DFI Lanparty LT P35 T2R

[nicuwork]

Hi guys, i'm having a problem adding more ram to my computer.

MB dfi lanparty lt p35-t2r
CPU Q9400 (3.4 Ghz OC, fsb 425x8) voltage 1.25v.
2x2gb ddr2 1066 kingston hyperx (851 mhz, ratio 1:1)
PSU antec HE NeoPower 550w
2 hdd (raid 0) + 1 single sata
Also MB has some jumpers that allow you to switch between 800/1066/1333 FSB and i have it on 1333 now

I want to add 2 ore 4 more gb or ram but i just can't make it boot ...
I use windows 8.1 and it always reboot when the windows logo appears ...at this stage it reboots.

Anyone have experience with P35 chipset ? is this the problem or the procesor ...
If anyone can suggest anything....i'm open to try

 

[nicuwork]

I was reading some forums, and some people say that standard voltage for DDR2 is 1.8v
Alot of them say that, filling all 4 slots of ram, require voltage increase, and set the slowest timing of all sticks, but i was never good at changing ram timings....
So i guess i have these 2 options for when i go home....voltage and timing +nb voltage increase.

 

[nicuwork]

i manage to get 4 sticks of ram afterall, raising voltage to northbridge 1.62v and ram voltage to 2.3v, and lowering overclock of CPU from 3.4 to 3.0ghz, but there is no difference in games because i use a hd7790 amd card...and it's the slowest component from the PC.

 

[996GT2]

2.3V is quite high for DDR2...

 

[nicuwork]

yes, 2.3 it's high voltage, and it's absolutely no difference in games.
I saw a small difference though in After Effects, and AdobePremierePro CS6.
Because of high voltage...and small latency of ram, i was forced to put timers more slow and all applications seems to open slower...so i decided to just stay with 2x2 gb ddr2 ...and things are quite good and enough using win8 /64