8GB DDR3 dimms are out now?

[Idontcare]

Was doing my usual monthly perusal for 4GB dimms and saw that newegg has an 8GB dimm listed, actually its a 3x8GB kit for $1660.

When did the 8GB dimms start to come out? I totally missed that whenever it happened.

 

[BTRY B 529th FA BN]

Looks like server memory and at a good 1.5v

 

[ilkhan]

holy....NOW GIVE US SOME CHEAPER 4GB DIMMs.
Im running 4x2 right now but when I move back to a laptop I'll only have 2 slots and I want to keep 8GB.

Still, wow, thats a lot of ram. Who wants a 48GB i7 system? Enough space to ramdisk a whole lan party worth of games. Im not sure which Id rather do, load the games onto the ramdisk or leave them open in between games (in the background). Hell, do both!

 

[Idontcare]

Originally posted by: ilkhan
holy....NOW GIVE US SOME CHEAPER 4GB DIMMs.
Im running 4x2 right now but when I move back to a laptop I'll only have 2 slots and I want to keep 8GB.

Still, wow, thats a lot of ram. Who wants a 48GB i7 system? Enough space to ramdisk a whole lan party worth of games. Im not sure which Id rather do, load the games onto the ramdisk or leave them open in between games (in the background). Hell, do both!

For me I'd want 48GB if I had to keep 8 threads fully loaded, let alone 12 threads with an i9. The apps I run now consume about 2GB/thread.

I can get away with a quad-core and 8GB of ram in one box but if you gave me more thread capability without more ram (x58 does give me 2 more slots at least, but I need 4) slots or higher dimm density then my apps are just thrashing the disk drives anyways as they compete for data access.

I was really hopeful when x58 and i7 came out that we'd see some enthusiast mobo's sporting 9 dimms since the i7 IMC supports it. TMK none are available outside of the non-overclockable WS boards.

A dream rig for me would be a 2S i9 @4-5GHz with 18 dimm slots and I'd need a minimum of 4GB dimms in there. Until we get to that point it will be "cluster of boxes" in my basement for me.

 

[jkresh]

would be nice to see some enthusiast 4gig sticks soon (if 8gig server ones are out), have thought about going to 12, but going to 3*4 vs 2*6 would be better (not sure if I need/would get anything out of 18 at the moment but there are times when 6 is not enough)

 

[ilkhan]

Originally posted by: Idontcare
I was really hopeful when x58 and i7 came out that we'd see some enthusiast mobo's sporting 9 dimms since the i7 IMC supports it. TMK none are available outside of the non-overclockable WS boards.

I thought nehalem is limited to two slots per channel...

 

[Emulex]

nehalem is 3 channels, per socket.


so on a dual X5570 server (or mac pro) you'd do for the cheapz:
UDIMM is 6x1gb or 6x2gb or 6x4gb at DDR3 1333

RDIMM (its registered and buffered) is different in that it works any dual mode and mixed mode as long as its RDIMM. its also terribly expensive and the only way to use the 2nd and 3rd channels.

however when you add that 7th dimm you'll drop one speed level. when you add that 16th dimm you'll be down to 800mhz.


6 dimm UDIMM=1333
12 dimm RDIMM = 1066
18 dimm RDIMM = 800

i spose with one socket you'd halve those values.

 

[aka1nas]

Originally posted by: ilkhan

Originally posted by: Idontcare
I was really hopeful when x58 and i7 came out that we'd see some enthusiast mobo's sporting 9 dimms since the i7 IMC supports it. TMK none are available outside of the non-overclockable WS boards.

I thought nehalem is limited to two slots per channel...

Back during the previous IDF, Intel specifically said it could handle 3 per channel with unbuffered memory, for 9 slots total on socket 1366.

 

[ilkhan]

interesting. Looks like newegg has some 18 slot boards (dual s1366), but nothing with 9 slots, server or consumer.

 

[Idontcare]

Originally posted by: ilkhan

Originally posted by: Idontcare
I was really hopeful when x58 and i7 came out that we'd see some enthusiast mobo's sporting 9 dimms since the i7 IMC supports it. TMK none are available outside of the non-overclockable WS boards.

I thought nehalem is limited to two slots per channel...

The hardware in the CPU and socket is there for three slots per channel, but the mobo guys decided only to do six so far. Just like for some mobo's they only did three, one for each channel.

For reasons that are quite understandable to me because there is just so few apps that actually need that kind of memory. On desktop segment, for most desktop apps, 9 slots is gratuitous...of course so too is 8 threads at 4GHz but we have that anyways.

 

[ilkhan]

Id like to see some single socket workstation boards with 9 slots at least.
Anyway, 8GB DIMMs, awesome.

 

[Idontcare]

More than you ever wanted to know about Nehalem and the ramifications of memory configurations involving 9-dimm and 18-dimm setups:

The numbering on the left indicates the memory channels and the numbers on the right indicate the number of DIMMs per memory channel (which ?bank?). Notice that you can have only 3 DIMMs per memory channel (this is a limitation from the architecture and not a Dell imposed limitation). For a two-socket system you can have a maximum of 18 DIMM slots.

http://en.community.dell.com/b...ry-configurations.aspx

The guy goes on to thoroughly beat the horse to death, in glorious mind-numbing detail.

And you are right, a quick glance thru the supermicr/tyan/asus offerings and nobody seems to be offering single-socket nehalem's with 9dimms. Not sure why, must be no market for them to pursue? I guess if you were going to buy a 9-dimm board then you probably are interested in a 2S board anyways.