Messages in this thread | | | Subject | Re: BIOS detects 4 GB RAM, but kernel does not | From | Andi Kleen <> | Date | 30 Jul 2006 00:21:59 +0200 |
| |
Robert Hancock <hancockr@shaw.ca> writes:
> Athlon 64/Opteron CPUs have support for moving this part of the RAM > above 4GB to allow it to be used. This is part of the CPU's on-die > memory controller so no special chipset support is needed.
In cheap boards >3.5GB RAM configurations are usually not officially supported by the vendor (= not tested) and there are systems where it doesn't work when enabled in the BIOS (doesn't work = kernel crashes randomly when accessing bad memory ranges)
I guess it's a subtle hint that above 3GB of RAM you should be using ECC DIMMs anyways, which need a more expensive workstation class board.
-Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |