Just wondering what settings you guys were using to OC your new chips. the Q9450 oc up to 3.8 with no other adjustments besides setting the fsb and everything else on auto.
for 3.95, i had vcore - 1.4, vtt - 1.6, pll -1.6, nb -1.7, sb 1.6
really happy with the chip so far. i'm sure it will hit over 4GHz easily, just don't want to push the voltages much more. advice is greatly appreciated.
thanks, what settings did you use to get 500? the chip hits 3.8 in a blink and i haven't even crossed 1.4vcore. just trying to get the board stable above 500 as i feel the quad has a lot more to offer
Well, it required 1.45v vCore, 1.5v VTT, 1.6v PLL, and 1.7v NB. I couldn't do much aside from doing a quick SuperPI 1M and a validate link.
3.80GHz requires 1.344v idle and 1.312v load for me. It's rock solid from then on at 3.80GHz, though, so I guess this is my golden state.
thanks, i'm running smoothly 3.9 at 1.36vcore right now. i have to get my NB under water tomorrow and then i'll feel more comfortable with giving it more juice.
i'll give your settings a quick look tonight though, thank you RP.
Those volts esp. 1.6 vtt seem pretty high for 45nm.
That seems to be the problem with these quad 45nm chips. The need for relatively low vcore (mine needed 1.298 to be 3.6GHz P95 small ffts) but a ton of NB and VTT to get it blend stable.
Mmm... I was just wondering. RAID, could you try to manually select your voltages and see what would make 3.80GHz stable? 1.6v VTT seems very high to me, and I hope your board is not defaulting (or automating) to that.
That seems to be the problem with these quad 45nm chips. The need for relatively low vcore (mine needed 1.298 to be 3.6GHz P95 small ffts) but a ton of NB and VTT to get it blend stable.
So is that a function of the P35 chipset? Anyone using an X38/48-based board w/ these 45nm quads? Do they require the high NB and VTT like sofarfrome has reported?
Hmm... I don't know if my input is relevant to your question, but I'm using G35 here, and the only high voltage I need for the chip to be stable is vNB.
@deraphi - cool, so you're using the LT x48-t2r... even though there isn't official x3350 support in the BIOS, it's obviously working for you. What kinda numbers are you running w/ it besides 8x450? Also, is it p95 stable @ 3.6 GHz? What kinda voltages is needed and what kinda motherboard and CPU temps are you getting?
Finally, how do you like the MB? I was thinking about it but $270 is kinda expensive... I was gonna get the LT P35 version for $170.
I needed 1.6 CPU VTT and 1.6NB for 3.6ghz stable prime blend with my x3350(q9450) using a X48-T2R.
I didn't want to run so much voltage through it, so i bumped it to 3.5ghz which only required 1.43CPU VTT and 1.43 NB
Ive been reading however that 450FSB to 460FSB has issues, and 461 FSB and higher might be able to do better than 450, I might test that a little later.
Also, I haven't played seriously with GTL settings either yet. I need some more research to be done before I tackle that one.
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Mmm... did you guys ever try... backing down the VTT and the vPLL? I think 1.6 VTT is just too overkill. Without any GTL modification (I don't even have the option to), it just requires me 1.32v VTT for 3.80GHz stable. Are you sure... that that's necessary?
Don't some boards (DFI P35, IIRC) have a feature that detects if you're using a 45nm cpu and, if so, lowers the stock VTT to 1.1 and caps the max at 1.5?
I can get mine to 3.9, but right now I am getting a rounding error on one of the cores at 1 hour and 20 minutes of small fft @ 3.8 ghz.
My voltages are:
CPU 1.43 Actual 1.37
FSB 1.35
Memory 2.0
SPP 1.45
MCP 1.55
Any recommendations. I may need to bump up the VCORE.
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I am currently running it on P5K-Dlx at 3.6GHz (FSB=450).
Still trying to get it higher but not succeed yet. OCCT failed at FSB=460 within first 5 minutes.
Idle temp~43*C and loaded temp ~56*C
Hmm... I don't know if my input is relevant to your question, but I'm using G35 here, and the only high voltage I need for the chip to be stable is vNB.
Dude, you have a very good chip. So far I have only seen one other chip that will run 3.8-3.9 stable without a ton of voltages on the NB and VTT and that one is a Q9450.
Not everyone is going to realize the same success you did.
And you almost beat my 500 x 8 validate, too.
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