Bluescreen Windows 7 64-bit. 8GB RAM

[sebadigri]

Model of the motherboard: GA-P55A-UD3P REV 1.0 (F14 BIOS latest).
Model of the memory: F3-10600CL9D-4GBNT (x2, 4x2GB=8GB)
Model of the CPU: Intel i5 750.

Memtest are like ok...8 hours passed with no errors, 5 passes 0 errors....Reboot, and bluescreen again. Sometimes boot well after changing something in the BIOS, but after a reboot, it goes bad again.

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This week i bought 2x4GB 1333Mhz CL9 Sniper memory. I had this problem so i decided to change it for 4x2GB (F3-10600CL9D-4GBNT).

Now i have the same problems with these memories....

I tried a lot of combinations (Optimized defaults, Bios version downgrade, etc etc).


Sometimes my PC boots after clearing cmos or something but after 1 or 2 reboots PC start to fail again.


Previously memory config was 2x2GB CL8 1333mhz S****Talent and they went fine (tried lot of configs with previous memories 10x133, 8x166 (my 24/7 config) even i tried 10x166 with no problems...), so i dont know whats going on right now...i cant do a 10x133 Regular Clock...without having a bluescreen...



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I need help right now..i dont know what to do......

[sebadigri]

Trying to go back to 4GB of ram. If that solves my problem i will stay with 4gb...


EDIT: I think (the "I think"Number 53) i finally solved this...going back to 4GB of ram.

[Tradesman]

Which Snipers do you have the 2x4GB 1.5 or 1.25 set, regardless, set the DRAM voltage of the set you have and the base timings on the package/sticks, set the CR (Command Rate) to 2T (or 2N if it uses the N) and give it a try

[sebadigri]

Sorry, i don-t have the snipers anymore, i changed them because i tought they were the main problem.

It was the 1.5v model.


Now i only have the Four 2GB Sticks (F3-10600CL9D-4GBNT). Removing 2 sticks (and keeping 4GB) i think is working pretty good (like my old ddr3)...(trying to install a windows right now, maybe without bluescreen). At least my main partition booted well many reboots.

I think that the main problem is that my Motherboard doesn't really support 8GB of ram without problems... In the manual says that support 16GB...but tried with these 2 configs with a lot of bluescreens. but who knows..it also says...SATA3 Support and it was like a lie....because the sata3 channel is slower than the intel sata2 integrated to chipset channel....

Also if i google "Windows 7 8gb bluescreen" i see a huge amount of people with the same problems i have.

[Tradesman]

With 4 sticks may have to increase voltage to DRAM and to the MC (memory controller

[sebadigri]

Memory controller = QPI voltage? I set the QPI to 1.34v aprox and still with problems

for the ram..DDR says about 1.56v in the PC & Health status.



Do i need more than 1.5v in ram? never tried go for instance 1.65v with these 4 sticks. Is not enough for 4 non dissipated sticks?

[sebadigri]

With 4 sticks may have to increase voltage to DRAM and to the MC (memory controller

When i use only 1 channel (4GB) i think some parameters change, for example "command rate" now is set 1T.

But when i had 2 channels (4 sticks, 8GB) i think i had Command rate "2T".

timings, etc are used to change with more memory capacity or more sticks?

[Tradesman]

Combination of the two, the 1T CR offers better performance but 2T is less stress on the MC