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RAM only posting 4gb instead of 6 some of the time

Last response: in Overclocking
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December 3, 2010 3:13:01 AM

I have my i7 overclocked to 4ghz and everything is stable...only problem is sometimes when I boot I only get 4gb of ram recognized instead of 6
the only way it seems to get the system to recognize the ram again is to completely unplug the system (so the MOBO loses power) and then boot it up again

here is some information for cpuz. any ideas would help a lot.
I have the most recent BIOS and driver to my knowledge

Processors Information
-------------------------------------------------------------------------

Processor 1 ID = 0
Number of cores 4 (max 8)
Number of threads 8 (max 16)
Name Intel Core i7 950
Codename Bloomfield
Specification Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz
Package (platform ID) Socket 1366 LGA (0x1)
CPUID 6.A.5
Extended CPUID 6.1A
Core Stepping D0
Technology 45 nm
Core Speed 4015.7 MHz
Multiplier x FSB 19.0 x 211.4 MHz
Rated Bus speed 3804.3 MHz
Stock frequency 3066 MHz
Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, EM64T, VT-x
L1 Data cache 4 x 32 KBytes, 8-way set associative, 64-byte line size
L1 Instruction cache 4 x 32 KBytes, 4-way set associative, 64-byte line size
L2 cache 4 x 256 KBytes, 8-way set associative, 64-byte line size
L3 cache 8 MBytes, 16-way set associative, 64-byte line size
FID/VID Control yes

Turbo Mode supported, disabled
Max turbo frequency 3333 MHz
Max non-turbo ratio 23x
Max turbo ratio 25x
Max efficiency ratio 12x
TDP Limit 130 Watts
TDC Limit 110 Amps
Core TDP 110 Watts
Uncore TDP 20 Watts
Power @ 12x 35 Watts
Power @ 13x 39 Watts
Power @ 14x 44 Watts
Power @ 15x 50 Watts
Power @ 16x 57 Watts
Power @ 17x 64 Watts
Power @ 18x 72 Watts
Power @ 19x 82 Watts
Power @ 20x 92 Watts
Power @ 21x 103 Watts
Power @ 22x 116 Watts
Power @ 23x 130 Watts
Max bus number 255
Attached device PCI device at bus 255, device 2, function 1
Attached device PCI device at bus 255, device 3, function 4

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

DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Mushkin (7F7F7F9400000000)
Size 2048 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number 991805 (998805)
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.2
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-22 @ 444 MHz
JEDEC #2 8.0-8-8-22-30 @ 592 MHz
JEDEC #3 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-1600
Specification PC3-12800
Voltage level 1.650 Volts
Min Cycle time 1.250 ns (800 MHz)
Min tRP 7.50 ns
Min tRCD 10.00 ns
Min tWR 12.50 ns
Min tRAS 30.00 ns
Min tRC 37.50 ns
Min tRFC 90.00 ns
Min tRTP 7.50 ns
Min tRRD 5.00 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-8-6-24-30-0T @ 800 MHz (1.650 Volts)

DIMM # 2
SMBus address 0x52
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Mushkin (7F7F7F9400000000)
Size 2048 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number 991805 (998805)
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.2
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-22 @ 444 MHz
JEDEC #2 8.0-8-8-22-30 @ 592 MHz
JEDEC #3 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-1600
Specification PC3-12800
Voltage level 1.650 Volts
Min Cycle time 1.250 ns (800 MHz)
Min tRP 7.50 ns
Min tRCD 10.00 ns
Min tWR 12.50 ns
Min tRAS 30.00 ns
Min tRC 37.50 ns
Min tRFC 90.00 ns
Min tRTP 7.50 ns
Min tRRD 5.00 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-8-6-24-30-0T @ 800 MHz (1.650 Volts)

DIMM # 3
SMBus address 0x54
Memory type DDR3
Module format UDIMM
Manufacturer (ID) Mushkin (7F7F7F9400000000)
Size 2048 MBytes
Max bandwidth PC3-10700H (667 MHz)
Part number 991805 (998805)
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP yes
XMP revision 1.2
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 6.0-6-6-16-22 @ 444 MHz
JEDEC #2 8.0-8-8-22-30 @ 592 MHz
JEDEC #3 9.0-9-9-24-33 @ 666 MHz
XMP profile XMP-1600
Specification PC3-12800
Voltage level 1.650 Volts
Min Cycle time 1.250 ns (800 MHz)
Min tRP 7.50 ns
Min tRCD 10.00 ns
Min tWR 12.50 ns
Min tRAS 30.00 ns
Min tRC 37.50 ns
Min tRFC 90.00 ns
Min tRTP 7.50 ns
Min tRRD 5.00 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 6.0-8-6-24-30-0T @ 800 MHz (1.650 Volts)

More about : ram posting 4gb time

December 3, 2010 3:22:57 AM

The only thing I can think of is maybe you bent some of the pins when you put your cpu in the slot. I hear the ram controllers on core I series compatible mobos are on those little pins where the cpu goes.

Maybe you can take out the cpu and see if any are bent, if so maybe get some tweezers and pull them up. Sorry only thing I can think of.
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a c 241 K Overclocking
December 3, 2010 4:30:13 AM

9-9-9-24-33 cannot boot try set mode RAM in bios opt. BOTH set 9-9-9-27-40 !

RAM-10700H (667 MHz) dual to 1333 (3:10) have limited Max bandwidth,
in clock 4Ghz u should go down ratio your RAM to 1066 (3:8) it can get high bandwith & Low Latency.
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December 3, 2010 12:26:54 PM

The odd thing is the RAM past all the sability tests i could throw at it, i figured if the problem was hardware at all it could act funny. I'm not sure I understand the settings I should try adjusting on the ram from above, its currently running slightly overclocked, but was stable when I tested it 2 weeks ago.
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Best solution

a c 100 K Overclocking
December 3, 2010 2:08:41 PM

Could be the 0.5V rule... the VTT/IMC/QPI voltage should be <0.5V different than RAM voltage. So 1.65V RAM, VTT should be no less than 1.15V.

http://forums.clubrsx.com/showthread.php?t=747969

So maybe try putting a little more voltage into that.
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December 3, 2010 5:25:57 PM

i had the QPI set to 1.35 but I did not have over volting enabled so I gave that a shot. set to auto my ram wanted to go to 9-9-9-24-72 at 1691 or w/e
i have since manually set the timings to 6-8-6-24-60 and i'm currently running occt to give the sytem a bit of a test. the memory is rated at 6-8-6-24-30 at 1600
i'm not sure i really understand what tRAC or whatever the 5th number is i know lower is better but i'm not sure if I should really care.

after 5 reboots and 4 cold boots it still recegnized the RAM so maybe problem solved but jury is still out.

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a c 241 K Overclocking
December 4, 2010 1:10:09 AM

what is massage your BSOD..?
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December 6, 2010 12:02:34 PM

Best answer selected by Nubiatem.
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December 6, 2010 12:04:32 PM

No BSOD just not getting 6 gigs of ram some of the time. I enabled over voltage on the board I guess even though it let me set the QPI to 1.35 it would not allow that much without over voltage enabled. So far its recignized all my ram for around 20 boots in a row so I think the problem is solved. Thanks All!
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!