Curiositea

Hi there, I have a very odd problem with my new Build. Lemme give you the specs first. CPU: Ryzen 5900X (NEW) RAM: 2 x 2 x 8GB Vengeance LPX 3600Mhz (CMK16GX4M2B3600C18) (Samsung Dies) MB: Asus Crosshair 8 Dark Hero Wifi (NEW) GPU: XFX 7900XTX with Waterblock (fairly new) PSU: BeQuiet Straight Power 10 800W Cooler: Custom Loop with an EKWB Quantum Velocity Waterblock for the CPU. So, i just did a full upgrade from my 6700K+Vega64. They served me good, but as I got a new monitor they just couldn't keep up anymore. I already owned the RAM and it worked fairly well so far. Yesterday i finally got time to assemble the new Build and after everything was set up (loop takes time) i went ahead and started the PC. However i only got the DRAM light and Qcode 0d (reserved for future EMI whatever). This would point to the RAM, the board or the CPU memory controller. I tried it with only 1 Dimm inserted at a time, going through all slots, didn't post, same Qcode. Damn. I then updated the BIOS, cleared CMOS, replaced the CMOS Battery, tried CPU, 1 Dimm and GPU only, still nothing. Damn! Tried without any RAM, same 0d Qcode. Hm. Maybe it's not detecting the RAM. So i reseated the CPU, made sure the Pins were all fine (twice) and reinstalled. Now I could get into the BIOS but only with 1 specific stick in the B1 Slot. No other stick worked, and the working stick (I'll name it No. 27 here as these are the last 2 digits of the serial number) only worked in B1. Okay, so something is definitely wrong here. I reinserted number 27 into the B1 slots again and I get the 0d again. Now I'm a bit confused. I thought maybe it's the CPU mounting pressure, as AM4 seems to be a bit sensitive in that regard. So, i loosened all the Screws on the waterblock and retried, slightly increasing the mounting pressure after each failed attempt. Didn't work. I tried the other sticks, didn't work either. So, i went back and reseated the CPU once again, made sure there are no bent or broken pins again, and check the socket for anything that would be suspicious. Nothing. I now only screwed the waterblock on with literally zero pressure on the CPU (just so it was in place). And I went ahead and installed No. 27 into A2. I'm getting into Bios. Nice! Installed No. 26 into A1. Qcode 0d again. Damn. Put No. 26 into B1. Get into Bios. Nice! Tried putting No. 84 into A1, get Qcode 0d again. Tried it in B2, Qcode 0d. I swapped No 27 and No 26 for No 84 and No 85, and it works. So, the RAM works, as expected. But only in slots B1 and A2. The question now is, is the CPU defective or the Mainboard. Or is there just problem with the mounting pressure? I should mention that I have already tried every possible tiniest change in mounting pressure i could make. But nothing really changed. I unfortunately don't have a second AM4 CPU or MB i could try. Any one has any ideas on who's the culprit here? If you have any further questions, don't hesitate to ask, I'm grateful for any help.

Thanks, but no that wasnt the one. Ffunny thing is, i just found it. I was literally searching for the video for 3 days now, and just after making the post here, it popped back into my mind out of nowhere. Classic. That on was the one i meant. Kinda feel stupid for creating a thread now, but oh well. Thanks anyways.

Hey there, quick question. I remember "watching" a video a few weeks ago, from LTT, where the topic was essentailly if its worth it upgrade from old CPU`s like Skylake, 9th gen etc. to current gen. At the time, i was only listening to the video, with screen off, cause I was at work, thus i cant remember the title, or when it was released. Google and Youtube search brought up more or less nothing. So, does anyone here know which Video i mean? I remeber that the 6700K was mentioned, aswell as the 5800, so it cant be that old. Was the video removed or am i really just too blind to find it? Im currently facing the dilemma of "having to upgrade" my PC. I already got a 7900XTX at launchday and im trying to figure out what to replace my CPU with. Currently thats still a i7-6700K which did me good all those years, but its time for it to go to CPU retirement aka. Homeserver duty. Im leaning towards the 5900X or the X3D aswell as an Crosshair 8 Dark Hero, as i dont really feel the need to spend insane amounts of money for DDR5 and AM5 mainboards. I still got 4x8GB 3600 Vengeance LPX, so thats okay. I have a lot of background stuff running all the time so the 5900X might make more sense than the 5800X3D (also i like to overclock which is a small problem with X3D) Dont get me wrong, im very well informed about the performance data on these chips, i just am really bad at when it comes to actually deciding on what to buy and pulling the trigger. Ill upgrade, def. as the 6700K is bottlenecking the 7900XTX a fair bit, even tho its at 4.96Ghz, i just wanted to rewatch the video in question. Thanks.