Hello

1. Under this configration what is the operating speed of the memory?

1067Mhz

2. What is the maximum amount of memory that can be installed and still operate at 1333MHz?

48GB with 8GB DIMMs populated in slots 1,2,3

I think that the maximum configurable amount of memory operating at 1333MHz would be 96GB with (6) 16GB RDIMMS occupying the following slots: A1, A4, A7, B1, B4, B7

All 16GB DIMMs that are validated for this system are quad rank. Populating 2 quad rank DIMMs in a bank together will run at a maximum of 800Mhz. 8GB DIMMs are the largest dual rank DIMMs that are validated.

Thanks

Thanks for your wuick reply.  Wouldn't the memory operate at 1067 MHz in the 'better configuration' you have reccommended?  I figure that based on my reading of the following from pg. 99 of the hardware owner's manual:

 

The memory speed of each channel depends on the memory configuration:

– For single or dual-rank memory modules:

• One memory module per channel supports up to 1333 MHz.

• Two memory modules per channel supports up to 1067 MHz.

• Three memory modules per channel supports up to 800 MHz,

regardless of memory module speed.

I completely rewrote my first post because of all of the errors. I was in a rush to respond and did not fully read the population rules. We had a BIOS update for the R710 to allow 1333MHz with 2 DIMMs per channel. I thought we applied the same update to the T710, but I am unable to find mention of it anywhere. It appears the tower version does not have this capability.

Thanks

System:         Dell PowerEdge R710
Version:        1.1.4
Release Date:   05/15/2009

* Added Hardware Prefetch to the Processor Settings menu of System Setup.
* Corrected a rare issue, wherein system errors do not get logged.
* Corrected few issues while booting to Windows 2008 in UEFI mode
* Enhanced performance in non-fully-multithreaded workloads with Advanced 
  Power Control enabled.
* Changed to properly preserve ESI in E820
* Updated MRC to improve performance
* Added 9600 bps baud rate support for console redirection
* Added support for 2 Memory DIMMs Per channel when Memory Bus speed is 
  at 1333MHz
* Added support for 16GB Memory DIMMs
* Fixed issue where Coherent Serial over LAN with iDRAC6 was unreliable 
  during POST, sometimes displaying unknown characters.
* Fixed issue where some PCIe Gen1 cards failed to train properly.
* Fixed issue where certain benckmarks were resulting in lower performance in 

The memory speed of each channel depends on the memory configuration: – For single or dual-rank memory modules: • One memory module per channel supports up to 1333 MHz. • Two memory modules per channel supports up to 1067 MHz. • Three memory modules per channel supports up to 800 MHz,

You are correct, sorry about that. The maximum speed achievable with any quad rank DIMM is 1066, so you are limited to 8GB dual rank DIMMs as a maximum size to achieve 1333MHz. Single DIMMs per channel in slots 1,2,3 on each side for a max population of 48GB.

Are you sure only qr 16gb dimms are supported? It appears dr 16gb dimms are also available. We purchased 12 of them planning to put this configuration in a couple of our T710s: 16 8 4, 16 8 4, 16 8 4 (we currently are running 8 8 4, 8 8 4, 8 8 4) Obviously speed will be limited to 800mhz in this config, but the dual rank dimms should be fine, right?

Are you sure only qr 16gb dimms are supported?

I won't say it is impossible, but I double checked the part database for the T710. There are two validated 16GB DIMMs and they are both quad rank. It is rare but sometimes validated components are not tied to all validated equipment. At this point I don't show any dual rank 16GB DIMMs validated for this server.

We purchased 12 of them planning to put this configuration in a couple of our T710s: 16 8 4, 16 8 4, 16 8 4 (we currently are running 8 8 4, 8 8 4, 8 8 4) Obviously speed will be limited to 800mhz in this config, but the dual rank dimms should be fine, right?

That configuration will be fine if all of the DIMMs are dual rank or lower. If a quad rank DIMM is populated then you can only populate two DIMMs per channel.

Thanks

Interesting; these were pulls from an existing server. I will report back as soon as we have a chance to try them in our T710!