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is 1.8V too much for Socket 754?

G

govtcheez75

Platinum Member
I have an A643200+ Newcastle chip, with a DFI UT Lanparty nf3-250gb, and Geil PC4000 memory. I really wanted to run this setup at 2500mhz, but was stuck at 2400mhz (240X10) for the longest time. It ran 2400mhz pretty easily, by giving it only 1.55-1.6 Vcore, and had really good temps (37-38 idle, 54 full load).

I was reading up on a few things, and had seen a few people use 1.8-2.0 volts on their Socket 754 chips to achieve amazing overclocks, so I thought I'd give it a try. I gradually rose the Vcore, until it was rock solid stable running 2500mhz. It would boot to Windows at 1.6V, but was totally unstable (crash/hang up/prime95 fail), and at 1.7V-1.78V, became a little more stable, but would only Prime95 for about 20-30minutes after getting errors. I am now at 1.8V, and the temps don't seem too bad. 39-40 degree idle, and 62-63 degree on full load (Prime95 for 10+ hours, at priority 10!). It seems VERY stable now, as I will keep running prime95 for about 20 more hours.

...the question is...is this safe? Am I risking anything by running it with such high Vcore, even if the temperatures seem to be OK? I am using a Thermalright SP-90 with a good 92mm fan, and I have a backup chip that has not been overclocked, so this one is pretty much an "experimental" one...but if I can get the 250X10 that I'm running now, then I would be VERY happy.
 
i would say yes might want to consider going to wc if u can to drop temps some 60 is ok but not good
also what power supply are u running
personally i like never to go above 55c load max but amd says 80 is max someone correct me if im wrong
 
as long as the temps stay low, it shoud be ok. I've heard that raising memory voltage above about 2.8v can damage the on-die memeory controller, but havent heard of similar issuses with vcore. for ocing, i wouldnt want max core temp to exceed 55c or so
 
the general rule of thumb for danger of frying your cpu is 60C.

again very general, i never exceed 60C under load, though i get close, and im safe

edit: engrish
 
he's asking about the voltage load max, w/ temps.

He never got the actual answer to, Is 1.8 vcore too high and risky?
 
On an Athlon XP, 1.8 is acceptable. But I heard that Athlon 64s should be run with less than that.

I suggest going back to your 2.4ghz with whatever voltage you were running before. Your cpu will live longer, and be honest, can you tell a difference performance wise at 2.5ghz from 2.4?
 
1.75 for newcastle is comfortable max but I'm just guessing like everyone else since AMD refuses to provide maxes like they did for bartons.

1.65 for winch.

Personally 0.2 more volts for lousy 100 more Mhz is not worth it. Which I why I run what you see below with 1.55 instead of 1.7 required for 2700Mhz.
 
Ok. I've "settled" on a much better voltage, and temps, and getting a similar overclock, but without the 1:1 memory. The memory runs pretty stable up to 260mhz, which is one of the reasons I wanted to run on the 10X multiplier, but I've discovered the 9:10 memory divider. I can run 2475mhz 275X9 with only 1.65V, with my memory running 248. I'm guessing that the higher FSB would probably yield better results.

....I'm going to try to bump it up to 278FSB, so I can hit my goal of 2500mhz. 🙂
 
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