was it a G0 though that you tried to push to 3.6? Also X38/P45/x48 are your best Quad overclocking chipsets, P965/P975 where almost as bad as 680i in overclocking quads

Yes, both G0. Some CPU simply are poor overclockers, no matter what you do.

havli wrote:

Old... maybe but this board can do 450 MHz FSB with dual cores, so 400 MHz @ C2Q should be doable as well. Anyway I think GA-P35-DS3 wasn't any better running this particular Q6600 last time i tried.
The other Q6600 (3.5GHz one) was running X38 Maximus Formula board. Actually most of my 775 CPUs are sub-average overclockers... except maybe 3.8 GHz E6600. Just a bad luck 😵

Not just doable but I have done it pushing a crappy Q8200 to 3.2ghz on a xfx 780i (7x 457), I agree that some are dodgy overclockers as I once had a T7200 that was unstable at a very meh clock despite having tried everything I could to push it any further.

I've always used P35 chipset boards for overclocking. The MSI P35 NEO2 FiR is a beast when it comes to OC (it was my board back in the day). The Asus P5K64 WS isn't too shabby either, but it's not very reliable. X38 / x48 boards are pretty rare and expensive (even now). Most people are asking 50-80$ for a x48 board, and frankly for that money I'd rather get a high end AM3 board like the Asrock Fatal1ty 990FX Professional and stick a Phenom II x4 or X6 in there. Phenom II CPUs are 7 to 20% faster then the Core series CPUs (depending on benchmark / app), they overclock very well and have overall better temps. Not to mention some boards come with USB 3.0 and SATA3. I have friend who still uses a Phenom II x6 1090T on a Asus SABERTOOTH 990FX running at 4.5GHz. The board is a great overclocker, and has both USB 3.0 and SATA3, and is windows XP compatible.

As for me, I'll look into one of the faster LGA775 xeons, and after I can afford to finish my guest gaming rig, I'll swap the XP rig's motherboard for a MSI P35 diamond or a DFI P35 T3R or Lanparty UT.

This is the board the machine currently uses (stock photo).

And this is one of my favorite P35 boards of all time - the MSI P35 Diamond:

I own that ASUS board, and I got Pentium XE 965 to 4,82GHz and QX6700 to 3,62GHz, and QX9770 to 4,27GHz, with it 😀
I think it's a good/solid board that has it's quirks.

I've managed to get the Q6600 to 3.3GHz @ 1.35v - it's stable and has good temps. It does 3.6 @ 1.4v, but it get pretty hot (68-69C). The GTX 280 in it also gets really hot, so I think for now I'll stick with 3.3GHz. 3.6 is manageable if I set the fan to 80-90% (65C), but the Tuniq 120 makes a lot of noise at that speed so I'll pass. I tried replacing the fan, but the quieter fan (120mm noctua) spins a lot slower and temps go trough the roof. Plus I'm afraid I'll pop the FETs on the mainboard again...

Oh yeah, I think my quad is a B3 stepping.

To me 68-69C isn't hot, 80C is 😀
How do you measure temperature, CoreTemp, AIDA64 ?

I agree, anything below 70 celcius is perfect for a qore2quad at 100% load. They do get that warm at stock clocks with stock coolers.

agent_x007 wrote:

To me 68-69C isn't hot, 80C is 😀
How do you measure temperature, CoreTemp, AIDA64 ?

HWinfo64

@kanevcr
I really liked the Asus P5KC (P35, DDR2 and DDR3) 😎
It's sad mine doesn't boot anymore...

Now I am using a P45 board. It is much easier to set higher FSBs with it 😀

Arctic wrote:

@kanevcr I really liked the Asus P5KC (P35, DDR2 and DDR3) :cool: It's sad mine doesn't boot anymore... […]
Show full quote

@kanevcr
I really liked the Asus P5KC (P35, DDR2 and DDR3) 😎
It's sad mine doesn't boot anymore...

Now I am using a P45 board. It is much easier to set higher FSBs with it 😀

One of the mosfets probably died - that's what happened to my P5K64 WS. At first I replaced the dead one, but two more died and I replaced all of them. The board works now, but it won't read CPU voltage correctly (but it does read independent core voltages).