System starts but fluctuates during EXPO and MCR events.
System starts but fluctuates during EXPO and MCR events.
Here’s a revised version of your text with varied phrasing and structure:
The specifications from NZXT were shared by ASUS PRIME GeForce RTX 5070 with several key components. This thread aimed to capture as much detail as possible, so I apologize ahead of time for the length. It’s also important to note that this discussion originally appeared elsewhere about two weeks prior, and I’m refreshing the content to reflect the last ten days or so. This means much of what follows is in the past tense, which might feel redundant.
This matter had been ongoing for months, and I initially chose to accept it. Arc Raiders just launched, and I ended up preordering their AREX0024 model, which often caused disconnections. The only solution was a system reboot. Enduring those daily reboots to play the game became exhausting, so I decided to investigate further.
I’m not eager to rush ahead, but I want to highlight that since November 15th, following the Embark update for Arc Raiders, I no longer encountered that error. Reboots were still an issue, but they stopped after a few cycles. Whether the BIOS update or the changes made two days prior resolved it isn’t clear.
The reboot behavior remains consistent when it fails. It usually displays a dark screen for seconds, then shows the motherboard splash before freezing. The display stays on for 20–30 seconds before shutting down completely. The only solution is to power off the machine. Most times it restarts successfully from that cold boot. Occasionally, it loops again until it loads properly.
I should emphasize that I don’t notice significant performance drops otherwise. The system functions normally once it’s fully booted. There are occasional memory compression issues, but they seem unrelated.
This machine arrived in mid-May. I remember turning it on within the first couple of weeks. It shipped with EXPO off, and I started using EXPO1 right away. Around that time, I began struggling with streaming games on Discord. I upgraded the BIOS to version A67 in August, and I suspect that might have triggered the reboot problems.
Further testing this month revealed EXPO and Memory Context Restore (MCR) as potential causes. EXPO1 is set to 6,000 MHz, while EXPO2 is at 5,600 MHz. I experimented with different settings, but results varied widely.
I found that turning off Power Down Enable during testing helped, as keeping it on with MCR off seemed unnecessary. Those tests were limited in scope. I reset the CMOS twice, and both times it resolved the issue for a few days.
On November 13th, I upgraded the BIOS to version 7E51v1A69 (from 7E51v1A67), enabled EXPO2, and turned MCR on manually. The system ran smoothly for about a week. Reboots took longer—around 60–70 seconds, including a brief black screen. After that, the problem resurfaced, taking longer each time.
Last night, I experienced a sudden freeze on the motherboard screen. I powered down the PC, turned it back on, and it froze again. After clearing the CMOS and switching to EXPO1 with MCR enabled, it worked normally. I haven’t tried this exact setup on the A69 yet.
I’m unsure whether the issue stems from firmware, faulty DRAM, a weak IMC, or something else. NZXT suggested the board is problematic and offered a refund for the purchase fee. As this is my only AM5 platform, I can’t independently verify hardware performance.
This situation feels overwhelming. A $2,500 system shouldn’t come with such complications.