z390, 9700k: can high BCLK (150+ Mhz.) cause instability?

[Jey]

I have an asrock z370m running on bclk 150 with i5 8600k cpu and rtx 4080. FCLK 800 is stable by setting bootmode from max performance to battery mode. For FCLK 1GHz I had to raise pch voltage from 1.1 to 1.15v. I also replaced the pads of the mainboard heatsinks with good ones to keep temperatures low. 150 MHz is perfect to get same frequencies for cpu/cache/ram as on 100 MHz BCLK. Frametimes and also loading spikes from the nvme are much better in afterburner at 150 MHz. Only thing not working correctly anymore at that speed is my external HDD.

 

[ShrimpBrime]

8700K 380mhz bus clocks

Intel Core i7 @ 3040.04 MHz - CPU-Z VALIDATOR

[vrninc] Validated Dump by ShrimpBrime (2021-12-12 06:04:09) - MB: Asus ROG MAXIMUS X HERO - RAM: 16384 MB

valid.x86.fr

 

[Jey]

wow. absolutely crazy. did you noticed further advantages for the system or is it just for fun?
Do you run 400MHz FCLK?

 

[ShrimpBrime]

wow. absolutely crazy. did you noticed further advantages for the system or is it just for fun?
Do you run 400MHz FCLK?

Hi! I'm not sure if you're asking me, or just in general, but love to share thoughts. So here goes.

Yes, that system did in fact run over 400 bus clocks. But there's draw backs to it and no benefit at all.

Because if you notice the really low cpu multiplier and frequency, that's how it has to be ran.

With an 8 or 9x multiplier and 2 fists full of settings it's possible. Ran pretty stable, but with roughly 1500mhz frequency reduction to accomplish it.

It was just for fun.

I saw tremendous gains with Intel 13th gen 13600KF running 110 bus clocks stable. Well at least for benchmarking and the cooling it was.

12th gen processors will bclk as well. These are not locked as long as you have a capable motherboard, I've had my 12400F well over 5ghz.

13th gen was cut off at the knees due to ME firmware and software updates. This performed way better than multi only OC. Shame Intel monopolized the stuff.

 

[ThrashZone]

Hi,
Yeah blk at 150

Learn how to oc properly please

 

[ShrimpBrime]

Hi,
Yeah blk at 150

Learn how to oc properly please

Bro. If you can NOT reach 150 bus clocks, you need to learn how to OC properly.

Get out with that useless crap posting please. It's this, or I gotta hit the report button.

 

[ThrashZone]

Hi,
Yeah an 8700k I wouldn't care what happened to it

 

[ShrimpBrime]

Hi,
Yeah an 8700k I wouldn't care what happened to it

So your "ghetto rigs" in your profile can't bclk, or you just don't know how to. You have no place for judgement of overclocking here.

191 clocks on X58 cause you don't care. I can do this all day.

 

[damric]

So your "ghetto rigs" in your profile can't bclk, or you just don't know how to. You have no place for judgement of overclocking here.

191 clocks on X58 cause you don't care. I can do this all day.

View attachment 324923

base clock overclocking separates the padawans from the gray beards

 

[ShrimpBrime]

base clock overclocking separates the padawans from the gray beards

Lol, true that.

But can Padawan learn??...

 

[ThrashZone]

Hi,
Easy on the blk man yall knocking out the TPU server

 

[Dr. Dro]

So your "ghetto rigs" in your profile can't bclk, or you just don't know how to. You have no place for judgement of overclocking here.

191 clocks on X58 cause you don't care. I can do this all day.

View attachment 324923

If I recall correctly (been a while) Bloomies and Gulftowns could do 200 on a good chip, but it had one hell of a clockhole problem, you could get 170 or 190 stable but not 180 for example. Or at least I used to be very inexperienced at the time. My i7-920 would hate that, many years later I managed to try on a 965 (extreme edition bloomy stepping C0), but since that had the multi unlocked, lot less effort to get them to clock high. My 990X loved to OC by the multi as well

 

[ShrimpBrime]

If I recall correctly (been a while) Bloomies and Gulftowns could do 200 on a good chip, but it had one hell of a clockhole problem, you could get 170 or 190 stable but not 180 for example. Or at least I used to be very inexperienced at the time. My i7-920 would hate that, many years later I managed to try on a 965 (extreme edition bloomy stepping C0), but since that had the multi unlocked, lot less effort to get them to clock high. My 990X loved to OC by the multi as well

Gotta 980X hit some 5.5ghz with that one think
it was. Hate the clock holes, most chips can jump it. They are v-core hungry most of my chips. I need a better kit of memory though.

That 930 will go more, just at the constraints of an air cooler right now.

 

[Jey]

Multi OC is the easy way so usually theres no need to bclk. My CPU is already delidded and running 4,8ghz allday with a small blackridge cooler and 1600 rpm silent fan. It maxed out at 5ghz but due to 135w wattage restriction of the board and cooler capability it clocks multitasking down and exeeds 90c, so 4.8 is perfect and stable. the 4080 is running at 2970Mhz clock and 12500 Mhz RAM. So raising the bclk is the only thing left here to squeeze some points out of the system. next week the board gets 4000er cl14 ram, maybe this gives a further boost.

 

[Solaris17]

base clock overclocking separates the padawans from the gray beards

We're out here just quiet. I miss my nforce4 pencil mod for sata2 and sli support. fsb clocking durons with pci locks. Before BIOS ratios existed. Using jumpers to set bus speed. Throwing coolers on your southbridge.

Dont cite the deep magic to me witch, I was there when it was written.

 

[ShrimpBrime]

We're out here just quiet. I miss my nforce4 pencil mod for sata2 and sli support. fsb clocking durons with pci locks. Before BIOS ratios existed. Using jumpers to set bus speed. Throwing coolers on your southbridge.

Dont cite the deep magic to me witch, I was there when it was written.

Oh snapp going 33mhz to 66mhz bus clocks. Just change 2 rows of jumpers. XD good days. Mounting tower coolers to slotted processors was hilarious fun.

The industry has a strong clamp on what we want to call overclocking any more.

 

[Jey]

yes I also remember overclocking bartons by closing the cpu bridge. clockholes and strange fsb behavior. Today overclocking is not easier everytime but far more stable.

 

[damric]

been playing with this little Sempron today. The poor thing is 100% core usage at idle

Luke`s 4480.6 MHz score: CPU Frequency with aSempron 145

The Sempron 145 @ 4480.6MHzscores getScoreFormatted in the CPU Frequency benchmark. Lukeranks #null worldwide and #140 in the hardware class. Find out more at HWBOT.

hwbot.org

 

[ShrimpBrime]

been playing with this little Sempron today. The poor thing is 100% core usage at idle

Luke`s 4480.6 MHz score: CPU Frequency with aSempron 145

The Sempron 145 @ 4480.6MHzscores getScoreFormatted in the CPU Frequency benchmark. Lukeranks #null worldwide and #140 in the hardware class. Find out more at HWBOT.

hwbot.org

More v-core!!

Underclocked one of the am2 semprons years ago. Cooled it with a fan on the IHS plate. Think it did 2.2ghz at like .85v or somewhere near abouts.

 

[damric]

More v-core!!

Underclocked one of the am2 semprons years ago. Cooled it with a fan on the IHS plate. Think it did 2.2ghz at like .85v or somewhere near abouts.

yeah I'm going to take it up to 1.8v or so, hell maybe higher. It's barely above room temperature.

 

[ShrimpBrime]

yeah I'm going to take it up to 1.8v or so, hell maybe higher. It's barely above room temperature.

Yep. Little dry ice, maybe no cold bug on a C3? I honestly don't remember. I don't think there's cold bug, Phenom II core was full ln2 pot.

2v

 

[damric]

Yep. Little dry ice, maybe no cold bug on a C3? I honestly don't remember. I don't think there's cold bug, Phenom II core was full ln2 pot.

2v

I'm happy to stay near the top of the enthusiast league, so no sub-ambient for the time being

 

[Mussels]

Bro. If you can NOT reach 150 bus clocks, you need to learn how to OC properly.

Get out with that useless crap posting please. It's this, or I gotta hit the report button.

I'm way too late to the party, but play nice.

We POLITELY tell him those are rookie numbers and he needs to OC harder

 

[Bones]

Yep. Little dry ice, maybe no cold bug on a C3? I honestly don't remember. I don't think there's cold bug, Phenom II core was full ln2 pot.

2v

CB/CBB is possible but rarely, if ever seen in the first place.
For things like an Athlon or even a Sempy it could be different due to their own architecture but even with that I'd have to say CB/CBB isn't that big of a deal to worry about.

Only AM3 chip I know would have a good possibility of CB/CBB are Heka core (C2) chips, those are known to be funky under sub-zero temps.
I've got one (Phenom II x3 720 BE) and luckily it seems to like the cold but it's a bit of an exception, not the rule others seem to go by themselves.

I'm way too late to the party, but play nice.

We POLITELY tell him those are rookie numbers and he needs to OC harder

Yes he does...... And I certainly do too.
Bones`s SuperPi - 32M score: 11min 51sec 703ms with a Phenom II X3 720 BE

Note for anything related for Intel, it's already been proven high(er) BCLK is possible, even useable too as results already seen here have shown - I'm also aware of others that have done it aside from the examples you see here.
Nothing wrong with it, in fact the ability to raise the bus makes the system easier to tweak for better performance and efficiency too.

 

[ShrimpBrime]

I'm way too late to the party, but play nice.

We POLITELY tell him those are rookie numbers and he needs to OC harder

Well, that was about as polite as I get. Using the same method of communication as the other person uses often times help get the point across. .

I'll try to do better.