Hello fellow OCers, I have encountered a new problem regarding my OC issues recently after i added in an extra 2GB worth of Corsair Ram. Bare with me please, im still in the learning process. This is how my stories goes.

Before i added in my RAM, my OC settings were stable and fine. The hardware i am using is as follow:

RAM: First 2GB is 800mhz Corsair Twin2x 6400 XMS2
The latest 2GB of ram i added is 800mhz Corsair Twin2x 6400 XMS2 CL4
CPU: Core 2 Duo e6400
Mobo: Gigabyte GA-965P-DS3

My original settings before i added the new rams are as follow:

CPU Clock Ratio at 8x
CPU Host Frequench (FSB) at 400
PCI Express Frequency at 100MHz
System Memory Multiplier at 2.00
DRAM Timing at 5-5-5-15
DDR2 OverVoltage Control at Normal
FSB OverVoltage at Normal
(G)MCH Voltage at Normal
CPU Voltage at 1.22500V

Before adding the new 2GB Corsair rams, this settings for the Bios is stable and fine. Unfortunately after i added the new 2GB worth of ram, i get BSOD after a few minutes in Windows. I think this is probably caused by undervoltage. Oh ya, forgot to mention the 800mhz Corsair Twin2x 6400 XMS2 CL4 has this PPE function thing.

Hope some people can help me with my problem, thanks.

This post has been edited by CyberTroop: Oct 25 2008, 11:17 AM

try set manually ur vdimm to 1.8~1.9v.. dont leave it to auto..some mobo at auto setting will supply only 1.7~1.75v..

Try to add +.1 vdimm?

Gigabye DS3 mobo DDR2 voltage default is at 1.8v. I've tried adding +0.3V, which makes it 2.1V... Unfortunately still encounter the same problem

Try loosen the timing's for the ram, you previously using 1GB X 2 right? then you add another 1GB x 2?

Heard 4 stick of ram is harder to oc then 2 stick

Yeah, my first one is 1GB x2, then i add another 1GB x2...

When you say harder to OC, means in what way its harder?

Thanks.

Try 1.9v and 2v first
If cannot,add +.1v chipset voltage and give some feedback

Would you mind telling me which is chipset voltage... I'm using a gigabyte ds3 mobo

(G)MCH Voltage at Normal <<< dis one u modify it make it +0.1V. dis is ur northbridge voltage.

i u hv an EP35-DS3, if u set ur DDR2 overvoltage at normal.ur pc health there detects as 1.92V (Performance Enchance option=standard).BUT, if u modify ur Performance Enchance option to Extreme, ur DDR2 voltage will be at 2.1V like dat even though DDR overvoltage at normal. (dis is tested wif 2 sticks of 2gb ram per stick.)

u din state clearly wat gigabyte DS3. got p35-ds3, got 965-DS3, got EP35-DS3. which model???
but normally 4 sticks harder to OC coz u put more load to ur memory controller( at ur northbridge,so u bump a little volts at it might help).

This post has been edited by k!nex: Oct 25 2008, 05:40 AM

Oh sorry my bad, my mobo is Gigabyte GA-965P-DS3

hhmm... shouldn't be a problem from my past experience. I've also used 2 sets of different RAM.

2x 1gb hyperx PC2-6400
2x 1gb hyperx PC2-9200 D9GKX

yet everything went fine and stable. the D9 was added later FYI.
I always thought that as long as you can get the setting right within the capability of your ram in the BIOS, then everything should be fine?

I was running my rig (X38-ds5) @ 450mhz cl4-4-4-15 on the ram with rock solid stability. Coz i know that the 6400 hyperx can go from 400 to 450 without sweat, and later added the D9GKX with all the setting unchanged, without any problem (duh ).

Your new ram is definitely a better one compare to your old one from what i can see. but if i were u in your shoes, i would have expected it to work. and also since u mentioned that u have raised the voltage of your ram and it still didn't work. could it be the new ram's fault??

Simple suggestion, pull out your old ram and start your rig with ONLY your new ram. and see how it goes??

not true..

i have been doing that for years on multiple boards..

TS.. i think its a JDEC conflict...

also are u running the right pairs in the right dimms..

this is why u should always buy the same chipset.. like max last 10 digit serial off both pairs.. to ensure compatibility.

meaning buy one shot 4x1gb..

its a gaygay mobo right.. gaygay sometimes changes read ure manual and make sure its the right channels..


This post has been edited by cstkl1: Oct 25 2008, 03:52 PM

you mean the dimm slots right? good thinking, never thought of that
that's why i think it is also a good idea to test the pair seperately to ensure they are not faulty at least.

If i'm using a gay mobo? does that make me a homosexual?

This post has been edited by metsatsu: Oct 25 2008, 03:59 PM

Exactly, my goals were to buy the exact same sets of Ram. Unfortunately, they didn't have that pair of ram in stock.

So i bought the C4 version... Dunno whats the difference. Here's what it write on the price tag.

Original : TWIN2X2048-6400
New: TWIN2x2048-6400C4

its just a chipset issue..

so when u run in the correct dimms.. if the JDEC ( aka SPD timings at 1.8)
if the 800mhz CL5 is not rated at 1.8v then the next step the mobo will take is 667mhz CL5...to ensure computability.

dude i hope ure testing this in a non overclock settings first...

run first pair and second pair later look at the CPUZ SPD timings...

This is what my timings and voltage looks like in a Non OC Environment.

Another thing, the RAM works perfectly fine if i don't OC anything.

why dun u try oc'ing with just the new ram, and see how it goes?