System Only Read 8GB RAM but Windows and CPUZ Read 16GB already tried many things

Jun 24, 2018
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My System :
Windows 10 Pro 64Bit
Motherboard: GA-78LMT-USB3 V.6.0 F2
Processor: AMD FX-8350 @4.00Ghz
Memory: DDR 3 Team Elite Plus 12800 4Gb x4 @1600Mhz
GPU: NVIDIA GeForce GTX 1060 6GB
PSU: PSU 620w SEASONIC M12II-620, 80PLUS Bronze

My Case :
first thing , i know many people have same problem like i do, but i already tried many things but none seems worked
My BIOS splash sceen only show 8GB of my ram , but my cpuz and windows can read 16gb except for windows only 7.98GB usable.

i tried many things like :
1. swapping RAM slots
2. update the lastest BIOS
3. uncheck memory in msconfig/set maximum ram
4. running memtest86 and everything is fine
5. try truncatememory in cmd
6. downgrade from 1600mhz to 1333mhz

Video Pnp :
CPUZ :
Chipset
-------------------------------------------------------------------------

Northbridge AMD 780G rev. 00
Southbridge AMD SB700 rev. 00
Graphic Interface PCI-Express
PCI-E Link Width x8
PCI-E Max Link Width x16
Memory Type DDR3
Memory Size 16 GBytes
Channels Dual
Memory Frequency 666.6 MHz (3:10)
CAS# latency (CL) 9.0
RAS# to CAS# delay (tRCD) 9
RAS# Precharge (tRP) 9
Cycle Time (tRAS) 24
Bank Cycle Time (tRC) 33
Uncore Frequency 2199.9 MHz


Memory SPD
-------------------------------------------------------------------------

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Team Group Inc. (7F7F7F7FEF000000000000)
Size 4096 MBytes
Max bandwidth PC3-12800 (800 MHz)
Part number Team-Elite-1600
Manufacturing date Week 07/Year 15
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-16-22 @ 457 MHz
JEDEC #3 7.0-7-7-19-26 @ 533 MHz
JEDEC #4 8.0-8-8-22-30 @ 609 MHz
JEDEC #5 9.0-9-9-24-33 @ 685 MHz
JEDEC #6 10.0-10-10-27-37 @ 761 MHz
JEDEC #7 11.0-11-11-28-39 @ 800 MHz

DIMM # 2
SMBus address 0x51
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Team Group Inc. (7F7F7F7FEF000000000000)
Size 4096 MBytes
Max bandwidth PC3-12800 (800 MHz)
Part number Team-Elite-1600
Manufacturing date Week 35/Year 15
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-16-22 @ 457 MHz
JEDEC #3 7.0-7-7-19-26 @ 533 MHz
JEDEC #4 8.0-8-8-22-30 @ 609 MHz
JEDEC #5 9.0-9-9-24-33 @ 685 MHz
JEDEC #6 10.0-10-10-27-37 @ 761 MHz
JEDEC #7 11.0-11-11-28-39 @ 800 MHz

DIMM # 3
SMBus address 0x52
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Team Group Inc. (7F7F7F7FEF000000000000)
Size 4096 MBytes
Max bandwidth PC3-12800 (800 MHz)
Part number Team-Elite-1600
Manufacturing date Week 09/Year 15
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-16-22 @ 457 MHz
JEDEC #3 7.0-7-7-19-26 @ 533 MHz
JEDEC #4 8.0-8-8-22-30 @ 609 MHz
JEDEC #5 9.0-9-9-24-33 @ 685 MHz
JEDEC #6 10.0-10-10-27-37 @ 761 MHz
JEDEC #7 11.0-11-11-28-39 @ 800 MHz

DIMM # 4
SMBus address 0x53
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Team Group Inc. (7F7F7F7FEF000000000000)
Size 4096 MBytes
Max bandwidth PC3-12800 (800 MHz)
Part number TEAMGROUP-UD3-1600
Serial number 03021ABA
Manufacturing date Week 15/Year 18
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-16-22 @ 457 MHz
JEDEC #3 7.0-7-7-19-26 @ 533 MHz
JEDEC #4 8.0-8-8-22-30 @ 609 MHz
JEDEC #5 9.0-9-9-24-33 @ 685 MHz
JEDEC #6 10.0-10-10-27-37 @ 761 MHz
JEDEC #7 11.0-11-11-28-39 @ 800 MHz

DIMM # 1
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 10 0B 02 04 21 00 01 03 52 01 08 0A 00 FE 00
10 69 78 69 30 69 11 18 81 60 09 3C 3C 00 F0 83 05
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 EF 00 15 07 00 00 00 00 7D 45
80 54 65 61 6D 2D 45 6C 69 74 65 2D 31 36 30 30 20
90 20 20 00 00 04 EF 00 00 00 00 00 00 00 00 00 00
A0 10 15 02 10 01 20 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DIMM # 2
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 10 0B 02 04 21 00 01 03 52 01 08 0A 00 FE 00
10 69 78 69 30 69 11 18 81 60 09 3C 3C 00 F0 83 05
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 EF 00 15 35 00 00 00 00 7D 45
80 54 65 61 6D 2D 45 6C 69 74 65 2D 31 36 30 30 20
90 20 20 00 00 04 EF 00 00 00 00 00 00 00 00 00 00
A0 1A 15 08 25 00 80 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DIMM # 3
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 10 0B 02 04 21 00 01 03 52 01 08 0A 00 FE 00
10 69 78 69 30 69 11 18 81 60 09 3C 3C 00 F0 83 05
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 EF 00 15 09 00 00 00 00 7D 45
80 54 65 61 6D 2D 45 6C 69 74 65 2D 31 36 30 30 20
90 20 20 00 00 04 EF 00 00 00 00 00 00 00 00 00 00
A0 10 15 02 25 01 70 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

DIMM # 4
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 92 10 0B 02 03 19 00 09 03 52 01 08 0A 00 FE 00
10 69 78 69 30 69 11 18 81 00 05 3C 3C 00 F0 83 05
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 0F 11 01 01
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 04 EF 00 18 15 03 02 1A BA 90 27
80 54 45 41 4D 47 52 4F 55 50 2D 55 44 33 2D 31 36
90 30 30 00 00 04 EF 00 00 00 00 00 00 00 00 00 00
A0 10 17 06 20 02 00 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 18 84 04 20 97 0B 03 02 87 00 00 00 00 01 00 00
F0 47 50 35 35 00 00 00 00 00 00 00 00 01 62 14 29


Monitoring
-------------------------------------------------------------------------

Mainboard Model GA-78LMT-USB3 6.0 (0x0000040F - 0x86FAD200)


 

Lutfij

Titan
Moderator
Remove the CMOS battery and replace it after 15 mins. I would strongly advise on taking the settings down on a piece of paper as clearing the CMOS will reset all settings.

I would also advice on re-flashing the BIOS and see if that changes the issue. On another note, I'd also suggest backing up your critical content and reinstalling your OS after recreating your bootable USB installer with Windows Media Creation Tool.
 
Jun 24, 2018
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hi thanks for the reply , i already remove CMOS battery and re-seating again , and reflashing BIOS using Q-Flash but it seems dont work . my bios still detect half of my RAM
 
Hi

Is this a new problem ? or has this problem existed since the PC built?

Have you tried booting with only one stick of ram at a time
see if they all work and are recognised by the BIOS

is the ram a matched set of 4 x 4GB or two matched sets of 2 x 4GB or just 4 x 4MB ram DIMMs?

I hope you have not used too much thermal compound and got some on the CPU pins or have some bent CPU pins
(ones which affect memory management)

regards
Mike
 
Jun 24, 2018
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Hi

yes this is the new problem , in the old days i only use 2x4GB of ram dual channel and work just fine

I already tried booting all stick one at a time and they all work perfectly.
the ram is 2x4gb and i buy 2 others ram separately ,but i sure they all the same

im sure just put little thermal compound and no bents in my pin

RAM
 
Jun 24, 2018
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quick update :

my bios now can read 12gb out of 16gb ram
but the problem is i must put 4 sticks ,
if i only put 2 sticks it reads 8gb ,
if i put 3 sticks appear alert i must change the slot
if i put 4 sticks it runs well but only 12gb

initially i think it was my dimm_2 slot error , but when i put in dimm_1 still appear alert
i already tried memtest86 and stress test my ram but none error was found
 

Medo_1

Reputable
Aug 30, 2015
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0
4,640
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Have you tried refreshing windows? I feel like maybe the windows is having trouble with the ram and not an actual hardware issue. I say do this before considering RMA or new parts.
 

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