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Opty 165 Highest Safe Voltage - Page 2

post #11 of 18
Quote:
Originally Posted by MjrTom View Post
I would have to disagree with you there.

The reason CPU's tend to fail is due to electron migration. Voltage is the flow of electrons from a point of high concentration to a low concentration. As the electrons pass through the CPU core they travel through lanes. As the voltage is increased the force that these electrons have is increased. With increased energy they bombard the pathways slowly etching until they break through the lane and into an adjacent lane causing failure of this section of the core architecture. If this happens sufficiently you get total failure of the CPU this is electron migration.

The temperature also has a similar effect. With increaseing temperature the electrons gain extra momentum giving a similar effect as stated above but also can lead to physical scorching of the core and die.

This is why for instance, sudden northwood death syndrome (SNDS) happens on the older Intel cpus (and others in fact) you can have great temperatures but if the volts are too high that can kill it also. (I know this from personal experience)

Therefore to summarise it is a combination of voltage and temperature that effect the the lifespan of a CPU.
Correct.... You cannot simply apply a lot of voltage and assume everything is fine because temps are low.
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post #12 of 18
Thanks.

I would say to keep it below 1.55v if you are air cooling.
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post #13 of 18
Well I would say 1.6 For Air cooling since your CPU is .90nm but for me, 1.8v is better because I have 1.30nm core and the stock voltage is more
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post #14 of 18
For any 90nm dual core I wouldn't go above 1.55V, and even that is pushing it. These chips get a lot hotter than single cores, so even running with stock voltages will give you high temps. Also, it's not only the temp. on the CPU that you have to worry about; as said earlier, the MOSFETs can only take so much voltage (and heat) before crapping out.
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post #15 of 18
If I can get my computer to last like 3 years on 1.55V, I'm not gonna worry about it much.
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post #16 of 18
Quote:
Originally Posted by beret9987 View Post
If I can get my computer to last like 3 years on 1.55V, I'm not gonna worry about it much.

Well, my old sktA CPUs still work after 4 years and they remain overclocked with 1.7V running through them. My very first skt939 Venice still runs after 2 years of having 1.6V in it. Of course those are with extreme air (Tornadoes and other Thermaltake high speed fans) so keeping things cool does help a lot.
I always envision dual cores as being more delicate compared to single cores, so I never go past 1.55V. But as said before, watch your MB temps. too; my CPU is rather cool now with my WC, but because I now don't have the extra fan from my SI-120 blowing on the MOFSETs, my MB temp. is like 60*C (and it's Winter now), so I may have to reduce my OC even though my CPU rarely passes 46*C.
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post #17 of 18
Yeah those mosfets get very warm (similar mobo also got SI-120) mine runs at around 45*C
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post #18 of 18
Quote:
Originally Posted by MjrTom View Post
Yeah those mosfets get very warm (similar mobo also got SI-120) mine runs at around 45*C

That was the temp. on mine. Now I only have the side panel fan blowing on the board, and even that will have to come off eventually because I can barely close my case with all those tubes. I may put some extra heatsinks somewhere in there, but I doubt that will be of much help.
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