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seward

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Discussion starter · #1 ·
I had to replace my home office computer quickly, and I was broke, so I put together an AMD Ryzen 5 4600G cpu, Asus Prime B550-PLUS motherboard, and 2x8GB Corsair Vengeance DDR4 3600, with Windows 11 OS (couldn't recycle my Windows 7 license). I was happy just to get to desktop and go online, because that meant that I could continue to eat. Then I learned that I could overclock this cpu on this board, like I'd done years ago with Intel chips, and that cheered me up, because overclocking is fun. Then I learned that newer chips, even unlocked ones, have so much built-in performance enhancement (particularly AMD, with Performance Boost Overdrive) that it's "almost pointless" to overclock them; the benefit ("a few extra frames per second") wasn't worth the cost to the chip in possible physical degradation.

But overclocking really is fun, if you have the time, and these aren't the most expensive parts, and there's not much on the new hard drive if things go pear-shaped, so I overclocked the 4500G to 4.2 ghz @ 1.312v (BIOS setting), RAM @ DOCP settings (3600), fclk = 1800. 12+ hours Prime95, haven't done any other stress tests yet. Temps were surprisingly low with decent air cooling (DeepCool AG400 on cpu).

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I need to do some performance tests like Cinebench...I got lazy over the years, stopped running those. I'll try to remember to put some scores up comparing stock vs overclock. I should say that it sounds like I ought to be prepared to see much less of a performance increase than I saw in previous overclocks of Intel cpus from more than a decade ago - dual cores, q9550, 2500k (that's the one that got me from 2010 to 2023). I play old games, and Fraps says that I've gained a couple of frames per second in old games like StarCraft 2 and SupCom 2.

I didn't jump straight to 4.2; first, I went to 4.0 using Auto volts, then 4.1 ghz (Prime95-stable @ 1.282v BIOS setting). I've actually gone back to 4.1, and I hope to bring the volts down a little. At the moment, I feel like it's a good idea to not force 1.312v to the cpu (but I may change my mind!). AMD is new to me, and it looks like fclk and SOC voltage are settings that are somewhat similar to northbridge/southbridge settings - they can complement the simple "raise cpu clock, raise cpu volts" formula, which I got a little too used to after it became somewhat standard a little over a decade ago. I don't feel the urge to go past 4.2 ghz at this voltage, but I'd like to learn about that stuff. I think it's fantastic that you can do so much with inexpensive boards today.

Circling back, I'd like to reiterate that I'm not sure that overclocking a cpu today, particularly an AMD Ryzen 5 with PBO, is really defensible as a practice that gives benefits to offset the costs, but it really is fun to overclock cpus, even the parts where you're sleeping while Prime95 is running. It's fun. Also, stock is boring.
 
Discussion starter · #2 ·
I just spent a couple of days running Cinebench, with stock settings and with 4.2ghz overclock settings. Stock settings won multi- and single-core runs, with an average of 9442/1258 (multi/single), versus overclock's average of 9370/1237.

I've been educating myself about Performance Boost Overdrive, so I'm not that traumatized by results. It looks like PBO vs manual/auto overclock was something that was discussed at length when it first became apparent, a few years ago, and that I got back into overclocking - and started using AMD - around the same time that everyone had gotten sick of talking about how it may be pointless to overclock newer AMD cpus. I guess it's nice of them to let us amuse ourselves in BIOS...anyway, I suppose I get a performance boost one way or another. An unexpected upside of manually controlling cpu voltage was that I could lower the Auto volts, which were high. Things seem to have gotten a little better since I backed off the overclock and went back to stock clocks and Auto volts (i.e. not going over 1.4v routinely), but I may go back in just to undervolt.

I'm still trying to work out the thinking behind this, which was presumably related to money. Did consumer overclocking cost AMD so much money that they needed to curtail it?
 
I had to replace my home office computer quickly, and I was broke, so I put together an AMD Ryzen 5 4600G cpu, Asus Prime B550-PLUS motherboard, and 2x8GB Corsair Vengeance DDR4 3600, with Windows 11 OS (couldn't recycle my Windows 7 license). I was happy just to get to desktop and go online, because that meant that I could continue to eat. Then I learned that I could overclock this cpu on this board, like I'd done years ago with Intel chips, and that cheered me up, because overclocking is fun. Then I learned that newer chips, even unlocked ones, have so much built-in performance enhancement (particularly AMD, with Performance Boost Overdrive) that it's "almost pointless" to overclock them; the benefit ("a few extra frames per second") wasn't worth the cost to the chip in possible physical degradation.

But overclocking really is fun, if you have the time, and these aren't the most expensive parts, and there's not much on the new hard drive if things go pear-shaped, so I overclocked the 4500G to 4.2 ghz @ 1.312v (BIOS setting), RAM @ DOCP settings (3600), fclk = 1800. 12+ hours Prime95, haven't done any other stress tests yet. Temps were surprisingly low with decent air cooling (DeepCool AG400 on cpu).

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View attachment 2619583 View attachment 2619582 View attachment 2619583

I need to do some performance tests like Cinebench...I got lazy over the years, stopped running those. I'll try to remember to put some scores up comparing stock vs overclock. I should say that it sounds like I ought to be prepared to see much less of a performance increase than I saw in previous overclocks of Intel cpus from more than a decade ago - dual cores, q9550, 2500k (that's the one that got me from 2010 to 2023). I play old games, and Fraps says that I've gained a couple of frames per second in old games like StarCraft 2 and SupCom 2.

I didn't jump straight to 4.2; first, I went to 4.0 using Auto volts, then 4.1 ghz (Prime95-stable @ 1.282v BIOS setting). I've actually gone back to 4.1, and I hope to bring the volts down a little. At the moment, I feel like it's a good idea to not force 1.312v to the cpu (but I may change my mind!). AMD is new to me, and it looks like fclk and SOC voltage are settings that are somewhat similar to northbridge/southbridge settings - they can complement the simple "raise cpu clock, raise cpu volts" formula, which I got a little too used to after it became somewhat standard a little over a decade ago. I don't feel the urge to go past 4.2 ghz at this voltage, but I'd like to learn about that stuff. I think it's fantastic that you can do so much with inexpensive boards today.

Circling back, I'd like to reiterate that I'm not sure that overclocking a cpu today, particularly an AMD Ryzen 5 with PBO, is really defensible as a practice that gives benefits to offset the costs, but it really is fun to overclock cpus, even the parts where you're sleeping while Prime95 is running. It's fun. Also, stock is boring.
I just spent a couple of days running Cinebench, with stock settings and with 4.2ghz overclock settings. Stock settings won multi- and single-core runs, with an average of 9442/1258 (multi/single), versus overclock's average of 9370/1237.

I've been educating myself about Performance Boost Overdrive, so I'm not that traumatized by results. It looks like PBO vs manual/auto overclock was something that was discussed at length when it first became apparent, a few years ago, and that I got back into overclocking - and started using AMD - around the same time that everyone had gotten sick of talking about how it may be pointless to overclock newer AMD cpus. I guess it's nice of them to let us amuse ourselves in BIOS...anyway, I suppose I get a performance boost one way or another. An unexpected upside of manually controlling cpu voltage was that I could lower the Auto volts, which were high. Things seem to have gotten a little better since I backed off the overclock and went back to stock clocks and Auto volts (i.e. not going over 1.4v routinely), but I may go back in just to undervolt.

I'm still trying to work out the thinking behind this, which was presumably related to money. Did consumer overclocking cost AMD so much money that they needed to curtail it?

Hello, I saw your publication and I have been encouraged to talk with you about this processor since I have the same processor (R5 4600g)
The truth is that I am a newbie in the subject of overclocking undervolt but I wanted to see if it can improve performance and at the same time in temperatures, until now I have had turbo boots deactivated at a standard frequency of 3.7ghz at temperatures around 60 degrees I wanted to turn the turbo bots back on so I get the extra boost up to 4.2ghz, the default temps are around 85 degrees in CinebenchR20 with around 1.344v so I wanted to try an undervolt in the offset mode in the settings voltage in bios of -100mv, which is the maximum that it allows me to drop on an asrock b550m steel legends motherboard, and the temperature dropped from 85 degrees to about 75-77 degrees in the same test with a voltage around 1.232, something considerable, the llc level is level 4 on my b550m board, the lowest possible.

But I wanted to know if leaving the turbo boot active is a good idea to leave it active instead of doing a manual overclock undervolt setting frequency and voltage. I didn't like doing manual overclock because the frequency stays fixed at the specified speed and doesn't go up or down depending on the demanded load and that makes me think that it could be bad for the chip.

If my way of communicating seems strange, it's because I don't speak English and I used Google translator to translate what I write. I've always been passionate about hardware and I'm from Venezuela.
 
Discussion starter · #4 ·
Hi, thanks so much for responding to my post! I must confess that I'm not (yet) a very good source for undervolting tips. I'm relying on Performance Boost Overdrive for apu clock overclocking now, but I haven't begun to work on undervolting. (I've been concentrating on memory/fclk overclocking, to improve igpu performance). I've also moved from a 4600G to a 5600G. Id' be very interested to hear any suggestions from others regarding undervolting of these AMD Ryzen apus.
 
Id' be very interested to hear any suggestions from others regarding undervolting of these AMD Ryzen apus.
Using a fixed speed/voltage is not the way to go. We use CO and PBO to overclock and undervolt these APUs.
You undervolt these APUs by nailing an aggressive CO, (rather -30 on most cores). Plus a moderate PBO, (with EDC at 115, or such). You can look here too:
 
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Discussion starter · #6 ·
Using a fixed speed/voltage is not the way to go. We use CO and PBO to overclock and undervolt these APUs.
You undervolt these APUs by nailing an aggressive CO, (rather -30 on most cores). Plus a moderate PBO, (with EDC at 115, or such). You can look here too:
I dropped my static overclock once I figured out that PBO does the job well enough. I was kind of bummed that there was no point in working hard on a static cpu overclock, but now I have cpu undervolting (to optimize PBO) and memory overclocking to keep me busy!
 
I dropped my static overclock once I figured out that PBO does the job well enough. I was kind of bummed that there was no point in working hard on a static cpu overclock, but now I have cpu undervolting (to optimize PBO) and memory overclocking to keep me busy!
Yeah, that's the way to go. The static overclock was great in the good old days of Intel CPUs, but now it's all about PBO, CO on these APUs.
Yeah, you should overclock the RAM too. These APUs have a great IMC and it's really fun to overclock the RAM.

You can overclock and undervolt the iGPU with an aggressive CO too (try -30 and test), but that would be limited to 200Mhz.
 
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Discussion starter · #8 ·
Yeah, that's the way to go. The static overclock was great in the good old days of Intel CPUs, but now it's all about PBO, CO on these APUs.
Yeah, you should overclock the RAM too. These APUs have a great IMC and it's really fun to overclock the RAM.

You can overclock and undervolt the iGPU with an aggressive CO too (try -30 and test), but that would be limited to 200Mhz.
It's fun to learn about the relative strength of the apus' IMC versus other Ryzen chips, though it's kind of frustrating that I'm learning in bits and pieces (DDR4 Bible and other sources are very helpful). It actually looks like the 4600G (Renoir) has an even more robust IMC than the 5600G (Cezanne), which correlates with my experience. I was able to get 2x16GB Corsair Vengeance up and running at 4200 with 1:1 fclk, without really having any idea what I was doing. It takes more work to get 2x16GB of G Skill Trident Z Neo to run 4000/1:1 with the 5600G. I use the igpu for 1080p gaming, and it's incredibly responsive to memory/fclk overclocking. The 4600G's IMC makes it much more of a competitor to the 5600G (for certain uses) than I understood when I moved to the 5600G.
 
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