9900k with XI FORMULA not able to hit 5GHz

[Kratzr]

I´m able to hit 4,9GHz @1,285V but not 5GHz @1,32V.

Is this normal? Do I have a bad motherboard?

[Menthol]

Sounds like your CPU may not be a good enough sample, there are some that won't do 5.0. Try 1.35 volts, depending on cooling it may either not boot or get to warm for daily use

[x-rated]

Kratzr wrote:
I´m able to hit 4,9GHz @1,285V but not 5GHz @1,32V.
Is this normal? Do I have a bad motherboard?

do you have some LLC manually set in bios? if not, try 6 with adaptive voltage 1,34V or more for 5 GHz

[Kratzr]

x-rated wrote:
do you have some LLC manually set in bios? if not, try 6 with adaptive voltage 1,34V or more for 5 GHz

I use LLC 6 all the time and don´t you think 1,34V is too much for daily use?

[x-rated]

1,34V is nothing 😄 in load it will always drop bellow 1,3V anyways, in heavy load it will hit almost 1,2V

[Kratzr]

x-rated wrote:
1,34V is nothing 😄 in load it will always drop bellow 1,3V anyways, in heavy load it will hit almost 1,2V

and it´s safe for day to day use?

[x-rated]

of course it is, everything under 1,4V is super safe, but it also depends on your cooling capabilities
for example you wont be able to cool avx enabled prime95 with 1,4V set in bios probably

[mdzcpa]

Not the board. I'd go to 1.35v and see what happens. Not worth the heat for 1.4v only to gain another 100mhz. 4.9ghz at 1.285v is a good clock. I would suspect heat is the issue. What temps are you seeing under load?

[rjbarker]

mdzcpa wrote:
Not the board. I'd go to 1.35v and see what happens. Not worth the heat for 1.4v only to gain another 100mhz. 4.9ghz at 1.285v is a good clock. I would suspect heat is the issue. What temps are you seeing under load?

Agreed......once you hit 1.35v or so the gains simply arent worth it....as said above if you can do 4.9 all cores with 1.285v or so thats a nice Clock speed given the voltage... 2% gains for every 100Mhz increase is hardly worth runnig the additional current and heat....I hit 5 Ghz at 1.285v but 5.1 has a steep Voltage increase....not worth it....

[Silent_Scone]

My sample needs 1.34v for 5GHz. This is on the Formula XI, too. Roughly 50% of samples will do 5GHz on all cores, so there is very much still a lottery element involved. Cooling permitting, anything under 1.4v is fine.