[Guide] CoffeeLake CPUs on Skylake and KabyLake mainboards

Hey, I’ve got a weird problem.

I picked up a used 9700k from CEX in the UK and tried to get it to work with my Asus z170-p motherboard.

I shorted and isolated the correct pins and modified the bios with coffeetime, but couldn’t get it to boot. The motherboard will turn on but will turn back off and boot cycle after about 5 seconds.

Looking at my CPU, it seems to have the PCB of a B0 (4 core) chip rather than the P0 or R0 that a 9700k should have


Is there a reasonable explanation for this? Or has someone swapped the IHS with a worse CPU and conned CEX into accepting it?

8 core does require different number of SMD parts than 4 core. So if it is exactly like a quad, than something is very fishy. Pics?



My ASRock is going to reboot for something like 5 times after the BIOS update. After that everything is fine. Maybe you have to wait longer.

The forum won’t let me post pictures or links since my account is too new, but it looks exactly like the B0 stepping seen on the i3-8100-8350k.

@toung421
I’m sorry, but if PCB looks like B0 - it’s 100% fake.
It’s may be any Kaby Lake also, e.g. Celeron.
Remove all pinmod from CPU and add 906E9 and 906EB microcodes into modbios, then try to start it.

Its one of the more lucky fakes though, as the CPU could at least run. There have been several Socket 1150, 1155, 1156 and even some 775 with "Core i?-9???" relabeling. Good luck with the dealer, though. Such things are hard to prove.

YES! this mainboard is skl only,no kbl

HP 280 G2 Pro MT MAN_A054 FROM HP.rar (4.02 MB)

@svarmod
What about VRM temps on a 9700k, can it handle it at stock settings?

I have 60mm fans on VRM and water cooled 6700k @4.7ATM

Does anybody know what area of the board the bios chips are located at on the Maximus IX Extreme board?

Hello! I’ve got a deal on a 9900ks and was wondering If my ASUS z170-a has The capability to run it? I am specially worried about higher tdp of The ks model. Or am I just better off selling my mobo and get a new one. If The vrm is sufficient and all is otherwise green, i’m gonna short the skt_occ pin to ground and do the BIOS mods. And is it absolutely necessary to isolate the couple of pins on The cpu?



looks like z170-a is 8 phase. Shouldn’t be any problems there, just watch vrm temps under prolonged high load and make sure there’s proper airflow. Set more conservative short/long term power limits if you’re worried.

From reading the changelog, it looks like coffeetime can support 16t on the 3xxx z170-a bioses. If not, you’ll either need to mod the bios to disable ht or run 2xxx (terrible ram scaling).

z170 pro gaming/aura here (dirt cheap open box special). Just penciled skt_occ and didn’t isolate any pads. 8600k/8700k/9700k pads all looked fine when I pulled them. If anything burnt, it’d be the socket pins, but I haven’t checked. z170-a likely the same, but don’t take my word for it.

Giving coffeetime 0.92 a go for an asus z170 pro gaming/aura + 9700k without nvme. Are there any downsides to throwing the kitchen sink at it? Don’t need init 8+ cpus, acpi tables, nvme fix, or asus 12t blockers right now, but they’d be useful if I ever want to swap in an 8700k/9900k. Or would patching/not patching acpi tables be the cause for low vids / unstable with >c3 without excessive voltage set?

Programming a spare chip now to test

edit: Looks like behavior is the same. On default settings, everything seems stable, but the worst case vid table is too aggressive: load voltages around 1.45v. Setting best case (0.01 ia loadline), llc3 (slight full load droop) with a +0.075v offset, and limiting c-states to c3, and we’re back in business. Adaptive turbo vcore is still broken. Could this (and inability to run deeper c-states without excessive voltage) be affected by the acpi patch?

I haven’t tested, but to run full c-states requires far more offset.

I tested fixed voltage a while back and found 4.7ghz to need ~1.24v actual. I believe this was done with c-states disabled. With the current offset and llc3, I’m seeing ~1.27v with a heavy load and a max vid of 1.34v (lighter loads obviously closer to 1.32v). If anything, llc can probably come down another notch to get heavy load voltages down further

edit2: I read up on the acpi patch. Doesn’t look like it

edit3: Decided to try running it close to spec: llc1 (lowest), 1.6mohm ia ac/dc loadline, auto voltages. Still saw idle/transition whea bsods. Then realized this psu is old and cheap and probably can’t handle c6/c7. Disabled c7/c8, and reported vcore seems to bottom out the same at c6 as at c3. Another bsod and c6 will go off as well.







https://www.gigabyte.com/Mini-PcSystem/G…support-dl-bios

PLZ CHECK & FIX
THX

@jordanpchome
This case described in CoffeeTime changelog in readme.txt - AMI table has custom name changed by vendor.
All you need is create "data/custom/aminames.txt" and write a string with table name from info window: "GBTUACPI".
Then try patch ACPI again - it should be ok.




I use the function of modifying vBIOS and gpt, but the replacement is unsuccessful. The same is the old version number. My wn10 system is in Chinese. Is this caused by this?

edit edit edit
SOORY

@OminousStrike
Try this bios for M9E - it’s most complete modbios variant for 9700k at the moment (use SPI programmer).
But I think your problem not linked with coffee mod. Did you tried plug in GPU right into board w/o riser? Same troubles?

I’m using this variant of svarmod

[quote=Oraculo®|p127492]@OminousStrike
Try this bios for M9E - it’s most complete modbios variant for 9700k at the moment (use SPI programmer).
But I think your problem not linked with coffee mod. Did you tried plug in GPU right into board w/o riser? Same troubles? /quote]

I’m using this variant of svarmod



Thanks! Going to mod my bios and pickup a 128GB set. Does the last change allow me to use Asus’ 3801 bios with the 16T on the M8F or should I continue using 2202? I’ve been using my 9900K for more than a year now without any issues. The 2202 bios has a few bugs but they’re easy to work around.

Hi @svarmod , i want use i3 8100 with mb asrock z270 extreme4 , so i mod bios by CoffeeTime to create file bios then i copy file bios in usb and flash by instant flash of asrock but it notice instant flash secure so i use UBU to remove instant protect flash . I flash bios done but when i place i3 8100 in main ,it not working .Can you help me solution this problem . Tks you so much