upgrade from ubuntu 10.04 to Jessie on multiboot?

According to the website provided by tjmarch in the ubuntu 14.04.1 linuxcnc help topic, the kernel should be able to access 64gb.
quote from website provided,
"With PAE, IA-32 architecture is augmented with additional address lines used to select the additional memory, so physical address size increases from 32 bits to 36 bits. This increases the physical memory addressable by the system from 4 GB to 64 GB. The 32-bit size of the virtual address is not changed, so regular application software continues to use instructions with 32-bit addresses and (in a flat memory model) is limited to 4 gigabytes of virtual address space. Operating systems supporting this mode use page tables to map the regular 4 GB address space into the physical memory, which, depending on the operating system, may be as big as 64 GB. The mapping is typically applied separately for each process, so that the extra memory is useful even though no single regular application can access it all simultaneously."
Im just being stubborn to try and get the functionality out of the 64bit. Plus I have a band and was hoping to use it for audio recording as well. So in that aspect, it would be better for me, personally, to use the 64bit.

If you read near the end of ubuntu 14.04 help , tjmarch provides a script that works very well for 64 bit ubuntu and linux mint. I cant recommend it whether its better or not but its seems to work ok on a laptop, so shoud work well on other platforms? i do sugest changing to the gnome shell if you choose ubuntu though. although my kids prefer unity ( due to the simularitys to tablet format..)

Thanks.

Right now I am working on the electrics of the machine. I don't know when the mesa boards will arrive. If it takes a while, then the 64 bit version should be more mature by then.

For now, I am getting, without the mesa boards:

servo thread 1ms 11726
base thread 25us 13376 (u for micro)

Those numbers are the result of taxing the system with graphics and network access in browser tabs for eight hours, which I think is very good. I'd hate to upset that, so I plan to wait until some reports come in on the 64 bit in live systems.

I realize that I am running servos, and maybe I don't need such low latency. But the lower the better I think. Also, once I get four axes running in servo, I may end up using steppers in other parts of the system.

I very much appreciate the heads up. I'll try to stay on top of any forum posts relevant to the 64 bit releases of 2.7 and above.

Agaian, i cant report for the improvement of a 64 bit system but if u have time and are not doing anything else, i suggest following the script provided by tjmarch in the topic i told you about. try the mint install, and let me know how it goes. also what type of computer are u running on? i may have some latency reducing tips for you.. im getting simular latency out of a laptop, so the methods may get you much better results.

P.S. the script is at the end of page 6

Razor_keen wrote: try the mint install, and let me know how it goes. also what type of computer are u running on? i may have some latency reducing tips for you.. im getting simular latency out of a laptop, so the methods may get you much better results.

I am using a Gigabyte E-350N Win8 motherboard, with just one expansion slot (PCI).

I would be interested in what you have done to reduce latency. I'll be looking at the mint install as well.

Thanks again.