GA-P55-UD6 Memory issue

[jedyed]

I have installed 2x2GB OCZ DDR3 OCZ3G1866LV4GK on this board running Windows7 64bit which boots ok and is usable but

Under M.I.T Current Status- Dimm Slot 1 and 4 show 2048 but under Enabled Slot only Slot 1 is showing 2048. So the system seems to be only using half the installed memory.

Have I missed a setting in the bios to enable all the memory to be used?

[stasio]

Re: GA-P55-UD6 Memory issue

No,you didn't missing setting in the BIOS to enable dual channel.
Are you using latest BIOS F5d?
Overclock or not?
What is your RAM setting in BIOS?

[jedyed]

Re: GA-P55-UD6 Memory issue

These are current settings. I have, since last post, swopped the 'sticks' around (Slot1 and Slot4) without success. Slot4 is still not recognized in BIOS

GA-P55-UD6 BIOS F5d

Advanced Frequency Settings:

CPU Clock Ratio 20x

Advanced Core Features [Press Enter]:

Intel(R) Turbo Boost Tech. [Enabled]
CPU Cores Enabled [All]
CPU Multi-Threading [Auto]
CPU Enhanced Halt (C1E) [Auto]
C3/C6/C7 State Support [Auto]
CPU Thermal Monitor [Auto]
CPU EIST Function [Auto]
Bi-Directional PROCHOT [Auto]

QPI Clock Ratio [Auto]

QPI Link Speed 4.8GHz
Uncore Clock Ratio 16x
Uncore Frequency 2133MHz

>>>>> Standard Clock Control <<<<<

Base Clock (BCLK) Control [Disabled]
BCLK Frequency [133]
System Memory Multiplier (SPD) [Auto]
Memory Frequency (MHz) 1066 1066
PCI Express Frequency (MHz) [Auto]
C.I.A.2 [Disabled]

>>>>> Advanced Clock Control <<<<<

CPU Clock Drive [ 800mV]
PCI Express Clock Drive [ 900mV]
CPU Clock Skew [ 0ps]

Advanced Memory Settings:

System Memory Multiplier (SPD) [Auto]
Memory Frequency (MHz) 1066 1066
Performance Enhance (SPD) [Turbo]
DRAM Timing Selectable (SPD) [Autot]
Profile DDR Voltage 1.5v
Profile QPI Voltage 1.1v
Channel Interleaving 6 [Auto]
Rank Interleaving 4 [Auto]

>>>>> Channel A

Channel A Timing Settings [Press Enter]:
Cas Latency Time 9 [7]
tRCD 9 [7]
tRP 9 [7]
tRAS 24 [16]

>>>>> Channel A Advanced Timing Control

tRC 27 [Auto]
tRRD 4 [Auto]
tWTR 4 [Auto]
tWR 8 [Auto]
tWTP 19 [Auto]
tWL 7 [Auto]
tRFC 60 [Auto]
tRTP 4 [Auto]
tFAW 16 [Auto]
Command Rate (CMD) 1 [Auto]

>>>>> Channel A Misc Timing Control

B2B Cas Delay - [Auto]
Round Trip Latency 47 [Auto]

Channel A Turnaround Settings [Press Enter]:
Different DIMMs 6 [Auto]
Different DIMMs 5 [Auto]
On The Same Rank 1 [Auto]

>>>>> Channel A Writes Followed By Writes

Different DIMMs 6 [Auto]
Different DIMMs 6 [Auto]
On The Same Rank 1 [Auto]

***>>>>> Channel B

Channel B Timing Settings [Press Enter]:
Cas Latency Time 9 [-] Auto
tRCD 9 [-] Auto
tRP 9 [-] Auto
tRAS 24 [-] Auto

>>>>> Channel B Advanced Timing Control

tRC - [Auto]
tRRD - [Auto]
tWTR - [Auto]
tWR - [Auto]
tWTP - [Auto]
tWL - [Auto]
tRFC - [Auto]
tRTP - [Auto]
tFAW - [Auto]
Command Rate (CMD) - [Auto]

>>>>> Channel B Misc Timing Control

B2B Cas Delay - [Auto]
Round Trip Latency - [Auto]

Channel B Turnaround Settings [Press Enter]:
Different DIMMs 6 [Auto]
Different DIMMs 5 [Auto]
On The Same Rank 1 [Auto]

>>>>> Channel B Writes Followed By Writes

Different DIMMs 6 [Auto]
Different DIMMs 6 [Auto]
On The Same Rank 1 [Auto]

Advanced Voltage Settings:

******Mother Board Voltage Control ******
Voltage Types............Normal......Current
--------------------------------------------

>>> CPU
Load Line Calibration................[Standard]
CPU Vcore..................1.26250v..[Auto]
QPI/VTT Voltage...........1.100v.....[Auto]
>>> MCH/ICH
PCH Core....................1.050v.....[Auto]
CPU PLL......................1.800v....[Auto]
>>> DRAM
DRAM Voltage..............1.500v.....[Auto]
DRAM Termination..........0.750v.....[Auto]
Ch-A Data VRef............0.750v.....[Auto]
Ch-A Data VRef............0.750v.....[Auto]
Ch-B Data VRef............0.750v.....[Auto]
Ch-B Data VRef............0.750v.....[Auto]

Miscellaneous Settings:

Isochronous Support...................[Enabled]
Virtualisation technology.............[Enabled]





-----------------------------------------------
GA-P55-UD6, Core i5-750 @ 2.66GHz
OCZ 2x2GB PC3-15000-C10 @ 1866MHz 10-10-10-27
XFX HD4770, 1xWD SATAII 80GB 1xHitachi SATAII 160GB
Windows 7x64bit

[yshuwen521]

Re: GA-P55-UD6 Memory issue

How about your total memory size under MIT and MIT current status?
Have you to checked the total memory size in Win7?
maybe you should try to plug one stick of memory on Dimm 1 and checked if it can be recognized under MIT and MIT current status.
then test another stick.

[stasio]

Re: GA-P55-UD6 Memory issue

jedyed,I send you PM.

[jayj]

Re: GA-P55-UD6 Memory issue

Did you solve your problem?
I just bought a P55-UD6 board with i5 750 CPU.
I also have memory problems
I put 4*2GB DDR3 1333 Kingston RAMS and both bios and windows see it as 4GB
The seller tested 3*2GB DDR3 1600 Rams and still the same only 4GB
Is there some kind of a setting to be made in BIOS?

[warren300]

Re: GA-P55-UD6 Memory issue

no need to set anything in bios,it will automatically detect dual/tri channel...thats how it is for ex58 boards i cantsee p55 boards being any different,please read your manual tho and makesure your installing it in the correct slots normally the white slots

[jayj]

Re: GA-P55-UD6 Memory issue

there are 6 slots
the manual says:
for two modules install in 1 and 4
for four modeuls install in 1,2,4,5 or 1,3,4,6 (ı tried both and does not recognize 2 of the 4 modules)
for six modules 1,4 Double sided modules, 2,3,5,6 single sided
that's all

apparently it does not say anything about 3 modules, and when I put 3 modules it again recognzies only 2 modules
I sent the board to the seller and they will try with another p55-ud6, maybe this one is defected?

[warren300]

Re: GA-P55-UD6 Memory issue

you could have a faulty ram slot,you can only use dual channel in p55,the way to test if its faulty slot or module is to just put one stick in the slot start with slot#1 and go through each slot,if its working it will boot into windows from any slot with just one stick.....are you usig a 32bit os?? or 64 bit?? mvn i read your sig

[Lsdmeasap]

Re: GA-P55-UD6 Memory issue

This could also be caused by bent pins, uneven CPU heatsink mounting, or incorrect QPI/Vtt and ram voltages.

Have you guys checked your pins?

QPI may need 1.25-1.35+ depending on ram timings-speed/uncore speed/QPI speeds. You will also need to set your ram voltage to 1.66V

Also, when you guys are checking the slots bynumber, be sure you are using the numbers labeled on the PCB and not going by slot number from the CPU outwards.

[Fabian Suarez]

Re: GA-P55-UD6 Memory issue

stasio, i have the same problem. Can you help me?