tourist :
do you have any links to h81 or 87 mb that have successfully been overclocked with that kind of voltage ? Any system builder knows going that far out of specs can lead to other problems i agree just get a z97 board for under 100 dollars to play it safe.
http://www.coolaler.com/showthread.php/305670
10 seconds on google
4.8ghz 1.3v on h87.
I'm sure you can find others with a google of h87 OC just like I just did and ASUS has officially unlocked all K chips and G3258 now on many boards:
http://www.techpowerup.com/202196/asus-enables-overclocking-on-h97-h87-b85-and-h81-series-motherboards.html
http://www.tomshardware.com/news/gigabyte-biostar-overclocking-h87-b85,23435.html
Gigabyte and Biostar too (asrock also in other posts).
It goes without saying you should keep a copy of the "good bios" some place safe, and lock it from modification. Intel can't do anything if you don't let them. There is no way for them to force a mandatory board update. On older boards bios work is done, and you don't need new drivers at this point for them to function great, as that is all about as optimized as it's going to get on 87 chipsets.
http://www.bit-tech.net/news/hardware/2013/07/25/intel-overclocking-block/1
AS they say above :"As a result, we'd recommend that anyone enjoying the benefits of a K-series processor on B85 or H87 chipset motherboard treat any BIOS update from their manufacturer with suspicion from this point on."
You can always fix it if you update on accident anyway. Nothing stopping you from downgrading the bios.
Note sure what voltage you mean. I would not go over 1.3v on any current Intel's unless I was trying to set records or something and on a junker board I'd probably just see what stock got me with possibly a nudge above that if stock is low for your chip (though I think all boards should handle 1.2v fine for ages). I'd always recommend stock volts and seeing what you get first, then once you think it's slow in the future and are ready to replace it, go for more since at that point you don't care what happens. Most chips get a decent OC out of the box at stock if unlocked. Having said that 1.3v is not pushing any board to it's limits unless it's complete crap (the top 5 brands will do fine here for years, they are designed to). Really I'd say 1.2v if you're not putting on a good HSF and going over 1.25 usually doesn't get much but more heat for a few more mhz (even 1.1-1.2v might be too hot for stock hsf, depends on luck of the draw with the chip). That last 10% just isn't worth what you get in return with heat, watts, lifetime etc. For clarity, I mean ACTUAL volts, not what you set at manually. IE what the board actually says it's getting (under stress, like prime95 etc), not what you set it at.
Anandtech said this in the 4770k review:
"In terms of overclocking success on standard air cooling you should expect anywhere from 4.3GHz - 4.7GHz at somewhere in the 1.2 - 1.35V range."
Which is why I say 1.3 or less. Most hit 4.3+ before 1.3v anyway, so for most people I say why push it? I'm not talking water people here, or extreme cooling as those people should know what they're doing anyway.
But why would someone be interested in any of the old boards now? The cheapest board I'd actually touch of those old ones on newegg is $55 or so. Below that you should expect problems if doing anything but running stock or a mild OC and people are buying this chip to OC the heck out of it (at least 4ghz or what's the point?). You can only go so low and you're just buying junk at that point (even if not OCing IMHO). Out of 355 S1150 boards on newegg (sold by then not counting the market), I really don't want to be in the bottom 20 boards...LOL. There are basically no reviews on any of them for a reason.
I don't like MSI, so you have to get to Asus's H81M-K before I'd even buy and I wouldn't anyway, I just mean my lowest recommendation to the poorest on earth
Even then I'd be arguing against it, and I wouldn't sell anything under $80 if I was still running a pc business based on today's boards and what's on them. I just used to tell you to go away below what I considered not worth building. But I wasn't big enough to be fixing crap all day, and preferred to build stuff that just didn't come back 99% of the time.
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007627&IsNodeId=1&Description=H97&name=Intel%20Motherboards&Order=PRICE&Pagesize=50&isdeptsrh=1
H97 $80, and just checked the Z97 today with $15 off is also $80 for asrock. MSI Z97 is $85 right now. It would be different if these weren't available for a few months or something, but there are tons of models of both 97 chipsets out, so every other chipset is dead to me.
I get that you're saying the same as me basically, I'm really saying this stuff for other people's benefit
I hope people realize you shouldn't be buying a $40 board and expecting it to run well with this chip at 4.8ghz or something...ROFL. That's just plain crazy. The voltage regulation etc on those just isn't built for this kind of torture. For $80 people, you should just make the move to Z97 and be done with it as many have said. Why guess and end up disappointed over $25? If Z97 was $130+ maybe you'd have an argument, but at $80?