users with similar problems due to cpu or bios upgrade and the solving thing it's to change the bios chip.
So i purchased a brand new z77 pro3 bios chip from Germany flashed with bios 2.10 I replaced the old chip with the brand new,performed a clear cmos and reboot but nothing change,i've had to try a lot of times to set the pc to start and work but with the same issues as up.
Now i don't know other things to do to make my pc works well,I hope someone of you could help me to solve all issues.
Thanks
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