MP 6,1 Never mind

[MisterAndrew]

Never mind

(This post was about 1866 MHz 32GB RDIMMs, but user Another1 pointed out that regardless of speed, the quad ranked RDIMMs will operate at reduced speed due to limitations of the Xeon CPUs.)

 

[MikkelAD]

Has anyone noticed these before? Apparently they are available. SK Hynix lists them as Mass Production.

These are the 32 GB version of the later 16 GB RDIMMs Apple supplied (B-die): HMT84GR7BMR4C-RD
Also available as newer D-die: HMT84GR7DMR4C-RD
(There's also the earlier A-die, but it appears to be EOL'd: HMT84GR7AMR4C-RD)

They just don't seem to be widely available. I found one online store that lists them. It says price on request.

Hynix 32GB DDR3 DIMM PC3-14900 1866MHz ECC-REGISTERED 240-PIN 36-CHIP 2Gx4 4Rx4 CL13 1.5V Mfr Part# HMT84GR7BMR4C-RD - Hynix - Manufacturers

<table style="width: 375px; height: 192px;" border="0" cellspacing="0" cellpadding="0"><colgroup><col width="255" /> <col width="266" /></colgroup> <tbody> <tr> <td class="xl65" width="255" height="20"><strong>Manufacturer</strong></td> <td> Hyni

www.deluxecomp.com

View attachment 923929

Interesting but I have always thought the Mac Pro 2013 was limited by the chipset in regards to ram?

More Options for 128 GB Mac Pro RAM Upgrades Now Available

Earlier this month, Transcend announced the launch of 128 GB RAM kits for the new Mac Pro, offering users willing to spend nearly $2500 the...

www.macrumors.com

"... OWC's will run at 1066 MHz due to limitations in Intel's chipset for addressing the higher capacity of RAM."

 

[MisterAndrew]

Nevermind

 

[MikkelAD]

No, I don't think so.

What about these?

Hynix 128GB 4X 32GB PC3-14900L 1866Mhz DDR3-240Pin Registered LRDIMM Memory Ram | eBay

Find many great new & used options and get the best deals for Hynix 128GB 4X 32GB PC3-14900L 1866Mhz DDR3-240Pin Registered LRDIMM Memory Ram at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[MisterAndrew]

What about these?

Hynix 128GB 4X 32GB PC3-14900L 1866Mhz DDR3-240Pin Registered LRDIMM Memory Ram | eBay

Find many great new & used options and get the best deals for Hynix 128GB 4X 32GB PC3-14900L 1866Mhz DDR3-240Pin Registered LRDIMM Memory Ram at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Nope. Those are load reduced. They need to be regular RDIMMs.

 

[MikkelAD]

Nope. Those are load reduced. They need to be regular RDIMMs.

Arhh okay I see. I just randomly stumbled upon them and thought a lot of the specs matched...

 

[Another1]

It does not matter how fast the modules are, the Xeon determines the speed. E5-16XX (4/6/8-Core) can use max. 1066MHz, E5-26XX (12-Core) only max. 800MHz.

 

[MisterAndrew]

It does not matter how fast the modules are, the Xeon determines the speed. E5-16XX (4/6/8-Core) can use max. 1066MHz, E5-26XX (12-Core) only max. 800MHz.

Please reference the source of this information.

 

[MisterAndrew]

I can't find the difference in memory support between the E5-1600 v2 and E5-2600 v2 CPUs, but I did find that quad-rank memory such as the 32GB RDIMMs reduce the speed of the memory to 800 MHz or 1066 MHz since they result in a two DIMM per channel configuration. Here's a document that references that: Thoughts on Intel® Xeon® E5-2600 v2 Product Family Performance Optimisation – component selection guidelines

 

[AidenShaw]

Now more than ever, Emily Litella.​