ASRock Z270 - Memory not recognised

[MikeJapan]

I have just bought an ASRock z270 gaming k6 mobo, i5 7600k, corsair ddr4 cmk16gx4m2a2666c16r (I know a bit below optimum), 750w cpu etc. Mobo would not boot so I gave it all to local pc builder. They got DIMM slots 3 snd 4 to work but neither 1 nor 2, so could not pair DIMMs. Shop tried their own DIMMs and another processor - same issue. BIOS reset every time. Got a replacement mobo. Same problem. Does anyone have any suggestions - please!

Thanks,

Mike

 

[Supahos]

Sounds like the memory controler on the cpu for those slots is messed up

 

[MikeJapan]

But wouldn't the shop's CPU work with their memory?

 

[Supahos]

Oh you had them use their cpu on the second board too?

 

[Supahos]

And either way I "suppose" it's possible your CPU is killing that part on the board. Hella unlikely, but that about all it can be

 

[MikeJapan]

Yup. They tried all combinations. They're lost and me too. Thanks for suggestion though.

 

[MikeJapan]

CPU killing mobo was on list of options. Seems pretty unlikely though. But may be the only possibility.

 

[Supahos]

I have seen it before once. But I'd never guess it first but I'd say a known good CPU having the exact same issue on 2 diff boards is pretty unlikely. The only constant seems to be your CPU. So that is where I start

 

[MikeJapan]

This is going to be a fun discussion with Amazon Japan… I have a tech query in with ASRock too, so may hang on, just in case.

 

[MikeJapan]

All new mobo and processor arriving tomorrow. Here's hoping!

 

[Supahos]

Good luck!

 

[MikeJapan]

Ok, solution found… a bit of a round about journey. Step by step:
1. Dead mobo seems to have damaged processor or vice versa (slots 1 and 2 not working)
2. Processor effected replacement mobo x 2
3. New proc and new mobo = all working! Well, on the bench anyway.

Components used:
RAM - original purchase only
CPU - x2
Mobo - x4!

Glad to have Amazon return policy.

Ah yes, also on 3rd heatsink as it was tricky to find one that would fit without fouling components.

Thanks to all for suggestions!

 

[Supahos]

That is extremely rare unless you placed the CPU in oriented improperly and tried to lock it down. I've helped one other person on here with same issue, but I've never run into it myself in any if my many builds for myself or others

 

[MikeJapan]

Got it all working in the end - thanks Supahos. Problem seems to have been as you surmised.

 

[Supahos]

Awesome glad you're up and running