8gb installed - 4 gb usable, Win 7 64bit Help

FatHitman · Nov 4, 2013

Intel Core i7-870 Lynnfield 2.93GHz LGA 1156 95W Quad-Core Processor BX80605I7870
ASUS P7P55D-E Pro LGA 1156 Intel P55 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
2 x ADATA XPG Gaming Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)

So I browsed around to try and find a solution just by using things people gave in other threads and nothing has worked.

My BIOS is up-to-date
Yes I have 64bit
The hardware is all good and windows and BIOS sees the 8gb of Ram
I have tried the Maximum Memory tick and untick method
memory mapping is enabled

I am just at a loss now with this and about to go crazy.

alexoiu · Nov 4, 2013

Try firstly clearing the CMOS (unplug the power cord and remove the CMOS battery for few minutes).

FatHitman · Nov 4, 2013

alexoiu :

could I just factory reset in the BIOS and it would be the same?

alexoiu · Nov 4, 2013

No. CMOS is different. Just clear it and see if still 4 GB. I know it's not easy. Try using the jumper (power cord unplugged) if difficult to access the battery.

FatHitman · Nov 4, 2013

alexoiu :

Did it and still only 4gb usable.

alexoiu · Nov 4, 2013

OK, Now test each slot with single RAM stick. See if the PC does POST in each situation. Make sure that the PC is powered off when removing and inserting the module.

FatHitman · Nov 4, 2013

Tried that and all the sticks are good.

Looking up my board showed a lot of people have this problem with it. Some fixed it by moving around the sticks and it finally just randomly using 8gbs. I am half tempted to get got out a buy 2x4gb RAM, maybe since I have 4x2gbs it has a hard time using all 4 sticks? I made sure they got enough voltage and everything.

alexoiu · Nov 4, 2013

Check also in msconfig if maximum memory unchecked.

FatHitman · Nov 4, 2013

alexoiu :

I did all that stuff

So I took out one of the RAM sticks and put in a extra 4gb stick that I had. So now the computer reads 10gbs but only has 6gbs usable.

So damn annoying!

alexoiu · Nov 4, 2013

Try clearing again the CMOS and adding the RAM sticks one by one.

FatHitman · Nov 4, 2013

One of the weird things is when I just use two sticks on the blue slots it boots up fine. But then if I do two only in the black slots and it wont POST.

alexoiu · Nov 4, 2013

Then it might be a CPU socket bent pins issue.
In this case, 2x4GB kit in the blue slots looks like the optimum solution.

FatHitman · Nov 4, 2013

I'm thinking it might be that too.

Newegg has a sale on sticks right now that fit my pc so I just ordered a 4gb stick

alexoiu · Nov 4, 2013

RAMs modules have to be identical for dual channel.

FatHitman · Nov 5, 2013

alexoiu :

Did some more testing and it seems that my 3rd and 4th slot is reading the memory but 1st and 2nd are not using the memory. What would cause this?

alexoiu · Nov 5, 2013

A bent pin could cause this kind of issues. Try reseating the CPU. If no bent pins, then test the board outside the case for ruling out a short.

FatHitman · Nov 5, 2013

Is there any problems visible in this?

Chipset
-------------------------------------------------------------------------

Northbridge Intel DMI Host Bridge rev. 11
Southbridge Intel P55 rev. 06
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR3
Memory Size 8 GBytes
Channels Dual
Memory Frequency 752.6 MHz (2:10)
CAS# latency (CL) 9.0
RAS# to CAS# delay (tRCD) 10
RAS# Precharge (tRP) 10
Cycle Time (tRAS) 28
Row Refresh Cycle Time (tRFC) 83
Command Rate (CR) 2T
Uncore Frequency 2709.2 MHz

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

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) A-Data Technology (7F7F7F7FCB000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number DDR3 1600G
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 6.0-6-6-17-23 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 MHz

DIMM # 2
SMBus address 0x51
Memory type DDR3
Module format UDIMM
Manufacturer (ID) A-Data Technology (7F7F7F7FCB000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number DDR3 1600G
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 6.0-6-6-17-23 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 MHz

DIMM # 3
SMBus address 0x52
Memory type DDR3
Module format UDIMM
Manufacturer (ID) A-Data Technology (7F7F7F7FCB000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number DDR3 1600G
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 6.0-6-6-17-23 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 MHz

DIMM # 4
SMBus address 0x53
Memory type DDR3
Module format UDIMM
Manufacturer (ID) A-Data Technology (7F7F7F7FCB000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number DDR3 1600G
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 6.0-6-6-17-23 @ 457 MHz
JEDEC #2 7.0-7-7-20-27 @ 533 MHz
JEDEC #3 8.0-8-8-22-30 @ 609 MHz
JEDEC #4 9.0-9-9-25-34 @ 685 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 02 11 00 09 03 52 01 08 0C 00 3C 00
10 69 78 69 30 69 11 20 89 70 03 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 CB 00 00 00 00 00 00 00 B5 26
80 44 44 52 33 20 31 36 30 30 47 20 20 20 20 20 20
90 20 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 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 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 02 11 00 09 03 52 01 08 0C 00 3C 00
10 69 78 69 30 69 11 20 89 70 03 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 CB 00 00 00 00 00 00 00 B5 26
80 44 44 52 33 20 31 36 30 30 47 20 20 20 20 20 20
90 20 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 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 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 02 11 00 09 03 52 01 08 0C 00 3C 00
10 69 78 69 30 69 11 20 89 70 03 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 CB 00 00 00 00 00 00 00 B5 26
80 44 44 52 33 20 31 36 30 30 47 20 20 20 20 20 20
90 20 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 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 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 02 11 00 09 03 52 01 08 0C 00 3C 00
10 69 78 69 30 69 11 20 89 70 03 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 CB 00 00 00 00 00 00 00 B5 26
80 44 44 52 33 20 31 36 30 30 47 20 20 20 20 20 20
90 20 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 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 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

FatHitman · Nov 5, 2013

alexoiu :

I'm looking at the manual for this board and it says "Due to intel spec definition, X.M.P DIMMs and DDR3-1600 are supported for one DIMM per channel."

Could that have something to do with it?

alexoiu · Nov 5, 2013

But you're running them at 1333, right?

FatHitman · Nov 5, 2013

I have tried running them from 1333-1800

8gb installed - 4 gb usable, Win 7 64bit Help

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