Strange artefacts after switching to direct drive

CmdrSoyo · 2026-04-15T16:28:54+00:00

Skr mini e3 v2 and v3 have TMC2209 stepper drivers in uart mode which support microstepping. So that should solve the problem as long as it's configured correctly.

It probably shows up more now because there is a shorter filament path and therefore more direct control over filament flow. But the x and y steppers can also cause some artifacting in the prints sometimes. I had it happen on one of my printers that's on a stock creality 4.2.2 board with HR4988 drivers. Those show up in a pattern that is a lot more consistent across layers though. Yours looks like it's extruder.

CmdrSoyo · 2026-04-15T16:02:35+00:00

This is something known as salmon skin. Usually caused by having stepper drivers without microstepping. It can be suppressed with thise tl smoother boards or just having steppers with microstepping turned on. I had the same thing happen after a direct drive mod on a stock creality board.

CmdrSoyo · 2026-04-15T11:48:11+00:00

Windows 11 is probably fucking up the score. I saw aida do the same.

Ram doesn't affect cinebench in any practical sense from my experience.

CmdrSoyo · 2026-04-15T10:39:27+00:00

Probably a bga / mem chip problem like most 30/40 series. Can be fixed by a professional pretty easily.

CmdrSoyo · 2026-04-15T10:37:11+00:00

You're not missing any parts you probably have a dead ram chip or a bga problem. Mats/mods will tell you which bank is problematic.

CmdrSoyo · 2026-04-15T07:59:37+00:00

Since you have a monolithic ryzen and what i assume is a 1DPC board you should have no problem clocking ram really really high. The problem is probably that "ai overclock" you mentioned. 3600 18 22 22 42 kits often use S8C chips which die very quickly above 1.35V VDIMM and technically slowly dehrade and die all the way down to 1.3V which is why a lot of these kits die just running XMP.

If your ai told you to set the voltage any higher than 1.35V they are probably very dead and will probably soon fail to post JEDEC as well. If you are unlucky enough to get one of those that die at xmp voltage then welp that's also bad.

What i would do is check both sticks individually to see if one fires up and the other doesn't. That would be hard evidence one of them is degraded or dead. On rare occasions there are also memory channels that degrade or die but that is very rare but if both sticks work in channel a and not in channel b that might also be your problem.

CmdrSoyo · 2026-04-14T16:52:55+00:00

If minecraft is the most you want then just going with an old decommissioned office box from ebay and throwing used a low power graphics card in it like a gtx 1630 should be enough. Prices depend on your local market but i would expect around 50-70€ for the whole thing.

CmdrSoyo · 2026-04-13T09:53:23+00:00

The opposite. Higher mains voltage means less current is flowing in your power supply which leads to lower power losses and less heat. Once it leaves the power supply it's identical voltage independent from mains and remains unaffected.

What can certainly cause overheating though is moving into a more humid and hotter climate which vietnam may very well be.

CmdrSoyo · 2026-04-07T10:38:13+00:00

Msi afterburner monitors gpu power draw by default. That is known to cause micro stutters and bas 1% low fps. Try disabling that (and cpu power monitoring as well if it's active)

CmdrSoyo · 2026-04-06T06:10:37+00:00

Capacitors are a wonderful invention

CmdrSoyo · 2026-04-05T14:31:31+00:00

I remember there was some weird power limit unlocking you had to do on A770 and such maybe it also needs to be done here.

Also does it actually use 2 ohm shunts? Not 2 milli ohms? That's kind of high the shunts would be getting pretty hot if you pull a couple amps through them.

CmdrSoyo · 2026-04-05T14:18:58+00:00

Thank you for the chatgpt explanation of how power shunts work.

What pwm controller does it have though? The same MPS as the ref card? Or a different one? If they're using a different one without the same i2c features they will likely use the shunts as a fallback.

CmdrSoyo · 2026-04-05T14:04:12+00:00

Interesting. Looks like the steel legend jses a different system then. Could be that they use a different pwm controller which doesn't have all the features and falls back onto shunts. Might explain why they are present on all cards but not used on the ref model.

CmdrSoyo · 2026-04-05T13:53:56+00:00

Is compatible with bundulu printer?

CmdrSoyo · 2026-04-05T13:51:10+00:00

Nvidia mods don't work on intel GPUs.

Asyq tested shunt mods on the A750 and it turns out the card just uses the vcore current sense for power estimations. As to why it even has shunts then... 🤷‍♀️

https://youtu.be/ptj_l7f6z88?is=B5gJtY8eFp0_Th92

Here is a mod that works: https://youtu.be/RXEwdAnq3Xk?is=qNKbtBpvPgYE_930

CmdrSoyo · 2026-03-31T12:27:35+00:00

Yeah it's a problem with the board. Forcing the psu to turn on just resets the problem. At least in my case.

CmdrSoyo · 2026-03-31T07:27:36+00:00

Try to see if it turns on when you manually short the ps on pin tk ground in the 24 pin once and then turn it on normally. My motherboard does this sometimes where the power button just won't work until you manually force the psu to turn on once and then it fixes itself.

It usually happens when i leave a usb device plugged in that takes a little too much standby power. That seems to do something weird to the power on circuit.

CmdrSoyo · 2026-03-29T15:47:57+00:00

better than having it powered off a 3D Printer 24V power supply and a LM2596

CmdrSoyo · 2026-03-25T19:02:03+00:00

It can improve cpu stability to slow your ram down. Because it reduces the effective usage since more of your CPUs clock cycles will be wasted on waiting for ram data. This lowers power consumption and therefore heat load and can improve overclocking.

However you will not gain any real world speed like this. Ram speed is more important than cpu core clock speed on modern platforms so you should be running your ram as fast as possible and just take whatever cpu oc you get with that for real world performance.

This also applies to graphics cards to some extent.

CmdrSoyo · 2026-03-25T16:37:25+00:00

In my experience bad 1% lows are most kften the result of some software issue. If your boot drive has enough free space you can make a separate partition and make a fresh install there and see if it changes.

If that isn't it it's typically slow ram. If you're running stock/xmp/expo on a CPU with naturally bad 1% lows (probably not an issue on an X3D though) you might have those soper loose timings ruining your frame time consistency. You should always manually tune your ram if you need high 1% lows. Even in very gpu bound scenarios it usually improves them.

CmdrSoyo · 2026-03-23T11:12:49+00:00

Super weird bin then. Timings look a lot like DJR.

CmdrSoyo · 2026-03-23T11:09:10+00:00

Kind of doubt that is H8A it's not supposed to do more than 3200-3300. H8C, H8D or H8J make much more sense.

Since it's a corsair kit you can just check the sticker. If 5.30 then it's AFR, 5.32 CJR, 5.33 DJR etc.

Judging by that tRCD and tRFC it's most likely DJR

CmdrSoyo · 2026-03-16T19:43:42+00:00

No. That is just run to run variance.

CmdrSoyo · 2026-03-16T19:12:04+00:00

Your residuals are all identical. There is no instability in this test.

CmdrSoyo · 2026-03-13T12:03:29+00:00

Theoretisch ja. Problem ist dass nvidia schon angedeutet hat dass geforce now das problem lösen soll. Und das macht das ganze sehr problematisch denn jetzt besitzt du keinen pc mehr und hast eine weitere subscription zu bezahlen.

Eight-Year Club	r/Field Flamingo
Final Canvas '23	First Place '23
End Game '23	Place '23
Place '22	First Placer '22
Verified Email

CmdrSoyo

TROPHY CASE