post code 8

[gupsterg]

QCODE 8 means insufficient CPU power. Is your PSU good? Do you have the extra power plugged in at the top left of the motherboard? Have you changed the CPU voltage?

Q-Code: 8 can occur for a number of reasons. I have seen it occur even on a crash where CPU is sufficiently powered. I have seen it on flaky OC profile. I have seen it when RAM is having an issue. All in all it just seems an all round code for borked operation in my opinion.

I don't use the 4 pin extra because my friend told me that not really have to contact that...
Could it be because of this?

So you're saying that you have only the 8-pin power connected on the board for the CPU power? If that's so then of course you need to also connect the extra 4-pin power cable on the board! There's a reason for being there.
Connecting the 8-pin only will make your CPU power up when you power on your PC but having only one cable connected your CPU cannot draw sufficient power when it needs to. If it wasn't necessary then it wouldn't be there in the first place.

You do not need the extra 4 pin power connected, unless you are gonna use LN2 and really hammer an OC out of CPU.

I have used C6H and C7H for lengthy periods, with OC CPU/RAM on R7 1700/ R7 1800X/R7 2700X/R5 3600 and not had an issue with just using the 8 pin CPU connected. I have high load stress tests with OC CPU/RAM with only the 8 pin power plug connected.

This post (link) and this one (link) has info by The Stilt.

There is NO need to connect both of the ATX12V (4-pin) & EPS12V (8-pin) connectors.
EPS12V is the primary connector and the ATX12V pin is there simply to lower the current drawn from the EPS12V connector during extreme OC (LN2).

The EPS12V connector can safely deliver 408W+ (34A @ 12.00V) on any properly built PSU (18 AWG wires, or better).
Together these connectors can safely provide 612W+.

So unless you are planning to do some LN2 runs where the power consumption could in theory exceed this limit, there is no need to connect the additional ATX12V connector.

Below is link to video of my C7H with R5 3600 using PBO+150MHz with 4x8GB @ 3800MHz running ~10hrs Kahru RAM Test with only ATX12V 8 pin connected.

https://youtu.be/oI8QHoJxRfg

and my bioss Version is 7403

I would use UEFI 7501, as you have 3000 series CPU it is best to aim to use latest UEFI.

From the info in your first post you are using a single 16GB dimm (HX432C16FB3/16), if so perhaps this is the cause of Q-Code: 8, are you able to try some differing RAM from say a friends system?

[DavidFpv]

Q-Code: 8 can occur for a number of reasons. I have seen it occur even on a crash where CPU is sufficiently powered. I have seen it on flaky OC profile. I have seen it when RAM is having an issue. All in all it just seems an all round code for borked operation in my opinion.



You do not need the extra 4 pin power connected, unless you are gonna use LN2 and really hammer an OC out of CPU.

I have used C6H and C7H for lengthy periods, with OC CPU/RAM on R7 1700/ R7 1800X/R7 2700X/R5 3600 and not had an issue with just using the 8 pin CPU connected. I have high load stress tests with OC CPU/RAM with only the 8 pin power plug connected.

This post (link) and this one (link) has info by The Stilt.



Below is link to video of my C7H with R5 3600 using PBO+150MHz with 4x8GB @ 3800MHz running ~10hrs Kahru RAM Test with only ATX12V 8 pin connected.

https://youtu.be/oI8QHoJxRfg



I would use UEFI 7501, as you have 3000 series CPU it is best to aim to use latest UEFI.

From the info in your first post you are using a single 16GB dimm (HX432C16FB3/16), if so perhaps this is the cause of Q-Code: 8, are you able to try some differing RAM from say a friends system?

I have 2 RAM cards each of which is 16

And still once in a short while while turning on the computer I see the post code again

[skellattarr]

try pulling your CPU out and check pins and reseat the CPU then check all your power connections and make sure memory is seated ok

[DavidFpv]

try pulling your CPU out and check pins and reseat the CPU then check all your power connections and make sure memory is seated ok

I've checked before.
Everything was fine.

Today the code 04 also jumped