Xubuntu 64-bit can't boot into live CD IOMMU

[metalf8801]

I'm trying to install Xubuntu 8.10 64-bit and I'm getting a error message before the live cd even boots

[ 0.004000]Aperture Beyond 4GB Ignoring
[ 0.004000]Your Bios Memory doesn't leave a aperture memory hole
[ 0.004000]Please enable the IOMMU option in the bios setup
[ 0.004000]This costs you 64mb of ram


so I look around in my BIOS for a while and I can find anything at said IOMMU


I installed Kubuntu 7.10 64-bit last year without any problems and I have Ubuntu 8.10 32-bit installed right now

I don't know what info would be helpful so I'm just going to post all the hardware sorry if its over kill

Foxconn N570SM2AA-8EKRS2H AM2 NVIDIA nForce 570 SLI MCP ATX AMD Motherboard

A-DATA 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)

AMD Athlon X2 4850e 2.5GHz 2 x 512KB L2 Cache Socket AM2 45W Dual-Core Processor

LG 20X DVD±R DVD Burner w/ SecurDisc Tech Black SATA Model GH20NS15

SAMSUNG 20X DVD±R DVD Burner Black SATA Model SH-S203B

Western Digital Caviar SE16 WD2500AAKS 250GB 7200 RPM SATA 3.0Gb/s Hard Drive

Western Digital Caviar GP WD5000AACS 500GB 5400 to 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive

XFX PVT73EYARG GeForce 7300GT 512MB 128-bit GDDR2 PCI Express x16 SLI Supported Video Card

also I found this post but I don't know what its says because its not in English
http://ubuntuforum-pt.org/index.php?topic=42710.0


If anyone could suggest what I should do next that would be great

Thanks
Dan

[Partyboi2]

Have you tried using iommu=soft as a boot option as mentioned here (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/203537)?