how high can I go on cpu voltage?

I got no response over on a.c.h.o.amd, so I'll try here...

system in sig.

I have been running this cpu at 220 since I got it (a year ago?), but I never
played with the voltages, and I didn't know whether it was the cpu or memory
or what that was limiting it (I couldn't go over 223 or so).

For some reason I started playing with voltages and nvidia system tune that
came with 163.71 (nforce 6.86) and relatively easily determined that it was
the cpu (venice core as I recall) so I upped cpu, and also memory cpu orig
1.440 now 1.540 mem orig 2.60 now 2.70
pcie orig 1.5 now 1.60

I use speedfan 4.33 - cpu in cpu gets to 56C, cpu on mobo gets to 49C, idle
is 35 and 40 respectively. case abmient is about 32 or so.

cpu was retail and I use the hsf that came with it as it has always run very
cool. I do not let the mobo control the hsf speed. As I recall, I set the
bios to shut the mobo down if cpu on mobo reaches 56C.

cpu 240 2640mhz
HT (4x) 960
memory 480 (rather surprised this goes!)
pcie still at 100 (2500mhz) so next I will try playing with that and see.

But the question is, how high can I push the voltage on the cpu and be
relatively safe?

Case is Ultra with 120mm in in front, 120mm out in back, 80mm in on side over
cpu sorta, 350watt Ultra (600 on way) with 120mm fan.

tia!!!

------- later, I wrote:

I backed the cpu voltage to 1.520 which I see speedfan lists as 1.55 and
dropped cpu speed to 235 to get 3DMARK05 to not hang.

I then played around with the pci-e clock going up from 100 to 120 and got a
huge increase in 3DMARK05 from 3648 to 3666. wow. LOL. I don't understand why
it doesn't have a bigger effect, but..... That had no effect on stability.

--
-Kris
ABIT KN8 Ultra(NForce4Ultra), Ath64 3500+, 2x512MB Geil, Leadtek PX6600GT TDH 128mb, Leadtek WinFast TV2000 XP Expert TV card.
XP Pro SP 2++++

On 10/14/2007 7:54:37 PM, "Kris" wrote:
> I got no response over on a.c.h.o.amd, so I'll try here...
>
> system in sig.
>
> I have been running this cpu at 220 since I got it (a year ago?), but I
> never played with the voltages, and I didn't know whether it was the cpu
> or memory or what that was limiting it (I couldn't go over 223 or so).
>
> For some reason I started playing with voltages and nvidia system tune
> that came with 163.71 (nforce 6.86) and relatively easily determined that
> it was the cpu (venice core as I recall) so I upped cpu, and also memory
> cpu orig 1.440 now 1.540 mem orig 2.60 now 2.70
> pcie orig 1.5 now 1.60
>
> I use speedfan 4.33 - cpu in cpu gets to 56C, cpu on mobo gets to 49C,
> idle is 35 and 40 respectively. case abmient is about 32 or so.
>
> cpu was retail and I use the hsf that came with it as it has always run
> very cool. I do not let the mobo control the hsf speed. As I recall, I set
> the bios to shut the mobo down if cpu on mobo reaches 56C.
>
> cpu 240 2640mhz
> HT (4x) 960
> memory 480 (rather surprised this goes!)
> pcie still at 100 (2500mhz) so next I will try playing with that and see.
>
> But the question is, how high can I push the voltage on the cpu and be
> relatively safe?
>
> Case is Ultra with 120mm in in front, 120mm out in back, 80mm in on side
> over cpu sorta, 350watt Ultra (600 on way) with 120mm fan.
>
> tia!!!
>
> ------- later, I wrote:
>
> I backed the cpu voltage to 1.520 which I see speedfan lists as 1.55 and
> dropped cpu speed to 235 to get 3DMARK05 to not hang.
>
> I then played around with the pci-e clock going up from 100 to 120 and got
> a huge increase in 3DMARK05 from 3648 to 3666. wow. LOL. I don't
> understand why it doesn't have a bigger effect, but..... That had no
> effect on stability.
>

LOL - that's what I get for being impatient! Got 2 answers that, I think,
fill the bill. vcore max probably 1.65
cpu case temp max probably 65C

Thanks for looking in, though!

--
-Kris
ABIT KN8 Ultra(NForce4Ultra), Ath64 3500+, 2x512MB Geil, Leadtek PX6600GT TDH 128mb, Leadtek WinFast TV2000 XP Expert TV card.
XP Pro SP 2++++