RAM not running in dual channel?

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Solution
boju
Couldn't find a video of your board but this should be close enough. From 40s he configures for 2667 then later on configures for 3200.

Ai overclock tuner: D.O.C.P Standard
D.O.C.P to XMP profile (Your memory should register an XMP profile) and select your memory like he has.
Check Dram voltage is 1.35v
--
If it is at 1.35v and still not working, try adjust Dram boot voltage as described in video. Hope your board has this feature.

--

If still not working, try swap memory around. Might have to return memory for Ryzen certified. I know it's a bit more expensive since memory manufactures have figured Samsung B-die kits works well with Ryzen and slapped a 'certified' sticker and hiked the price.

[video="https://www.youtube.com/watch?v=9uiK_JYVQH0"][/video]
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boju

boju

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Where are you reading single channel?

A2 B2 is correct. 2nd and 4th slot outwards from cpu.

My guess is theres confusion between dual channel and double data rate. It is normal for diagnostic programs like cpuid to read memory as single data rate. In which case your memory will be read as 1066. Bios is the only place to see DDR readings.
 
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buddymeister

Jul 12, 2018
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Check out this for all the pictures I have for extra information about the problem https://www.reddit.com/r/pcmasterrace/comments/8zqbeg/16gb_of_ram_recognized_but_only_says_8gb_max/?utm_content=full_comments&utm_medium=message&utm_source=reddit&utm_name=frontpage

In the bios it sees both ram sticks in slots A2 and B2. Yet right above the section where it shows the ram slots it says max installed ram is 8gb.
 
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boju

boju

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F4-3000C15D-16GVGB uses Hynix chips, people have had trouble trying to achieve 3000MHz + with Hynix. Have you tried lowering the speed profile to 2133? Try that and see if dual channel activates. If it does, Hynix is at fault and updating the motherboard bios hoping for better memory support.

Samsung B-Die chips are a lot more friendlier with Ryzen boards and these are the go-to chip for these speeds. Hynix is a hit and miss, hopefully bios update helps you.


https://www.reddit.com/r/Amd/comments/62vp2g/clearing_up_any_samsung_bdie_confusion_eg_on/
 
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buddymeister

Jul 12, 2018
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Unfortunately the memory won't oc to 3000MHz and is at 2133MHz. I've already updated my bios tho unfortunately.
 
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buddymeister

Jul 12, 2018
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I put everything on pcpartpicker yeah, the motherboard doesnt have my set of ram as "certified" but it should still work at 2133MHz. The bios version is still the updated version, not sure if anything changed. I can check but what kind of change should I be looking for?
 
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boju

boju

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Revision number mostly. There might be other settings included but obviously hard to know whats new.

Clearing cmos allows new data to be entered from the new bios into cmos. Sometimes needing to load bios defaults to complete.

Should be able to set memory to 3000 @ 1.35v using xmp memory profile. make sure its set to 1.35v and not on auto.
 
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boju

boju

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Couldn't find a video of your board but this should be close enough. From 40s he configures for 2667 then later on configures for 3200.

Ai overclock tuner: D.O.C.P Standard
D.O.C.P to XMP profile (Your memory should register an XMP profile) and select your memory like he has.
Check Dram voltage is 1.35v
--
If it is at 1.35v and still not working, try adjust Dram boot voltage as described in video. Hope your board has this feature.

--

If still not working, try swap memory around. Might have to return memory for Ryzen certified. I know it's a bit more expensive since memory manufactures have figured Samsung B-die kits works well with Ryzen and slapped a 'certified' sticker and hiked the price.

[video="https://www.youtube.com/watch?v=9uiK_JYVQH0"][/video]
 
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Solution
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buddymeister

Jul 12, 2018
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Yeah I just tried all the slots B1 and B2 didnt work with either of the sticks of ram and in A1 and A2 both are working at the same time and there are no current problems. So I'm assuming this means B1 and B2 are faulty slots and I should ask for a replacement mobo from Asus?
 
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buddymeister

Jul 12, 2018
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Thanks for all the help man, it would seem as if slots B1 and B2 are defective as when either are populated the computer does not recognize the ram. In slots A1 and B2, the pc boots perfectly fine, RAM is now OC'd using preset DOCP settings and everything seems to be running fine. I'm thinking I should return the mobo since these slots are defective just to have a totally working mobo for future proofing.
 
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