Overclocking RAM past rated speed?

[TSL]

I was wondering of the pros and cons of overclocking RAM past it's advertised speed. Is it dangerous/ bad for the modules? Is there any performance improvement? I have G.Skill 2x4GB DDR4 2133MHz CL15 RAM [NOT XMP ABLE MEMORY], but I have overclocked it to 2666MHz and CL16 within the last hour. Everything seems stable; I ran some CPU benchmarks like Cinebench and also PassMark ram tests and no problems. The synthetic benchmarks showed roughly a 35% performance increase. I have an i5-6600K @4.6GHz and a Asus Z170-AR Mobo.

 

First image is recommended speeds.Second image is what it's running at now.

[Mooshi]

There isn't really a con if this was done with stock voltage. Ram also has lifetime warranties so that's also a non issue. Pros would be higher synthetic and a couple of extra FPS.

[Cyracus]

with Intel there's not much real world improvement, probably 10% from base speeds to the highest on market except in synthetic tests which don't matter. Ryzen has much bigger performance dependence on ram speeds and sees double digit percentage gains in real world usage going from base to higher speeds

[TSL]

1 minute ago, Cyracus said:

with Intel there's not much real world improvement, probably 10% from base speeds to the highest on market except in synthetic tests which don't matter. Ryzen has much bigger performance dependence on ram speeds and sees double digit percentage gains in real world usage going from base to higher speeds

But is it harming my computer by running at this speed?

[Cyracus]

3 minutes ago, TSL said:

But is it harming my computer by running at this speed?

no, ram can be difficult to get an OC stable, and it can surprise you at the worst of times, my point was there's very little reason to do it on Intel, but it won't harm your system (unless you raise the voltage on the ram which could fry it, though some people have run their ram at 1.9v for long periods of time *not a recommendation, bad idea imo*)

[TSL]

1 minute ago, Cyracus said:

no, ram can be difficult to get an OC stable, and it can surprise you at the worst of times, my point was there's very little reason to do it on Intel, but it won't harm your system (unless you raise the voltage on the ram which could fry it, though some people have run their ram at 1.9v for long periods of time *not a recommendation, bad idea imo*)

The voltages are at stock, 1.2v and I wouldn't go above 1.35 for RAM as that's what factory overclocked ram runs at.