Originally Posted by etre
Long story short ... new system:
Ryzen 5 3600
Gigabyte B450M Aorus
2x8 Gb DDR4 3000
Windows 10 1903
Latest Chipset drivers
Latest bios with AGESA 184.108.40.206 ABB
Cinebench scores are 2950 for CPU and bellow 400 for single core. These are very low scores, right ?
What I tried:
PBO on and off, tested both.
Different power plans.
Reinstalled drivers, updated bios (before was with AGESA 220.127.116.11 AB)
Temps are fine. The CPU hovers around 70C in full load (I'm doubtful about this since until I get a better cooler than stock I'm using a low profile ID Cooling IS-40V3 ... but well, that's what the readings say).
VRM temps are fine (around 40C to 50C in load). Everything is fine, nothing should throttle.
Despite that ... the system doesn't perform well.
Any ideas please ?
PS: Screenshots uploaded but with the latest bios reset I forgot to enable xmp. The ram is running at 2666, not that it did any difference.
So I don't have that board, or That CPU, I run with a 3900x, but I am pretty sure I know your issue. PBO is pretty broken right now, especially on ABB, although AMD Won't admit it. You might be able to get someone who is more familiar with the Gigabyte board you are on with the 3600 in it to help you, they might have a trick to get boost to work properly, but essentially this is what happens.
Once you load all Cores and your T-Die Temp goes above 65-70c, Your All Core Boost Drops down to around 4Ghz. Is that what you are seeing? Because if so that is common with a bunch of 3900x and 3700x Owners. It seems 3800x owners are getting better boost speeds on average. Unless someone can tell you how to manipulate PB and PBO on your Board (there might be an older UEFI where it works better, 18.104.22.168 is where it worked best on ASUS boards) What I suggest, is at least Temporarily settings your Voltage to 1.3 to 1.35v on your vCore, and then seeing how far you can manually push an All Core. You will Most likely be able to get at least 4.25Ghz All Core at around 1.3v give or take 50mv, and then run Cinebench. I bet your Score will jump up to around the 3700 Mark or so. Again I don't have a 3600, so I am just halving my score to estimate where you should be landing, but I regularly hit around 7350 to 7400 on mine with a 4225Mhz All Core OC, so I am willing to bet you can get to around half that if you did the same.
I know it sucks boost is broken, but You may find that another UEFI works better for you, or you may find a Gigabyte board owner who knows how to manipulate PBO on their board willing to help you out. I recommend looking for a thread of people who own your board and post there as well.
Let me know if you get a better score with an All Core overclock though when you get a chance!