3900x OC

[whistleblower52]

Hi all, so I'm brand spanking new to the OC world. I recently bought a 420 AIO for my 3900x. I spent a whole night looking up OC guides and this is what I came up with after a night of testing and benchmarks. I am able to hit an all core of 4.3 at 1.305v. I was told that 1.3v was a safe starting voltage for 24/7 loads for zen 2. I just want to make sure 1.3 is confirmed to be a safe 24/7 OC voltage. I was able to complete multiple hour-long cinabench runs with no issues. My workflow is mainly just gaming and streaming so my CPU never gets anywhere near full load. Any advice and tips would be much appreciated.

[Moonzy]

Pretty sure at stock, the CPU runs around 1.29v, so 1.3v should be okay as long as temps are fine

 

4.3 all core is pretty neat for 1.3v, I could do 4.3 on one ccd, but only 4.15 on the other

 

But I chose to undervolt mine instead, run them cooler and quieter,  used to do 1.1v at 4.0, now it's 0.975v at 3.7, load temps is in the 60s lol

[glenalz81]

49 minutes ago, whistleblower52 said:

Any advice and tips would be much appreciated.

The CPU should boost to 4.6ghz+ on good cooling at stock. Setting an all core of 4.3 will see less performance in games but improve multicore workloads like video editing.

 

I would focus on RAM and FCLK tuning tbh. Can save and apply the 4.3 profile for heavy workloads but for gaming performance you'll be best served running stock + PBO.

[whistleblower52]

38 minutes ago, glenalz81 said:

The CPU should boost to 4.6ghz+ on good cooling at stock. Setting an all core of 4.3 will see less performance in games but improve multicore workloads like video editing.

 

I would focus on RAM and FCLK tuning tbh. Can save and apply the 4.3 profile for heavy workloads but for gaming performance you'll be best served running stock + PBO.

I have a 420 aio and have never seen anywhere near 4.6 in game even with PBO on. From all the benchmarking ive done(even gaming benchmarks) the manual oc has given me more performance than the stock settings as well as enabling PBO. From what Ive read, most peoples 3900x also doesnt get close to that in game most sit around 4. When I use PBO mine does an all more of 4.2 but at 1.4v. 

[glenalz81]

3 minutes ago, whistleblower52 said:

I have a 420 aio and have never seen anywhere near 4.6 in game even with PBO on

Somethings wrong then. I have a 3800x on a 360 aio running stock with an under volt and it boosts to 4550mhz, 50mhz more than advertised.

 

Your chip should be boosting to 4.6 and maybe a little more with the cooler you have.

 

Here's my hwinfo for the day. Average in games is 4450mhz.

 

 

[whistleblower52]

10 minutes ago, glenalz81 said:

Somethings wrong then. I have a 3800x on a 360 aio running stock with an under volt and it boosts to 4550mhz, 50mhz more than advertised.

 

Your chip should be boosting to 4.6 and maybe a little more with the cooler you have.

 

Here's my hwinfo for the day. Average in games is 4450mhz.

 

 

from what ive read, very few 3900xs go over 4.3 in game and the 4.6 claim from AMD is when it hits 4.6 for a couple of seconds in a single core benchmark. From all the testing ive done, im getting higher performance with the manual OC(even in gaming benchmarks) over stock or running PBO.

 

My friend also runs a 3900x on a 280 aio and he gets roughly the same clock speeds when he runs PBO.