How common is 3466 MHz RAM support on coffee lake? - Overclock.net - An Overclocking Community

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How common is 3466 MHz RAM support on coffee lake?

 
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post #1 of 4 (permalink) Old 01-10-2018, 06:55 PM - Thread Starter
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I have a Z370-F Strix, 2x8 GB Samsung B-die(?) Corsair Vengeance RGB 3466 MHz CÖ16 and an i7 8700K.
The RAM is on my motherboard QVL.

I got blue screens daily of various sorts. Intel XTU one hour processor benchmark was fine. 10 minutes RAM too, or if I'm mixing things up. Prime also ran fine.

However running memtest86 default even within 15 minutes I had 30 errors with XMP on all caused in test 6.

Running test 6 again with sequential core usage over all cores added another 14 errors.

I've run 30+ minutes of two passes of test 6 (block move) sequentual core usage at 2666 MHz haven't generated any error.

Is the largest chance my i7 8700K memory controller too **** for 3466 MHz at least at stock XMP settings?
I figured it would be worry free on Intel because of the high listed numbers as far as MB support goes and all the whining on AMD.

I have an MSI Gaming M5 card here too should I try to see if I get better results with that?

I guess I could try single modules and frequencies in between as well as running a but longer on 2666 MHz.

Any top recommendations to try first to hit 3466 MHz?

What are the odds of improved motherboard support solving it or should I assume it's the processor? Is this common or bad luck? I had another processor at home but didn't felt comfortable putting it in and haven't done any CPU over clocking and didn't felt like I wanted to use a better cooler and figure out which one was better but now with all the blues screens ..

Worth trying the other motherboard? Return this motherboaRd? They may not let me return the CPU any longer. I could possibly try another. If 2666 MHz work I'm doomed as far as RMA goes I suppose.
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post #2 of 4 (permalink) Old 01-10-2018, 08:53 PM
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I had a faulty z370 board that wouldnt wake from sleep seems likely but more likely is bad ram that gets through memtest.

I'd make sure youre on latest bios ten try running each dimm separately to see if you still get crashes, lowering memory clocks, making sure the correct voltage is set, testing a good dimm in each of the boards memory slots separately.

Main Rig
(8 items)
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Asus GTX 1080 Strix
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8gb 3200mhz corsair from CEX
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500gb Samsung 850 Pro
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post #3 of 4 (permalink) Old 01-11-2018, 04:06 AM - Thread Starter
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Well they didn't get through the mem test for sure. Failed fast at 3466 as said.

2666 worked when tested a pair of hours and 3200 worked for hours too.

Running the first stick alone at 3466 (xmp settings) now.

I don't know if the 3200 setting give other latencies or voltage.

Once I've tried both sticks like this should I also try xmp on the gaming m5?
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post #4 of 4 (permalink) Old 01-11-2018, 05:15 AM - Thread Starter
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They work alone (xmp 3466 mhz) for four passes from the bios version (never run the uefi version first and hence haven't used it if the results are different.)

That's only like 35 minutes per module though.
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