Originally Posted by Darylrese
I have finally got 5.0ghz stable after a 10hour PRIME95 test woohoo! 1.448v - 1.454v fluctuating due to offset voltage but mainly staying on 1.448v. No more WHEA-LOGGER errors.
Tax temps: 77, 83, 84, 78
...is this good?
Will 1.448v degrade my chip or is it fairly safe? The CPU idles at around 1.018v when not in use so will only be at 1.448v when gaming or under stress.Warning: Spoiler! (Click to show)
Nice! Those temps and voltages should be fine - provided you're not folding 24/7 on that rig I don't see an issue. Technically, it shouldn't be in danger of degradation even if you maintained a 100% load 24/7 at those values - but that's where technical specs and real-world experience possibly diverge. According to Intel specs
At condition outside functional operation condition limits, neither functionality nor long term reliability can be expected. If a device is returned to conditions within functional operation limits after having been subjected to conditions outside these limits, but within the absolute maximum and minimum ratings, the device may be functional, but with its lifetime degraded on exposure to conditions exceeding the functional operation condition limits.
This note is made in reference to the VID values which are provided in a table - the range of which is 0.00v - 1.52v. I believe this is where people get the '1.52v is the vcore limit per intel' - however, as we are all well aware - the VID values are not necessarily anywhere close to the actual vCore values required for stability (hence offset). However, if we infer the above note to apply to both - then as far as voltages are concerned, any value less than 1.52v seems to be deemed "inside functional operation condition limits" and not necessarily
a causal factor in degradation.
That being said - until several people who have been running their chips at ~1.52v for more than 3-5 years - there simply isn't any concrete evidence one way or the other. Just a good guess that lower values will be fine and slightly higher values might
degrade performance. The TjMAX values are well known at 105C - so I think it's safe to say that anything that reaches those temps will experience degradation eventually... despite throttling allowing limited operation for a period of time.
I've seen a ton of very conservative views... but I personally feel that anything less than 1.52v and less than 95C should at the very least be good for a warranty replacement should degradation occur (as this is within the whitepaper stated envelope for each value). On the 'practical side' there is some wiggle room I think as there are several people that have run 1.55v for reasonably long periods without significant degradation issues.
I think it's important to remember the relationship between heat and voltages in causing leakage and degradation. Since you are far, far below the thermal envelope even under unnaturally stressful conditions - and are comfortably within the voltage limits as well... you should be fine for several years IMO. On the other hand, if you aren't paying attention and have your pump fail while gaming... it's pretty likely (depending on how long it takes you to diagnose the 'spontaneous crashes' as a cooling failure) that it will experience at least some degradation and may require more vcore or lower clocks at the same values to again be stable.
In the end, if it only
lasted you the warranty period before having degradation that required adjustments... are you going to care? By that time you can pick up a 4770K on closeout for probably $200 or less. Sorry for writing that novel. Edited by DiGiCiDAL - 8/26/13 at 3:36am