dual channel memory

[Nedov]

I installed the second memory bar, the same as the first one, but the memory does not work in dual channel mode. Bios and Windows define all memory. What could be the problem? where to look?

[Lil_Boy_Blue]

Hi
Make, Model and OS please.
SKU: if possible by this method
WinKey + R and type msinfo32 Line 9
System SKU: N6K07EA#ABU

Please do not post Serial Numbers.

Results for " HP Pavilion 15 Notebook PC" (35144)

Piriform Speccy will help to ID the memory.

[Nedov]

System SKU:J0D38EA#ABU

[Lil_Boy_Blue]

Hi

What did Speccy report?

https://support.hp.com/us-en/product/hp-pavilion-15-p000-notebook-pc-series/6936226/model/7176951?sk...

""Bios and Windows define all memory. ""

So what memory is reported in the BIOS?  What memory is reported in Windows?

[Nedov]

А8-6410 APU AMD с графикой AMD Radeon R5 ГБ 2,00 ГГц 16,0 (14,9 ГБ доступно)

[Nedov]

I have installed two slats Elpida EBJ81UG8EFU0-GN-F

[Lil_Boy_Blue]

Hi

https://support.hp.com/us-en/product/hp-pavilion-15-p000-notebook-pc-series/6936226/model/7176951

http://h10032.www1.hp.com/ctg/Manual/c04402649

So does each individual memory module work?

How much ram is reported?

What does Piriform Speccy report for each individual memort stick?

RAM
        Memory slots
            Total memory slots    2
            Used memory slots    1
            Free memory slots    1
        Memory
            Type    DDR3
            Size    8192 MBytes
            Channels #    Single
            DRAM Frequency    798.4 MHz
            CAS# Latency (CL)    11 clocks
            RAS# to CAS# Delay (tRCD)    11 clocks
            RAS# Precharge (tRP)    12 clocks
            Cycle Time (tRAS)    28 clocks
            Bank Cycle Time (tRC)    39 clocks
        Physical Memory
            Memory Usage    52 %
            Total Physical    6.94 GB
            Available Physical    3.31 GB
            Total Virtual    14 GB
            Available Virtual    9.00 GB
        SPD
            Number Of SPD Modules    1
                Slot #1
                    Type    DDR3
                    Size    8192 MBytes
                    Manufacturer    Samsung
                    Max Bandwidth    PC3-12800 (800 MHz)
                    Part Number    M471B1G73DB0-YK0
                    Serial Number    328347847
                    Week/year    33 / 15

[Nedov]

RAM
  Memory slots
   Total memory slots 2
   Used memory slots 2
   Free memory slots 0
  Memory
   Type DDR3
   Size 16384 MBytes
   Channels # Single
   DRAM Frequency 665.3 MHz
   CAS# Latency (CL) 9 clocks
   RAS# to CAS# Delay (tRCD) 9 clocks
   RAS# Precharge (tRP) 10 clocks
   Cycle Time (tRAS) 24 clocks
   Bank Cycle Time (tRC) 33 clocks
  Physical Memory
   Memory Usage 37 %
   Total Physical 15 ГБ
   Available Physical 9.38 GB
   Total Virtual 17 ГБ
   Available Virtual 11 GB
  SPD
   Number Of SPD Modules 2
    Slot #1
    Slot #2

[Lil_Boy_Blue]

Hi

Well since you didn't post slot 1 and slot 2, with the info supplied

 Size 16384 MBytes

 Total Physical 15 ГБ

Available Physical 9.38 GB

I dont see a problem. 

You have 16 in total, maybe 1 is for video like mine,  and 15 remaining.

Used 5. 6 and 9.4 remain.

[Nedov]

Both slots are busy, so the memory should work in dual channel mode but in fact it works in single channel mode.