VI Formula qcode 55 slots A1 A2 ram not detected

[kyufaker]

Dear Friends,

My mobo has started kicking a fuss ever since I switched from 2 ram sticks to 4 sticks. I recently got a matching pair of cors veng 2133mhz 1.5V ram with same latencies. Upon installation the board kicked up qcode 55, but a cmos reset sorted that out.

Today after delidding my 4670k, the mobo refused to take ram in the first two slots. At the moment i have stuck a pair of sticks into slots B1 and B2, which I believe is not adviseable, do let me know if this is alright.

I have read a number of guides about this error and most are pointing at an issue with overtightening the cpu cooler, ive been using the stock cooler for the past week, so it cannot be that! There are no scratches or cracks on the pcb. I have also flashed bios again, as suggested by raja for z170 boards. Mobo pins are fine and so is the underside of the cpu.

Pc seems to work fine with sticks in B slots, although I have not tried xmp profiles yet.

Can you please advise what I can do? Is this RMA/bin? What is the long term impact of using B1 B2 slots together?

Im in such a bad shape after I finally got all parts to my fully custom looped rog pc...

Any advice will be much appreciated, many thanks!

[Nate152]

Hello kyufaker

No harm will be done running your sticks in slots B1-B2 but your ram is only running in single channel. It's not advised to mix ram kits even of the same specs and I suspect this is contributing to your problem, always purchase a single kit of the capacity you want.

What slots did you have your ram in before you added the other 2 sticks?

http://rog.asus.com/forum/showthread.php?57038-Don’t-combine-memory-kits!-The-meat-and-potatoes-over...

[kyufaker]

Hey I was running them in A2/B2 mate.

The old and the new ram are pretty much the same, corsair vengeance, 2x4 2133mhz, 1.5v, same latencies, but dont remmeber them off the top of my head, only difference was that one kit is v3.24 other is 4.17 i think

[Nate152]

I recommend this kit for your board, 2 sticks will put less strain on the cpu's memory controller.

4x4GB kit
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231588

2x8GB kit
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231589

[NemesisChild]

As Nate mentioned, it's not advisable to run unmatched sets of memory even if they are the same make & model.

[kyufaker]

Thanks, but doesn't really address the problem though. Not even single stick works in A1/A2 I am afraid.

Any particular reason Gskill 1.65 is preferable for my corsairs?

[Nate152]

You say you did have 2 sticks in slots A2-B2 and was working and after delidding your cpu is when the problem started.

2 things come to mind.

Either your cpu cooler is a little too tight or you may have bent a couple cpu socket pins installing it after delidding. Try loosening your cpu cooler a touch and if that doesn't help, remove the cpu and inspect the cpu socket in good light with a magnifying glass. Look close and carefully and make sure they are all evenly spaced and in order.

If you get all 4 slots working you might get lucky and get all four sticks to work by setting them manually instead of using X.M.P. but then again they may not that's why it's not advisable to mix ram kits, it's not worth taking the chance.

After comparing the corsair vengeance and trident x 2400MHz kits they both have the same specs, normally the trident x will have a little tighter timings. I like the trident x for the color scheme and matches ROG boards nicely.

2x4GB 2400MHz
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233351

[kyufaker]

Ok will do that mate. Using stock cooler at the mo so pretty sure it wont be tightenning issue. Guess i will be after a magnifying glass then. Will update in a few days. Thanks

[Nate152]

You're welcome

Yeah it's hard to overtighten the intel stock cooler as it has the push pins, so check the cpu socket, look over it close and carefully in good light with a magnifying glass. You can post some close up pictures of your cpu socket if you like and we can take a look at it.

We'll be waiting for an update.

[kyufaker]

Here it is, found some fluff under one of the pins, blew it away. Other than that nothing out of ordinary. Pls see below pic: