1.65vcore safe for a 90nm 3700+ SD?

[shinzwei]

I can get it stable at 250x11. I have an XP-90 with a 92mm Japanaflo at 3000rpm with some as5.

EDIT: Lowered to 1.56v. Finished SuperPI.


http://pics.bbzzdd.com/users/renzoryuken/SuperPI.JPG

 

[Cook1]

I wouldn't put that much juice into a chip, 1.55v max.

 

[Shimmishim]

1.65 is pushing it especially for air.

i ran mine with 1.65 but with water.

 

[Elfear]

I pushed 1.65V through my 3700+ but only intermittently while gaming or benching and I was using water. I've seen guys get away with that much vcore on air but I wouldn't make that my 24/7 settings.

 

[Big Lar]

I agree with all the posts above mine/ IMHO 1.6v is the max, well, at least for me, and thats only to test. I don't like over 1.55v.

 

[kbyrd]

Is there any problem with higher cpu voltage other than heat? As a practicle example, I'm running mprime (Linux) now. Under this load, my vcore is at 1.67, and my cpu temp is 41. On my epox board this is +0.1V for CPU voltage. This higher setting let me boot with 270Mhz HTT x 10. Previously, I was trying 280Mhz x 10 and needed +0.35 (1.85V) to boot, but failed to run mprime.

So, assuming I could keep the CPU below 50C (or is 60C safe?) is it "safe" to use the higher vcore setting? That is, if I could get the system stable.

P.S. I understand I'm overclocking and if I break it it's my fault and all that. I'm just trying to figure out if a 45C CPU with a 1.8 vcore is worse off than a 45C CPU with a 1.5 vcore.

 

[Big Lar]

Supposedly over time, the Voltage will kill it, and or degrade the performance of the chip.
Your temps, How are they taken? Software/ Probe/Laser??

 

[kbyrd]

Thanks, so 1.8 is bad even if the temp is ok.

Well, that overclock failed a stabity test, my system locked up right after (mpime for about 20minutes). The CPU was at 40.5C.

I'm using the lm_sensors software in Linux, which used the i2c and various other kernel modules. Before I started, I checked the numbers against the temps shown in BIOS (obviously at idle, not load), and they looked identical. I know these aren't precise, but are they good enough? I'm air cooled, with a Zalman 7700Cu. I'm not going for monster overclock, just thought I'd see what I could do without trying to hard.

Sort of on the same topic (of voltages), what types of things will increasing chipset voltage help. I'm wondering about the overclock attempt that passes POST, but fails somewhere in the boot process (like initializing ide devices.

 

[shinzwei]

Originally posted by: Big Lar
Supposedly over time, the Voltage will kill it, and or degrade the performance of the chip.
Your temps, How are they taken? Software/ Probe/Laser??

Using SmartGuardian for my DFI LP nF4 Ultra-D. I think I will back it down to 1.6 to see if it can pass prime95.

 

[kbyrd]

I think I've got a stable system. I ran memtest86+ for a few passes (std tests), and I've ben running mprime for 8 1/2 hours.
I'm running an A64 3200 (Venice core, E6 stepping) with Corsair TwinX 3200C2 1GB (2 x 512) on an Epox 9npa+Ultra.
The OC:
2600MHz (260 * 10)
HT x3
MemDiv at 3:2 (or DDR266) for DDR346 RAM with 2-3-2-5 1T timings.
+0.1 CPU voltage
2.9V vDIMM
36C under load (mprime)

From the bad things I've read about E6 parts, I'm happy with this.

A few questions:
Is that "+0.1" on top of 1.45v? My mobo only lists modifiers for CPU voltage. The reading (again from the on board sensors) say 1.58V under load and 1.61V idle.