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post #47971 of 67694
RAM Voltage. Little less of that turns the RAM to single channel.

Happened on my Giga and the Kitty.
post #47972 of 67694
Ram is now at 1.64v and cpu-nb is at 1.2v and it is still single channel. Oh well, it still has 8gb.
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post #47973 of 67694
but there's a significant lose in bandwidth with it being single channel.

Try loosening the timings
post #47974 of 67694
Quote:
Originally Posted by miklkit View Post

Or at least a Swiftech 240X. Anything less is worse than big air just because of the racket all those fans make.

While doing this last overclock I started at 4 and saved a pic of it but did not save any other pics until 4.6. Well, somewhere in there the bios decided to switch the ram from dual channel to single channel. I made it to 4.9 that way but want to get it back to dual channel before going for a fsb oc, but can not get it to do it.
I know no one knows anything about MSI bios, but are there any generic things that might work? I have already set everything memory related back to auto with no luck.

If you are not using FSB to OC (OC RAM), then I do not know why its dropping to single channel. The only time I have had a kit do this, is when I was overclocking the RAM. Have you changed which slots the sticks are installed?
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post #47975 of 67694
All 16 gb is recognized but only 7.95gb is useable. The ram has been at 1866 all along.

This has happened to me many times before when fsb OCing. It meant I had gone too far and I just backed off a click and it went back to dual channel. No I have not swapped ram around yet.
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post #47976 of 67694
Quote:
Originally Posted by miklkit View Post

All 16 gb is recognized but only 7.95gb is useable. The ram has been at 1866 all along.

This has happened to me many times before when fsb OCing. It meant I had gone too far and I just backed off a click and it went back to dual channel. No I have not swapped ram around yet.

Oh I see, you actually have a 16GB kit. I missed that you only have 8GB usable from 16GB. Well that explains single channel, but I do not understand why you are losing one stick (usable).

Does lowering CPU clock fix this? It sounds like RAM,MB, or IMC issue. Have you tried raising CPU/NB voltage?
Edited by pshootr - 3/25/15 at 7:12pm
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post #47977 of 67694
Quote:
Originally Posted by miklkit View Post

All 16 gb is recognized but only 7.95gb is useable. The ram has been at 1866 all along.

This has happened to me many times before when fsb OCing. It meant I had gone too far and I just backed off a click and it went back to dual channel. No I have not swapped ram around yet.

Might want to re-flash the bios, sounds like it could be corrupted.
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post #47978 of 67694
The ram is 4X4gb for 16 gb total. I am losing half of each stick as they are dual channel.

This is new with the 8370. The OC was unstable until I lowered the CPU-NB when I got to 4.9 ghz but the ram went to single channel before 4.6 when it was still at 1.4 v. I put everything back to auto and dropped the clocks to 4 and it stayed at single channel. I don't know what else to do and it looks like the Sabertooth will be getting its turn sooner than expected.

EDIT: Flash the bios? I have not had good luck trying to do that.
Edited by miklkit - 3/25/15 at 7:27pm
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post #47979 of 67694
Quote:
Originally Posted by miklkit View Post

The ram is 4X4gb for 16 gb total. I am losing half of each stick as they are dual channel.

This is new with the 8370. The OC was unstable until I lowered the CPU-NB when I got to 4.9 ghz but the ram went to single channel before 4.6 when it was still at 1.4 v. I put everything back to auto and dropped the clocks to 4 and it stayed at single channel. I don't know what else to do and it looks like the Sabertooth will be getting its turn sooner than expected.

EDIT: Flash the bios? I have not had good luck trying to do that.

Did you try clearing cmos then loading optimized defaults?
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post #47980 of 67694
HAH! Today is my lucky day! The bios flash worked on the 2nd attempt and I have dual channel memory again. You da man cssorkinman! thumb.gif
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AMD FX8370 @ 5 ghz ASUS Sabertooth Sapphire Fury G Skill F3-14900CL9Q-16GBXL 
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