32GB ddr3-1066 ecc reg dimms $99

[RobstarUSA]

"> 10"...32GB DDR3 PC3-8500R 1066 4Rx4 ECC Reg Server Memory RAM Hynix HMT84GR7MMR4C-G7 | eBay

 

[RobstarUSA]

16 more for $1 more...
1X 32GB Hynix HMT84GR7AMR4C-H9 4Rx4 PC3-10600R ECC REG 1.5V DDR3 | eBay

 

[RobstarUSA]

Qty 48: DDR3L and 1600mhz for $115...

1X 32GB DDR3 Dataram 64802 4Rx4 PC3L-12800L ECC REG LRDIMM | eBay

 

[wildpig1234]

i guess these are only needed when you really need more than 256gb ram. otherwise you are really paying a lot of premium over the normal ddr3 price....

 

[BLinux]

love it! but i need it to come down to about $80/32GB ... would be great to upgrade my VM hosts... RAM is the first resource that runs short.

 

[BLinux]

btw, some of those are just regular RDIMMs, while some of them are LR-DIMMs, I don't think they will mix well in case someone is buying from multiple listings and planning to use them together...

 

[nthu9280]

@BLinux, you are correct. RDIMMs and LRDIMMs can't be mixed.
Hopefully 32gb DDR3 RDIMMs start coming in price soon. At this time, 16gb appears to be still the best value.

 

[wildpig1234]

yeah, rdimm still cheaper... i paid $400 for 16x 16gb rdimm ddr3 a while back... i don't think i would like to pay 2x premium just to get 32gb lrdimm. 

 

[realtomatoes]

yeah, rdimm still cheaper... i paid $400 for 16x 16gb rdimm ddr3 a while back... i don't think i would like to pay 2x premium just to get 32gb lrdimm. 

that was a sweet deal

 

[wildpig1234]

yeah, that was a while back.... ddr4 used to be a lot cheaper too..

 

[Evan]

I don’t remember seeing any 32gb ddr3 rdimm, was there any around ? I thought most were lrdimm

 

[nthu9280]

Guess they do exist. I have never been looking for them due to the price/GB.
This one is more expensive but 10600R instead of OP's 8500R.

M393B4G70DM0-YH9Q2 Micron / Crucial.

 

[pchangover]

read that as ddr4 and was super excited haha

 

[BLinux]

Ok, I need help with this 32GB 4Rx4 thing... as I haven't used such dense RDIMMs or LRDIMMs before in a DDR3 Supermicro X9 system. If I look at the motherboard manuals for some sample Supermico X9 systems like:

X9DRH-7F: using 4Rx4, 32GB RDIMM (with v2 CPU), it say (DPC=DIMM per Channel):

1DPC+1.5V: 1066
1DPC+1.35V: 800
2DPC+1.5V: 800
2DPC+1.35V: 800

So, 800 is PC3(L)-6400R, 1066 is PC3(L)-8500R, right? It would seem no matter what configuration, I'm not going to need faster than PC3(L)-8500R; regular voltage/low voltage, 1DPC, 2DPC, zero need for anything faster than 8500.

If I look at 32GB LR-DIMMs with v2 CPUs:

1DPC+1.5V: 1066~1866
1DPC+1.35V: 1066~1600
2DPC+1.5V: 1066~1600
2DPC+1.35V: 1066~1600

So, in this case, unless I use 1.5V LR-DIMMs and 1DPC, the fastest it will go is 1600, so PC3(L)-12800L.

Since memory controllers are integrated into CPU here, I would think non-Supermicro systems have similar constraints? (I don't know for sure, asking here...)

So, then, my question is, why would i ever want to buy anything faster than PC3-8500R for 32GB RDIMMs? it would seem pointless to pay more for anything faster? The LR-DIMMs make more sense, at least then can go up to PC3-12800L speeds, or higher if using 1DPC configuration.

one of the listings in this thread is "32GB Hynix HMT84GR7AMR4C-H9 4Rx4 PC3-10600R", is there a reason for this speed to exist?

 

[Evan]

Although the CPU has limits so do the boards sometimes, eg I see higher performance on a HPE box at 2dpc than some SM boards from memory.

But yes your right as the memory size or about increases in general performance takes a hit such that buying fast stuff is often less purposeful.

 

[BLinux]

Although the CPU has limits so do the boards sometimes, eg I see higher performance on a HPE box at 2dpc than some SM boards from memory.

But yes your right as the memory size or about increases in general performance takes a hit such that buying fast stuff is often less purposeful.

so, you are saying that on other systems like HPE, memory like "32GB Hynix HMT84GR7AMR4C-H9 4Rx4 PC3-10600R" does make sense because it will run at the higher speeds even in 2DPC configuration?

 

[Evan]

so, you are saying that on other systems like HPE, memory like "32GB Hynix HMT84GR7AMR4C-H9 4Rx4 PC3-10600R" does make sense because it will run at the higher speeds even in 2DPC configuration?

Correct from my memory that’s exactly the case.
In general all memory runs at rated speed or 1 less in 2dpc, in 3dpc the speed drops a lot.
(From memory this is, I would have to confirm the rdimm/lrdimm table to be sure but certainly how I remember it)