Setting up a new GPU led to the CPU using half the available RAM during startup.
Setting up a new GPU led to the CPU using half the available RAM during startup.
I made these changes to reach this point: Added a [RX7600] GPU, swapped it in from a [GTX960] model on a [B450-ITX] motherboard with a [R1600] CPU. Steps in order: [2x32GB] RAM features XMP frequency 3600Mhz and XYZ timings. The system wouldn't boot with the higher XMP profile—possibly due to the first-gen Ryzen IMC issue. I kept it at a lower frequency [1x3533Mhz, 2xXYZ] for stability. Recently acquired the GPU; after uninstalling DisplayDriverUninstall, swapping it, and updating drivers, everything worked fine. Radeon software suggested a reboot, which coincided with losing half the RAM. I tried troubleshooting: checked online for similar problems (none helped), tested BIOS/UEFI detection, RAM slots, and memory settings. Even downclocking caused a temporary BIOS reset but allowed normal adjustments. I don’t have warranty on the motherboard but do have coverage for RAM. I’m hoping it’s not the motherboard itself.
I always reset the CMOS after any hardware changes. As noted, any chip speed below 2667MHz failed to boot. Comparing speeds like 3600MHz, 3200MHz, and 2400MHz hasn't helped much. Since my previous discussion: I discovered old [2x8GB] RAM and installed it, but the issue persisted. Using DDU confirmed the same problem. Swapped the GTX 960 for the RX 7600, and the issue disappeared. I’m unsure what this means. Possible causes could be power supply or configuration. My setup includes a 550W PSU, an 8-core Ryzen 1600 CPU, four HDDs, and a single M.2 SSD. I’m mostly using Linux, with Windows only for specific tools like OC utilities and CS2. It helps to have diagnostic tools like OCCT available. I’m sharing this because a solution that works on Linux but not Windows might be valuable. Evidence includes: 1) RX 7600 with no drivers, 2x8GB RAM; 2) RX 7600 with no drivers, 2x32GB RAM; 3) mental image of a working RX 7600 with no drivers and larger RAM.
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Configure RAM at 2400MHz using two dual-rank modules on a Ryzen 1600 processor
Installation troubles with RX 7600 and RAM issues The hardware is detected but only half the memory appears. Specific specs and setup details are shared. RAM problems persist despite replacing GPU and reseating components. Some distros still show full capacity, others partial. Rebuilding PC parts helped resolve the issue.