The Phenom II List of Overclocks

[Dumo]

Yep for the reader

Hardware changed, but Zippy 850W and TTBT still follow

[daellum67]

here is some preliminary clocking

i had a buddy's 920 in my rig earlier(his board is out for rma), but my 940 came today via snail mail unexpectedly. got a quick clock out of it that it can probably run with lower volts:



the nb's on these new phenoms impress me. the 920 was good for 2.5, now 2.6 on this 940. i could boot at 2.8, but it would fail prime instantly with pretty much any voltage. 8gigs of 1066 with the NB at 2.6 required 1.325v

now, im going to push the CPU core higher. 1.55 is the limit of safety, correct? im afraid to push really high on volts because i've already blown up one of these mobos (dfi 790fxb-m2rsh, strangely everything was at stock settings). i do have another one as a backup, though.

[amdcian]

here is some preliminary clocking

i had a buddy's 920 in my rig earlier(his board is out for rma), but my 940 came today via snail mail unexpectedly. got a quick clock out of it that it can probably run with lower volts:



the nb's on these new phenoms impress me. the 920 was good for 2.5, now 2.6 on this 940. i could boot at 2.8, but it would fail prime instantly with pretty much any voltage. 8gigs of 1066 with the NB at 2.6 required 1.325v

now, im going to push the CPU core higher. 1.55 is the limit of safety, correct? im afraid to push really high on volts because i've already blown up one of these mobos (dfi 790fxb-m2rsh, strangely everything was at stock settings). i do have another one as a backup, though.

And that impressive NB clock is default or had been overclocked?

[Halk]

u better be watercooling ur nb then i saw that the thermalpad melted on mine when i installed the nb waterblock... all voltages are tweaked except the sb voltage

I've noticed a lot of heat coming from it. My waterblocks don't fit well enough to use though. Going to have to get some imported from Germany.

[Sentential]

***IMPORTANT NOTICE FOR MSI USERS***

Just checked their website today (just now) and it appears they released all Deneb related bios for their boards, I just updated mine and it seems to be QUITE a bit more stable than the bios I was using previously. Just wanted to give everyone the heads-up

[Oldguy932]

Major update is about to be uploaded. Thanks a bunch for the program Particle, I'll get to moving everything over during next week. I have to finish packing and drive back to college tomorrow so no updates on the list from now till monday. Now I just need to figure out how to transport the computer since the front two screw holes to connect the vapo case to the other case were in the wrong place so it just hangs if I pick it up from the top. I also need to finish doing the wiring.

[Stuen4y]

now, im going to push the CPU core higher. 1.55 is the limit of safety, correct? im afraid to push really high on volts because i've already blown up one of these mobos (dfi 790fxb-m2rsh, strangely everything was at stock settings). i do have another one as a backup, though.

You mean that high voltage can affect not only on the cpu but on the mobo?

[Sentential]

You mean that high voltage can affect not only on the cpu but on the mobo?

There were some issues with people popping their motherboard's FETs with too high a voltage with the 9950BEs is what he is refering to. Frankly I tend to agree with him as I'm having voltage stability issues on my particular motherboard around 1.55v give or take (or 1.65v on the 9950 I had from before)

[Daveburt714]

Here ya go Oldguy.

I'm pretty sure this chip will do alot better. Actually primed it for about 1/2 an hour @ 3.87 using 1.525v, Prime never crashed but the board over heated and shut down. I'll probably move it to the 79-T and put it under water tommorow. The power section on this Biostar is pretty weak..

[Stuen4y]

There were some issues with people popping their motherboard's FETs with too high a voltage with the 9950BEs is what he is refering to. Frankly I tend to agree with him as I'm having voltage stability issues on my particular motherboard around 1.55v give or take (or 1.65v on the 9950 I had from before)

Same thing is with my 9850, around 1.616V is the max voltage the processor is stable. I know about this limitation, but I didn't knew the mobo can also break down.

[largon]

"Explosive issues" of the FETs is more due to power draw from the VRs than output voltage itself. At a given voltage, Deneb is easier for the VRs to feed compared to Agena.

[Lightman]

If anyone is interested I've did quick NB/volt scaling test.

- 1.175V good up to 2.35GHz
- 1.225V good up to 2.5GHz
- 1.25V good up to 2.65GHz
- 1.275V good up to 2.7GHz
- 1.335V good up to 2.8GHz
- 1.4V good up to 2.94GHz for now ....




All tests done using 11x multi for NB because 12x multi is no boot for me. I wonder when Gigabyte will add positive voltage adjustement for NB in their BIOS. It's retarded to have 20x NB multi and no option to increase NBvCore

[BertM]

update for my new speed.
placed 3 130cfm blowers on the pa120.3.
all voltages at stock.
cpu 3616mhz with nb 2210mhz.
aod shows wrong values.
didnt thrust the temp, saw it go up, so i opened the window .
in holland its around 0 degree at the moment.

[Lightman]

@BertM: If you want to fix AOD readings just load BIOS Defaults or clear cmos.
BTW very nice clocks indeed!

[BertM]

k i will do that today probably.
few minutes ago i saw that i ran it with cl 5 7 7 24. bah .
htt oc with cpu to 3654 or just multi up to 3700mhz is a crash in short amount of time.
you wouldnt expect that while 3600 is stable probably 6 degree higher.
there is a hard barrier at around 3650 i asume.
im now testing 3636. (edit: it crashed at 15 minutes to go)

[Oldguy932]

Quick update done. Changed the name of the thread to a more recognizable one.

[daellum67]

And that impressive NB clock is default or had been overclocked?

the NB is overclocked.

"Explosive issues" of the FETs is more due to power draw from the VRs than output voltage itself. At a given voltage, Deneb is easier for the VRs to feed compared to Agena.

i popped my first board with everything at stock settings. im fairly certain that an OC'd deneb is going to draw more than a 9950 at stock, but i am also fairly confident that the first board was defective and not representative of the majority of these DFI boards.

[krjalone]

Little progress:

[Particle]

Nice. Anyone hitting 4GHz have some advice?

[Bgriffs]

Just got done some initial testing of my new toy

AMD Phenom II 940 CACVC AC 0850CPAW
3.840ghz
Vcore 1.52V
NB 2.40ghz
4x2gb Ram

All air cooled and running on my trusty DFI DK 790FX. Haven't given prime a run yet, still tweaking it a bit more but it does play Grid pretty damned well at 1920x1200 with all the goodies on.

[2good4you]

If anyone is interested I've did quick NB/volt scaling test.

- 1.175V good up to 2.35GHz
- 1.225V good up to 2.5GHz
- 1.25V good up to 2.65GHz
- 1.275V good up to 2.7GHz
- 1.335V good up to 2.8GHz
- 1.4V good up to 2.94GHz for now ....




All tests done using 11x multi for NB because 12x multi is no boot for me. I wonder when Gigabyte will add positive voltage adjustement for NB in their BIOS. It's retarded to have 20x NB multi and no option to increase NBvCore

I'm one of the guys that is extremely interested of the NB/L3 oc. Nice work, and it seems to scale good in frequency with the voltage

[pershoot]

AMD Phenom II X4 940
DFI Lanparty LP DK 790FXB-M2RSH - 12/26 Beta
Stepping: CACVC AC 0850BPDW
18.5x200x12x9 (CPU: 3.7GHZ, NB: 2.4GHZ, HTT: 1.8GHZ)
CPU VID: 1.41v, NB VID: 1.2375v
1066-5-5-5-15-20-195x4, 2x2GB, VID: 2v
Cooling: Water

http://img58.imageshack.us/img58/251...mii3724as5.jpg

[Dumo]

Still trying to find max. on air...

[chew*]

Still trying to find max. on air...

Dumo, do keep me posted on how you feel about that board after using it awhile.

[fizur2002]

agreed