Am I pushing this mobo too hard? GA-P35-DS3R

[chiller]

Hi all,

I have a ga-p35-ds3r rev 1.0 motherboard with a Q6600 and am currently overclocking to 3.0 ghz with no issues. If I try to clock higher, to 3.3ghz, for example the machine becomes unstable ... tends to reboot after an hour of use. Gigabyte's website state this mobo has a maximum FSB of 1333 so clocking my cpu to 3.3 takes the FSB to 1464, am I pushing it or should I get away with this overclock?

CPU maximum temp is 61-62 with prime95 and ATITool running so I do not think it is a temp problem (Run ATITool to work the graphics card) Has anyone had experience of this mobo, specifically rev 1.0 and overclocking? I have used a better h/s and fan for the NorthBridge as it was getting quite hot. I set my vcore in the bios to 1.375 when clocking to 3.3ghz but CPUZ reports the vcore to be 1.268 to 1.280, is this normal or VDroop?


Any ideas would be greatly appreciated


Mob Gigabyte GA-P35-DS3R rev 1.0
4x 1GB Patriot pc6400
Zotac 8800GT amped
Q6600 G0
Audigy 2
Seagate Barracuda 300GB
colorsit 550w power supply
Windows XP SP3

 

[JDocs]

Force your voltages a bit. The difference between your vCore and what your getting is called vDroop(quite normal). For 3ghz to be dead stable the chip should be getting 1.3 volts after vDroop.

 

[chiller]

Thanks JDocs,

I am not having an issue with 3ghz, it is when I try 3.3ghz. So you think I can take CPUZ readings as the correct ones?

 

[JDocs]

Personally I don't really trust CPU-Z. I've seen some cases where its insanely wrong however most programs are quite accurate. Try something like CoreTemp, RealTemp or SpeedFan. I'm not 100% sure but I think they all do vCore readings. I know SpeedFan does and its easy to find, bottom left corner there is normally a vCore read out.

 

[darkdragon]

The P35 DS3 can handle 1600 FSB easily with +0.1V to fsb.
It is most likely your CPU requires more voltage at 3.3ghz.

 

[chiller]

Thanks guys,

darkdgragon I am talking about a rev 1.0 board which Gigabyte say will support upto 1333 (the rev 2 board does 1600 OC according to their website) so if I try to do 3.3 ghz then the mobo is running at 1464, am I right regarding this?

 

[RJR]

The max fsb the board can do is more than what is stated by the manufacturer. I have an Asus P5KC (P35) that is rated to 1600 Fsb and is currently running at 2000 with just one bump up on the NB voltage. 1464 on your board should be no problem at all.

 

[chiller]

Thanks for the help guys,

I have upped the FSB and NB by 0.1v and seem to be running pretty stable at 3.3ghz so far (need more testing) CPU with Prime95 hits 61-62 max and 70 for GPU in ATITool .. vcore still reporting 1.268-1.28 in speedfan and CPU-Z under load, 1.31 when idle - set at 1.375 in bios. I have noticed that after 10-15 minutes of testing I can hear a low whistling sound coming from the power supply, switch off Prime95 and it stops instantly .... should I be concerned?

The power supply is not great .. a 4 year old colorsit 550w with 30a on a single 12v rail. I was thinking of getting a Corsair 650tx soon, I have read they are pretty good.

Any thoughts welcome