Z87X-OC vs KHXB 2400C11 16GB

The problem with this is simple. I have seen it before on the OC several times. The OC is not adjusting subtimings when going from 2 to 4 dimms. Manually in putted will work fine.

I am at Iseries so cant test that specific setup.

Post up your memory bios screens at XMP. Then I can see the sub timings that may need forcing. TREFI and TRFC for starters!!!!
 
maybe trying system performance enhance on standard might help,that setting tightens/loosens 2nd/3rd timings
 
Seriously he is not!!!

I think the key will lie in the tertiary timings. Rack em up and we can check em out.
 
Will get them up as soon as I get home from work (on my day off too!!!!).

I didn't go as far as checking seconds and thirds, just primaries and trfc which iirc was around 216.
 
Urgh FML.

Now refusing to post at 2400!!

Strangely enough, my bios is now reporting to be F03, I could swear it was F06 yesterday :confused:
 
wazza300 said:
maybe trying system performance enhance on standard might help,that setting tightens/loosens 2nd/3rd timings
Click to expand...

I just tried this out of interest, setting the highest profile 'extreme' gives me a 4.7ghz CPU clock and sticks the ram at 2133 9-14-14-36-171-2T

Rroff said:
Sounds like you've got different ICs to me if you need over 200 tRFC :S
Click to expand...

I had looked into this, both kits report the same manufacturing year/month so I would presume they are all the same IC.
 
Sorry meant sounds like you've got different ICs on them to my 2400 KHX kit w/ 4x4GB as I don't need anything like 200 tRFC iirc 171 for 2400 and about 109 for my normal settings at 2133.

EDIT: Not really sure if it makes any difference (but who knows) but this RAM seems to have been optimised around memory controllers running 1.3 and higher voltages which is a bit of a no no for current round of intel chips in most cases but I'm having to push the voltages to the edge of whats sensible to get 2400 stable so it might be somehow related to that. I bought em to do 2133 CAS9 with tight timings anyhow which they do nicely which gives the best performance for what I do.
 
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Ahh sorry I misread your post :p

God knows whats happening now, regardless of bios it now refuses to post at 2400mhz with ANY timings.

@Pack, XMP reported 2400 profile (managed to get that by flicking to F8) for tRFC is 192 and tREFI is reported to be at 9400.

Does this board have an option for OC re-try? If it fails to post once it just says OC failed and go's back to default, iirc on my MSI X79 board you could set re-try count and force full start up memory training.
 
Same here for those profiles:

h9Bzcuo.png

But I can use the sub-timings from the ones with 171 tRFC to get 2400 stable and the 109 one for 2133 on my setup.

EDIT: As per my thread in the other forum though it wasn't until Jan this year they released a BIOS update for my board that properly supported them at 2400MHz so you might be waiting awhile :|
 
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Cheers roff I just tried those, even then flat 15 timings won't post.

Something's not happening as it should at 2400mhz, at 2133 its letting me tighten up like crazy without adding volts to anything yet 2400 won't post with pointlessly slack timings and silly volts :(

Edit: also no option at all to change CR on this:confused:
 
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Sounds similiar story to my thread when I first got this setup - 2400 just wasn't having it - then gigabyte released a BIOS out the blue in Jan which made 2400 work fine(ish) - still needs a lot of voltage but no more BSOD/boot problems.
 
Paul go back to original bios you had at the start of this!! The one your at least familiar with the OC behaviour and work with the timings.
 
8 Pack said:
Paul go back to original bios you had at the start of this!! The one your at least familiar with the OC behaviour and work with the timings.
Click to expand...

Will do, tbh there isn't much difference (option wise) between F3 and F8.

I found CR, was tucked in with the seconds.

Crazy it won't touch 2400mhz yet I can do this at 2133...

2133%20TIGHT.jpg
 
Lol this things a laugh a ******* minute.

Take bios screens, nice and easy yeah? Nope not for gigabyte, pressing f12 causes the system to hard lock

Hard locks on F3 and F8. So bios screens atm are out of the question.
 
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