Mixing ECC and NECC (Non-ECC) RAM Modules

Hi,
I have a G5 Dual Core 2.0 with a pair of 512Mb Non-ECC (NECC) RAM installed and I want to upgrade to 3Gb. I'm thinking of getting 2Gb ECC modules and discarding the 1Mb NECC installed. But I came across a phrase in the Apple Manual of my G5 that states "DO NOT MIX ECC and NON-ECC Memory Modules WITHIN A PAIR." Does that mean I can mix ECC and NECC within Memory Banks and NOT within a PAIR? Because in that case I won't have to discard my NECC 1Gb and have a mixed 3Gb Memory!? I'm afraid to actually try it so I would appreciate your insights. Thanks much.
G5 Dual Core 2.0 Mac OS X (10.4.7)

Yes. You can mix ECC and nonECC as long as you don't pair the ECC with the nonECC. The computer will just treat all RAM as nonECC.
You can keep the original memory as long as the two 512MB DIMMs are always paired with each other.

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System PRofiler and ECC RAM

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Does the System Profiler indicate when RAM is ECC memory? Does it indicate when it's not?
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The Apple documentation recommends against mixing ECC and Non-ECC memory, but the System Profiler doesn't seem to indicate the difference.
Thanks.

Yes it does indicate either. Until recently, I was running mixed, now I got ECC only, below is how it is shown. How non-ECC RAM shows you already know I believe.
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Early 2008 Mac Pro ecc ram question...

Pretty simple really - can i use non ecc ram in a 2008 2 x 2.8 quad mac pro?
If so what are the advantages/disadvantages in doing so?
Obviously ECC ram is more expensive & harder to find it seems...
thanks in advance

For you, there is no such thing as FBDIMM that is not also ECC.
It is cheap actually,
How To Install and Remove Memory Mac Pro
https://support.apple.com/kb/HT4433
2x2GB FBDIMM DDR2 667MHz @ $36
http://www.amazon.com/BUFFERED-PC2-5300-FB-DIMM-APPLE-Memory/dp/B002ORUUAC/
8 DIMMs offers best performance bandwidth and 17% boost while the above is 4% slower (667 vs 800MHz) you won't see or feel or notice the difference and off set by 13% using all DIMM slols.

Mixing RAM Modules

Several weeks ago, I replaced my 256 MB RAMs with 2 1 GB modules in a late 2005 G5. They seemed to work fine, though my GPU seemed to be running a bit hotter. I just installed an additional 2 GB bought from OWC, and also added back the 2 original 256 MBs to bring my total to 4.5.
Looking in System Profiler, I see that my original 256s and the latest 1 GB modules are PC2-4200U-444, as specified in the online compatibility guide. I see the I GB modules from my first upgrade are PC2-3200U-288.
I bought them at a local shop- for way too much money, by the way - and was told that the number printed on them was wrong and they were compatible with my model. Is that right, or this a problem?
Thanks

Hi! The PC2-4200 modules are the correct ones and you shouldn't run anything slower. You can run faster ones but you shouldn't run slower ones or mix speeds. And if the computer sees them as the slower ones then most likely they are! Tom
Message was edited by: Thomas Bryant

Mixing RAM Modules (1gig + 2gig = 3gig)

Hello,
I am about to buy a Mac Mini and I am on a tight budget. The one thing I want to do for sure is upgrade the memory, but I'm in a quandary of sorts given my budget. The retailer where I want to buy the Mini from only sells the appropriate RAM for the Mini in 2gig modules. So here's my question: I know it is possible to mix the stock 1gig stick with a 2gig stick to get 3 gig of RAM total, but will it be worth it to me? I realize that the best configuration would be to slap in 2 2gig modules in and just be done with it, but with 3gig, would I be appreciatively shooting myself in the foot and killing the machine's performance, or wouldn't I notice? I need to have the memory installed at purchase because I am physically handicapped and adding the memory myself is out of the question. And after researching how to replace memory on the Mini, I wouldn't have the courage to ask anybody I know to attempt to do it after buying it. Is mixing RAM modules a good idea?
Thanks in advance.
Malcolm

Nope, I am not confused, There does have generation between Mac mini model. Maybe not official, but we all know. Check About This Mac ---> More Info ---> Model Identifier : Macmini2,1 (That means, 2nd generation)
Macmini 3,x (means 3rd generation I supposed)
And the 3rd generation doesn't support Dual Channel, referred to Crucial.com
http://www.crucial.com/store/listparts.aspx?model=Mac%20mini%20%28Intel%20Core%2 02%20Duo%202.0GHz%20DDR3%29%20MB463LL/A&pl=Apple&cat=RAM

Mixing RAM modules on a 800Mhz machine

I have a new Mac Pro. 800Mhz. I want to install more memory but n find any 800Mhz 2Gb modules for sale as yet.
I have the option of installing 667mhz modules.
Will this cause a problem mixing 800Mhz and 667Mhz modules?

You posted your question in the wrong forum. This forum is for pre-G3 Macs. You should repost in the Power Mac G5 forums @ http://discussions.apple.com/category.jspa?categoryID=108
That said, this will probably answr your question.
You can't use a processor speed lower (667Mhz) than that specified (800Mhz). Plus there are other restrictions. See *How do you upgrade the RAM in the Mac Pro? How much RAM of what type does it support?*
@ http://www.everymac.com/systems/apple/mac_pro/faq/mac-pro-how-to-upgrade-memory- what-type-ram.html
You can buy the 800Mhz RAM at Other World Computing @ http://eshop.macsales.com/Search/Search.cfm?Ne=5000&Ntt=MacPro+800MHz+MatchedPair&Ntk=Primary&Ns=P_Popularity%7C1&N=7318
 Cheers, Tom

I need to know if ECC ram in a HPZ1 is compatible with Quadro 500M, 1000M, 2000M video cards

hello,
i purchased a refurbished hpz1 a year ago, equipped with a Quadro 500M and 16 GB of ECC ram. The cpu is a Xeon e3 1245 v2.
I have lots of trouble trying to use this workstation with certain graphics programs, like Sketchup 2013 and 2014, as well as rendering programs. Anything from program freezing/shutting down shortly after opening to locking up the machine midstream. Yes, I have updated video drivers, several times, but still plagued with the same problem. Not all the time, but frequently.
In shopping for upgrades to the 500M card (like 3000M, perhaps) I have come across video card vendors that specifically mention these older Quadro cards are NOT compatible with ECC ram. I have brought this to the attention of the workstation vendor, IT Creations, in California, and they claim to never hearing of this issue.
I have spent dozens of futile hours over the past year dealing with system instability, issues like bootup screens informing me the ram system chip count has (erroneously) changed, requiring immediate shutdown and booting back up to override the message.
Is it true? CAN or SHOULD ECC ram be used with earlier Quadro cards using MXM3.0?

Hi:
You may also want to post your question on the HP Business Support Forum -- z Workstations section.
http://h30499.www3.hp.com/t5/Workstations-z-series-xw-series/bd-p/bsc-272#.U5cLUOlOW9I

Create BW datasource on standard ECC function module MCEX02_02_SCL_GR

Hello Experts,
I plan to use standard ECC function module MCEX02_02_SCL_GR to get the GR dates for the PO Schedule Lines. I copied this function module with the BW function group and tried to create a datasource in RSO2. However I receive the following error
ZMM_PO_GR: TABLES-paramter E_T_DATA for extractor MCEX02_02_SCL_GR is missing
I understand that the template for BW function modules is RSAX_BIW_GET_DATA_SIMPLE. However is there any way I can use the standard ECC function module OR else how would I incorporate the code in MCEX02_02_SCL_GR into the RSAX_BIW_GET_DATA_SIMPLE template.
Thanks for your help.
Alnick

create a DS based on FM and call MCEX02_02_SCL_GR into that FM using call funcation XXX destination.
or
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My team is developing our first Crystal Report directly against ECC data and are experiencing the following problem:
Our ABAP team created a custom RFC to provide the needed data, but we are unable to see a full list of available Functions and list of available tables from SAP ECC data source.
We worked with Security and temporarily ran under SAP_ALL authority but were still unable to see/ access the function module. We have the integration kit installed and can see some function modules from within Crystal, just not the ones we need. Is there some trick to creating a function module so that it is visible to Crystal?
Environment Details:
Crystal reports Version- 12.2.3.467
SAP GUI # 7200.1.2.1051
CRDB_OpenSQL.Dll # 12.2.3.467

Hi Ingo. I enjoyed your BO 4 seminar and meeting you at ASUG/Sapphire. I was hoping you'd pick this up.
The connection options shows the info below. It doesn't seem to be telling us how to filter to either select or exclude SAP ECC function modules. It has options to? Are these options correct to see ECC function modules and should we be seeing other options?
Database tab (only tab in dialog)
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- Sort tables or fields alphabetically (sort tables selected)
- Select tables, views, system tables, synonyms, and stored procedures (all except synonyms selected)
- Table like and owner like (both blank)
Advanced Options (x = selected)
- (X) Use indexes on server
- ( ) perform grouping on server
- (X) Database Server is case sensistive
- (X) Select Distinct for Browsing
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- (X) Verify on first refresh
- ( ) Verify stored procedures on first refresh
- (X) verify when database driver upgraded
- (X) Automatic smart linking

Whats the difference between 2x4GB RAM modules and 4x2GB Ram modules?

I need 8GB of RAM. If I get 4x2GB modules it is a lot cheaper. Is there any difference in performance if I have 4x2GB Ram modules instead of 2x4GB RAM modules? They both provide 8GB? Am I missing something here?

From MacSales.com:
Four or More FB-DIMMs installed provides for best performance. FB DIMM technology takes advantage of multiple channel access. Apple recommends the use of 4 or more modules to take advantage of this 256-Bit Wide memory architecture. Modules must be installed in pairs, each module is 64 Bits Wide + 8 Bits for Error Correction (ECC).
Message was edited by: Russian Passion
Message was edited by: Russian Passion

What are the practical advantages of ECC RAM?

I have a 2009 8 core Mac Pro and a 2010 dual core iMac (one I use in the office, the other at home, but both get used for work). I'm thinking about replacing the iMac and I'm inclined to get another iMac, but one thing makes me wonder if I should get a Mac Pro -- the fact that the Mac Pro has ECC RAM.
But I don't really know how big of a difference ECC RAM makes. In general, both my Mac Pro and iMac seem stable -- I can keep them up and running for weeks at a time. Generally, the only reason I need to restart is to update the OS. I have occasionally had crashes on both, but those crashes are too rare for me to perceive a difference in frequency.
One difference I've noticed is that remote controlling the Mac Pro is more reliable than remote controlling the iMac (using Back to My Mac). But I don't know if this could be due to the ECC RAM in the Pro or to some other unknown factor.
So -- does anyone have any evidence regarding the practical benefits of ECC RAM in a Mac Pro? I have found articles about the benefits of ECC RAM in servers, but that is such a radically different usage scenario that I can't really figure out how it applies to my situaiton.

When the RAM is working perfectly, there is NO Advantage to using ECC RAM, and ECC RAM may be effectively a little slower than conventional RAM.
The advantage comes when you have problems of almost any sort, especially if you have a lot of RAM installed.
In a Mac with conventional RAM, if you have a complex problem, you may spend a lot of time wondering if your problems are caused by Memory Errors. Memory errors can be very difficult to "catch in the act" of failing, and running memory tests overnight and/or for several days and nights may be required to isolate the problem. The more RAM you have, the longer this testing may take, and may still be inconclusive. Festering Memory errors can cause your files to become corrupted over time.
Error Correcting Code (ECC) is a system supported by Hardware in the Xeon Processor. It generates eight additional syndrome bits -- additional parity bits formed from parity permutations on the data bits in a word -- and stores them with each word in memory. When read back, Hardware checks these parity trees in memory-cycle times, and any single-bit errors are corrected on the fly -- no slowdown. The correction also sets an error bit that is later collected by background software and tabulated in a report.
Double-bit errors are generally not correctable. By design, they halt the machine on a kernel panic, machine check, to avoid poisoning your data. So a Server with error correction will not garbage-up its data by propagating RAM memory errors into its data.
I have to agree with Linc Davis in that this is an Industrial Strength solution to a problem many users may never face. Personally, I use it on some of my systems (especially my home Server). I am glad it has been made available, and I am willing to pay the substantial premium for it (for certain uses).

How to find the number of Ram modules in M4000 and M3000

Dears,
Hope you all are in best of your health, I would like to know the command to check the number of RAM modules in M4000 or M3000 Sun Sparc Servers. I think it should be via XSCF Console if am correct? I trigger following command *"showhardconf"* got below output.
======================================================================================================
XSCF> showhardconf
SPARC Enterprise M4000;
+ Serial:BCF094403J; Operator_Panel_Switch:Locked;
+ Power_Supply_System:Single; SCF-ID:XSCF#0;
+ System_Power:On; System_Phase:Cabinet Power On;
Domain#0 Domain_Status:Running;
MBU_A Status:Normal; Ver:0101h; Serial:BC0943029D ;
+ FRU-Part-Number:CF00541-0893 06 /541-0893-06 ;
+ Memory_Size:16 GB;
CPUM#0-CHIP#0 Status:Normal; Ver:0401h; Serial:PP093500VY ;
+ FRU-Part-Number:CA06761-D202 E0 /375-3568-05 ;
+ Freq:2.400 GHz; Type:32;
+ Core:4; Strand:2;
CPUM#0-CHIP#1 Status:Normal; Ver:0401h; Serial:PP093500VY ;
+ FRU-Part-Number:CA06761-D202 E0 /375-3568-05 ;
+ Freq:2.400 GHz; Type:32;
+ Core:4; Strand:2;
MEMB#0 Status:Normal; Ver:0101h; Serial:BF0939DFFA ;
+ FRU-Part-Number:CF00541-0545 08 /541-0545-08 ;
MEM#0A Status:Normal;
+ Code:ce0000000000000001M3 93T5660QZA-CE6 4151-478d0372;
+ Type:2A; Size:2 GB;
MEM#1A Status:Normal;
+ Code:ce0000000000000001M3 93T5660QZA-CE6 4151-478d0306;
+ Type:2A; Size:2 GB;
MEM#2A Status:Normal;
+ Code:ce0000000000000001M3 93T5660QZA-CE6 4151-438845e9;
+ Type:2A; Size:2 GB;
MEM#3A Status:Normal;
+ Code:ce0000000000000001M3 93T5660QZA-CE6 4151-478d02e9;
+ Type:2A; Size:2 GB;
MEMB#1 Status:Normal; Ver:0101h; Serial:BF0939DKJ6 ;
+ FRU-Part-Number:CF00541-0545 08 /541-0545-08 ;
MEM#0A Status:Normal;
+ Code:ce0000000000000001M3 93T5660QZA-CE6 4151-478d0374;
+ Type:2A; Size:2 GB;
MEM#1A Status:Normal;
+ Code:ce0000000000000001M3 93T5660QZA-CE6 4151-478d037b;
+ Type:2A; Size:2 GB;
MEM#2A Status:Normal;
+ Code:ce0000000000000001M3 93T5660QZA-CE6 4151-478d02f9;
+ Type:2A; Size:2 GB;
MEM#3A Status:Normal;
+ Code:ce0000000000000001M3 93T5660QZA-CE6 4151-478d0373;
+ Type:2A; Size:2 GB;
DDC_A#0 Status:Normal;
DDC_A#1 Status:Normal;
DDC_B#0 Status:Normal;
IOU#0 Status:Normal; Ver:0101h; Serial:BF0938DA6R ;
+ FRU-Part-Number:CF00541-2240 05 /541-2240-05 ;
DDC_A#0 Status:Normal;
DDCR Status:Normal;
DDC_B#0 Status:Normal;
PCI#1 Name_Property:SUNW,qlc; Card_Type:Other;
PCI#2 Name_Property:SUNW,qlc; Card_Type:Other;
PCI#3 Name_Property:network; Card_Type:Other;
XSCFU Status:Normal,Active; Ver:0101h; Serial:BF0939DTNJ ;
+ FRU-Part-Number:CF00541-0481 04 /541-0481-04 ;
OPNL Status:Normal; Ver:0101h; Serial:BF0940EAEM ;
+ FRU-Part-Number:CF00541-0850 06 /541-0850-06 ;
PSU#0 Status:Normal; Serial:1357FYG-0911AD02JY;
+ FRU-Part-Number:CF00300-2011 0202 /300-2011-02-02;
+ Power_Status:On; AC:200 V;
PSU#1 Status:Normal; Serial:1357FYG-0911AD02K8;
+ FRU-Part-Number:CF00300-2011 0202 /300-2011-02-02;
+ Power_Status:On; AC:200 V;
FAN_A#0 Status:Normal;
FAN_A#1 Status:Normal;
FANBP_B Status:Normal; Ver:0401h; Serial:BF0940E134 ;
+ FRU-Part-Number:CF00541-3098 01 /541-3098-01 ;
FAN_B#0 Status:Normal;
FAN_B#1 Status:Normal;
==============================================================================================
With the above output I understand that we have the following:-
-> *16GB RAM*
-> We have memory boards **MEMB#0** and **MEMB#1**
-> We have 4 modules on **MEMB#0** and they are following:-
MEM#0A -2GB - if we Upggrade to 4GB what will happen to the existing 2GB RAM?
MEM#1A -2GB- if we Upggrade to 4GB what will happen to the existing 2GB RAM?
MEM#2A -2GB- if we Upggrade to 4GB what will happen to the existing 2GB RAM?
MEM#3A -2GB- if we Upggrade to 4GB what will happen to the existing 2GB RAM?
-> We have 4 modules on **MEMB#1** and they are following:-
MEM#0A -2GB- if we Upggrade to 4GB what will happen to the existing 2GB RAM?
MEM#1A -2GB- if we Upggrade to 4GB what will happen to the existing 2GB RAM?
MEM#2A -2GB - if we Upggrade to 4GB what will happen to the existing 2GB RAM?
MEM#3A -2GB- if we Upggrade to 4GB what will happen to the existing 2GB RAM?
So, I understand that the above server will have 32 GB Ram as our company ordered recently, Correct?
In the specifications of M4000 i see that for these servers we can upgrade he Ram upto 128 GB.
Please guide, any help offerred is appreciated.
Edited by: user9007339 on 26/01/2013 03:14 ص

A Key document is:
http://docs.oracle.com/cd/E19855-01/819-2210-14/819-2210-14.pdf
The m4000 can have 4 memory modules.
Each memory module can contain up to 8 dimms. (Two groups on same size (A and B) of 4 dimms). Group A dimms may must not be smaller than Group B dimms. (within a memory module).
The server can contain 4 memory modules of 8 dimms ... 128GB is attained by 32 4GB dimms. ( 8GB dimms used to be purchasable but are now discontinued ).
Depending on what you purchased to achieve 32GB on your server then following options are available:
- If you purchased 2 memory modules of 8GB each simply put these in two unused module slots and goto 32GB
- If you purchased 2 memory modules of 16GB each simply put these in two unused module slots and goto 48GB
- If you purchased 4 memory modules of 8GB each using 8 x 1GB dimms then move your existing simms into the group A slots of the new memory modules, goto 40GB and sell the spare dimmms on ebay or put them certain DELL's (then watch the thing crash due to a static dimm destruction issue and possilbe issues as it isn't supported.)
- If you purchased 8 2GB dimms stick them in your existing memory modules
- If you purchased 16 2GB Dimms ... and don have spare empty memory modules sell spares on ebay.
.... There may be further options ....
In general the person you are purchasing from should be giving good advice ... better than mine above.
... My cynical opinion is a lot of partners (and perhaps even Oracle itself) supplying the purchase may be on commission and have no interest and little care in minimising your cost .... having seen the performance of some oracle 'partners' in the uk I can see why some customers might want to move away from oracle hardware.
Please be aware certain games with switching things about could affect your warrantee ... ( its highly embarrassing when a failing disk in a dilbert has the wrong part number or even worse an incorrect backplate affecting the airflow ... ) ... and what you are really paying for is for an engineer to come and sort your server out if there is a hardware issue. So take some of the suggestions above with a pinch of salt.
Please be aware while have I tried to be accurate above I may have made a mistake. ... .... (in fact knowing me I probably have).
Edited by: bigdelboy on 26-Jan-2013 03:51 (NB: adding memory to servers is often a difficult balancing act and may not be cost effective .... and may make smaller dimms redundant in an upgrade in order to maintain supportable/workable configurations). A new T4/T5 may be more cost effective}. Buying fully populated at the beginning is also often more cost effective .... though the largest dimms to achieve highest capacity may be cost prohibitive.

Is it possible to mix italic and non-italic fonts in an axis label?

Is it possible to mix italic and non-italic fonts in an axis label in diadem reports?

No, there is no chance to do this.
You can only use the "Textobjekt" to mix italic and non-italic fonts.
Thanks
Klaus D

I have had a new ram module fitted and now i have no photos in I photo but they are there on the hard drive how do I get them into i photo as they were.

I have a 2008 Macbook and have had a new ram module fitted and now i have no photos in I photo but they are there on the hard drive on mackintosh ,photos how do I get them into i photo as they were.
Frustrated
Thanks Andrew

changing the ram has nothing to do with the photos missing. Did you install the ram or someone else?

Mixing ECC and NECC (Non-ECC) RAM Modules

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