@star memtest86+ doesn't seem to have many options in that regard. mouse switched testing from all cores in parallel to round robin in the hopes that may slow it down, but it doesn't think so and the errors remain similar. very tight error mask in a small range
@star ohh. well this machine has literally not a single setting regarding ram, timings, clock speeds or anything of that matter. it's a workstation and not built for much tinkering