Memory not usable

[BalearicLion]

Hi

Just upgraded my processor to a FX 9590 which is running sweet at 40c and max out 59c in Battlefield 4. At same time I replaced my Patriot Black Mamba Viper ram (PV38G160C9K) 4 X 4GB 1600mhz WITH 2 X 8GB Kingston Beast Hyper X 2133mhz. Was always reading and using 16 gb. Now 1t only shows 8gb in bios installed yet in the Tools it is seeing both sticks, boot into Windows 8.1 and that says 16gb (7.48 usable) or something like that. Tried putting my Patriot back to test the slots and now only 8gb is showing in bios.

I have had the MB for 1 year and previously had a FX 8320 processor.

Anyone got any ideas?

Many thanks in advance

[TaijRai]

I just had this same issue with a different MOBO/CPU, the fix was easy...needed to disable AMD Turbo Mode in the bios. 8 gigs of ram went to the correct 16

[TheNerdBench]

First make sure that you have the PSU power switch in the OFF/0 position because the +Vsb voltage is still following to the memory slots. If you removed the memory modules without completing the that step then it is possible you may of caused damage to the M/B (due to micro-arcing which may of "fried" the address buffers in the North-bridge/memory controller).

Here are a few other things to try...
1) Try install a single 8 GB memory stick in each slot (again-heed warning on turning OFF the switch on the PSU)
2) Alternate to the other 8 GB memory stick and repeat step 1
3) If both memory sticks function individually try putting both of them in but varying the slots

NOTE: I am NOT a fan of the single edge ejector memory slots! There has been more than one forum user who thought their memory or motherboard was defective only to find out that the memory was not installed correctly. I would also suggest resetting the BIOS as Chris suggested after each test. For what is it worth if the BIOS isn't detecting your memory it is very doubtful that the OS will detect the memory...just want to clarify that to others who may use the thread for trouble-shooting purposes.

[BalearicLion]

Ok, Asus replaced the MB and it is all still the exact same. Interestingly well to me the 2133 KINGSTON Memory in the QVL has a different number to what Kingston use eg it starts as KHX2133 yet the Kingston number is HX321 after that it follows the same also the QVL has the wrong speeds.

It seems I can run this memory at 1600Mhz and I get 16gb, change the settings to 2133 (using CPUID timings) and it is only 7.9 usable again according to Windows.

Any other ideas to try? I am talking to Kingston and the tech team there now has the problem to look at so maybe they can suggest something, I would be happy with it running at 1866 if I was getting 16gb but no idea how I would even find those timings.

[sectionate]

TheNerdBench wrote:
First make sure that you have the PSU power switch in the OFF/0 position because the +Vsb voltage is still following to the memory slots. If you removed the memory modules without completing the that step then it is possible you may of caused damage to the M/B (due to micro-arcing which may of "fried" the address buffers in the North-bridge/memory controller).

Here are a few other things to try...
1) Try install a single 8 GB memory stick in each slot (again-heed warning on turning OFF the switch on the PSU)
2) Alternate to the other 8 GB memory stick and repeat step 1
3) If both memory sticks function individually try putting both of them in but varying the slots

NOTE: I am NOT a fan of the single edge ejector memory slots! There has been more than one forum user who thought their memory or motherboard was defective only to find out that the memory was not installed correctly. I would also suggest resetting the BIOS as Chris suggested after each test. For what is it worth if the BIOS isn't detecting your memory it is very doubtful that the OS will detect the memory...just want to clarify that to others who may use the thread for trouble-shooting purposes.

What do you think my issue is when this happens. Post reports 12 gigs, then bios shows all sticks (in the three or four places you can check)

[BalearicLion]

Eureka, problem is solved

For the benefit of anyone else who has this problem this is what has worked for me.

Install the memoty in slots 1 & 2 not 1 & 3 as the manual suggests.
Timings are for Kingston Hyper x Beast 11, 12, 12, 30 rtc 48 1T
I also adjusted the voltage manually first with Digi+ to 1.6v


I also now have the FX9590 running at 40c underload using a Corsair 300R case and Corsair H100i cooler

I would like to add thanks to Chris and TheNerdBench for the helpful advice and tips with this problem

[Muha_Akhusiyya]

Do you mean slots 1 and 3 instead of 2 and 4? Because, if you have installed your memory in slots 1 and 2, it will run in a single-channel mode.

By the way, sometimes, when changing memory, I have problems with one of the sticks seated in slots 2 and 4 being not recognized. Reseating the memory has so far been able to solve the problem.

[BalearicLion]

Hi,
Yes I do mean slots 1 and 2 1 and 3, or 2 and 4 do not work as you will read in this thread. I have pictures of if only recognising 8gb of memory yet Windows seeing al 16 but only 1 stick is usable.

Channels 1 and 2 might not be the optimum but it is the only way it works and running a FX 9590 at 33c at idle and 40c underload is the lowest temps I have seen for that processor so for the moment I am happy. The board may well support memory upto 2400 but good luck getting a processor to cope with it as I found out the 9590 only supports upto 1866.