On Thu, 2012-10-18 at 16:09 -0400, V G wrote:
> Hi all, just throwing this out on the table here:
>=20
> A PCI-e RAM disk that could make use of your (old) RAM, sit in your PCI-e
> slot, and act as a mass storage unit. A few years ago, there was this uni=
t (
> http://www.newegg.com/Product/Product.aspx?Item=3DN82E16815168001), but t=
hey
> no longer make it. It only DDR2 and had capacity limitations.
>=20
> Most consumer motherboards have a 32GB RAM limit, and it would be nice to
> make a 512GB RAM disk for special tasks (like compiling in RAM, virtual
> machines in RAM, other disk intensive things).
>=20
> There have long been FPGAs with built-in DDR3 controllers as well as PCI-=
e
> controllers. To build a similar device, for example, something with
> multiple slots that can address more than 256GB of RAM would be nice.
>=20
> How expensive and difficult would this be? Most of the logic is already
> there, the only thing really is the electrical engineering (routing,
> layout, etc.) considerations and the memory addressing logic which doesn'=
t
> seem too hard from what I know (I've built a simple memory controller on =
a
> Spartan 3E for my PIC32 in the past).

As is always the case, you have to weigh the pros vs. cons.

Considering the cost of devel, it's VERY likely that a FAR cheaper
solution would be to simply by a mobo with the memory capacity you need.

Yes, most consumer mobos top out at about 32 or 64GB. There are however
MANY mobos out there that support WAY more, I've used ones that support
256GB, and that was NOT the top end.

TTYL

--=20
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