I think the bootloader is seeing more RAM than is actually there. Regions 0-15 are contiguous, except for a 256kB hole at 640kB, and total 2.25GB (2304MB) memory. Not sure about regions 16 & 17, but they're tiny (~13MB). Region 18 is exactly 510GB, so we have 2.25 + 510 = 512.25 GB, or 256MB more memory than is actually installed in the system.
And in relation to Mike's comment, that 510GB region starts at 4GB, so it does indeed go past 512GB. For comparison, here's my output from what should be very similar hardware -- a Dell R230 with 8GB: >> OpenBSD/amd64 BOOT 3.33 boot> machine memory Region 0: type 1 at 0x0 for 624KB Region 1: type 2 at 0x9c000 for 16KB Region 2: type 2 at 0xe0000 for 128KB Region 3: type 1 at 0x100000 for 2036884KB Region 4: type 2 at 0x7c625000 for 131104KB Region 5: type 1 at 0x8462d000 for 145860KB Region 6: type 4 at 0x8d49e000 for 4KB Region 7: type 1 at 0x8d49f000 for 2304KB Region 8: type 2 at 0x8d6df000 for 25132KB Region 9: type 4 at 0x8ef6a000 for 192KB Region 10: type 3 at 0x8ef9a000 for 312KB Region 11: type 1 at 0x8efe8000 for 96KB Region 12: type 2 at 0x8f000000 for 16384KB Region 13: type 2 at 0xe0000000 for 262144KB Region 14: type 2 at 0xe00fd000 for 4KB Region 15: type 2 at 0xfd000000 for 24576KB Region 16: type 2 at 0xfe000000 for 68KB Region 17: type 2 at 0xfec00000 for 4KB Region 18: type 2 at 0xfed00000 for 4KB Region 19: type 2 at 0xfed10000 for 32KB Region 20: type 2 at 0xfed18000 for 4KB Region 21: type 2 at 0xfed19000 for 4KB Region 22: type 2 at 0xfed84000 for 4KB Region 23: type 2 at 0xfee00000 for 4KB Region 24: type 2 at 0xff400000 for 12288KB Region 25: type 1 at 0x100000000 for 6029312KB Low ram: 624KB High ram: 2036884KB Total free memory: 8215080KB ==== (pasted from a serial console, so no typos) I likewise have 2.25GB (2304MB) at the start, then 256MB in region 13 (the 4kB in region 14 overlaps this), and then 5.75GB (5888MB) in region 25 (regions 15-24 total ~36MB). Wait a minute, that also adds up to 256MB (+36MB) more RAM than I have installed (8.25 vs 8 GB), but my system boots fine. Now I'm more confused... I don't know what to make of the extra 256MB, but it's possible your system's crossing the 512GB boundary may be the issue. -Andrew
