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Another C30 Workstation memory puzzle

2020-06-26, 22:10 PM

I have a C30 1136 with 2 x E5 2680 v2.

It has 2 x 32GB and 2 x 4 GB sticks attached in the 1 and 2 slots for each respective processor. All are 1333MHz 10600R capable. I think i've attached the memory info html from Lenovo diagnostics but... it hasn't confirmed attachment and having not done this bit before that leaves me lacking in confidence of success.

BIOS is 68 level.

System is stuck at 1066MHz. Confirmed in BIOS (1066) and in CPU-Z (533 but double for ddr) and also in RAMMon.

I have run it with just the 2 32GB modules and still 1066. I believe all modules are 4Rx4.

Now, I get that running 1866 the ivy bridge processors could only handle a very limited amount of RDIMMS but 1333?

I have looked at the Hardware manual memory tables and, of course, not all permiations are available but ...

I'd welcome better understanding of how the LENOVO imlementation of 602 interacts with the CPU, etc.

If it is what it is then fine but i'd like to get 1333 if possible or sell my existing RAM and buy a more appropriate kit. I don't really need 64+ GB as most of my work to date is CPU or GPU limited.

There seems to be a lack of clarity on detailed Intel  memory compatability in general and not just Lenovo. Does 1333 compatible mean it wlil run but not use?

Many thanks in advance for any constructive thoughts.

If necessary I can perhaps do a BIOS save and attach.

I love the way the forum describes me as paper tape. As recently as 2003 I was using a paper tape puncher to output files for transfer to  a very old but very important radio transmission system that had valves and discreet transistors. AMD and intel arguing over 7nm when this was about 5mm.

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4 Posts

05-12-2020

GB

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Re:Another C30 Workstation memory puzzle

2020-06-26, 22:26 PM

I'm now described as fanfold paper. How dare they. I went directly from wet thermal cancer paper to digital. if you don't know what wet thermal was... kinda difficult to describe. You had to dunk the roll in a bath of water to activate the  thermal/electrostatic qualities and several hundred volts of spark would impregnate the paper. Joy. Your local supermarket are still using this stuff just with a few minor upgrades and no bath.

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4513 Posts

02-22-2010

NC

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Re:Another C30 Workstation memory puzzle

2020-06-30, 12:37 PM

Can you provide more specific details about the 32GB and 4GB DIMMs you're using?  Vendor and vendor PN would be helpful.

 

If you run the system with just the 32GB modules, it sounds like you're still seeing 1066MHz for memory speed.  Does the same happen when only using the 4GB modules?

 

We did qualify 32GB RDIMMs on C30 with parts from Samsung, Hynix, and Micron.  These were all 4Rx4 as far as I know.




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4 Posts

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GB

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Re:Another C30 Workstation memory puzzle

2020-07-05, 1:52 AM

The details taken from Lenovo Diagnostics Memory Info is here. I tried to attach the html file from this in my first entry but it did not work.

I will have a go at running it in 2x4GB mode tomorrow and report back. 

 

 

 

 

Resources:

 

Resource type:

Bank

Index:

0

Manufacturer:

Samsung

Speed:

1066 MHz

Size:

31.999 GB

Part number:

M393B4G70DM0-

Serial:

8953F6F8

Type:

DDR3

  

Resource type:

Bank

Index:

1

Manufacturer:

Hynix Semiconducto

Speed:

1066 MHz

Size:

4.000 GB

Part number:

HMT151R7BFR4C

Serial:

10B1B643

Type:

DDR3

  

Resource type:

Bank

Index:

2

Manufacturer:

Samsung

Speed:

1066 MHz

Size:

31.999 GB

Part number:

M393B4G70DM0-

Serial:

8953F757

Type:

DDR3

  

Resource type:

Bank

Index:

3

Manufacturer:

Hynix Semiconducto

Speed:

1066 MHz

Size:

4.000 GB

Part number:

HMT151R7BFR4C

Serial:

146175BF

Type:

DDR3

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4 Posts

05-12-2020

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Re:Another C30 Workstation memory puzzle

2020-07-08, 20:21 PM

Tried the system with the 2x 4GB Hynix sticks and bios reports 1333MHz, added the 2x  32GB samsung sticks in the respective slot 2s and back to 1066MHZ. So looks like the Samsung sticks are the issue.

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  • Message 6 of 6

Re:Another C30 Workstation memory puzzle

2020-07-08, 23:35 PM

I don't think this will change things based on your previous data points, but our guidance is to typically install the largest capacity DIMMs first in terms of the overall DIMM slot order.  

 

Off the top of my head, I'm not sure why those DIMMs would be reporting at 1066MHz and not 1333MHz.  We actually have a very similar part qualified on the C30 platform from Samsung, with the only difference being M393B4G70BM0 vs. the DIMM  you have which is M393B4G70DM0.  I haven't checked my Samsung memory nomenclature in a while, but I think that letter change would typically indicate a die revision update, which should be rather insignificant.  

 

The only thing that makes sense here is the MRC is clocking the DIMMs down to 1066MHz whenever the 32GB Samsung parts are installed because it is detecting the quad ranked part.  Unfortunately I don't have access to a 30-series platform right now to verify independently due to COVID19.

 

At any rate, the performance difference between DIMMs running at 1333MHz and 1066MHz shouldn't be that significant.  Certain applications might see some performance hit, but in general it shouldn't be that bad.

 

 

 




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