I know it states in the tech specs and such that it is not supported. There are many Q35 motherboards that will support ECC ram itself WITHOUT treating it as ECC ram. The specs say max ram is 8GB, but there's plenty of posts showing folks with 12GB or 16GB RAM. Specs say that a Core2Quad Q8200 isn't supported, but I have one running in my 755 right now. Saying not supported doesn't state if it wasn't tested so they can't say it will work, or if it was tested and failed.
Anyway, just wanting to see if anyone had tried it.
Okay, I'm not trying to be argumentative in this. I'm just stating that there are users who are stating that they have 12 and 16GB configurations in 755s:
Additionally, according to the posted tech specs, while C2Qs are supported, it doesn't state that the Q8200 is, but it does run. Q35 motherboards depending on BIOS may or may not accept an ECC module and treat it as a non-ECC module, which is what my question was: will it accept an ECC module and treat it as non-ECC? It's not a configuration I've expected Dell to have validated, and the Intel whitepaper on the Q35 chipset is worded ambiguously on the matter.
Will NOT EVER accept ANY ECC module that is REGISTERED OR BUFFERED PERIOD END.
There are no 4GB DDR2 modules that are NON Non Registered. There are 4GB DDR2 Modules that are for Power Edge SERVERS with XEON chipsets that are FULLY BUFFERED.
You reference Q35 chipsets and ECC and 12 to 16 gigs but provide ZERO examples where this is happening.
NON ECC NON BUFFERED RAM Patriot Signature 4GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) PSD24G8002 apparently works. This is not ECC.
You have listed 2 Posts and nowhere do they reference 4GIG modules or brand etc or 12 gigs or 16 gigs.
This is not supported and not happening.
A dell precision 490 for example has 8 slots and will take up to 8 X 4 gig DDR2 Fully Buffered modules for a total of 32 Gigs of ram. This Ram is NOT compatible with the Q35 chipset nor the 755.
Just to let the know-it-all know, 12Gb and 16GB DOES FULLY WORK ON ALL BUT THE USFF. I OWN A DELL OPTIPLEX 755 SFF AND MINI-TOWER AND BOTH ARE FULLY USING 16GB OF RAM. BIOS RECONISES 16GB OF RAM AND THE OS(WINDOWS 10 PROFESSIONAL 64BIT) RECONISES AND USES ALL 16GB'S
Hi, just set myself up a freenas on the 755 SFF. you mention your running 16Gb. could you give me some advice on this, what ram you using? what bios version. also which CPU do you have in there? thanks in advance
speedstep
9 Legend
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47K Posts
0
January 5th, 2015 13:00
ECC, Buffered, and Registered Memory is not supported.
JoeKamel
5 Posts
0
January 5th, 2015 19:00
I know it states in the tech specs and such that it is not supported. There are many Q35 motherboards that will support ECC ram itself WITHOUT treating it as ECC ram. The specs say max ram is 8GB, but there's plenty of posts showing folks with 12GB or 16GB RAM. Specs say that a Core2Quad Q8200 isn't supported, but I have one running in my 755 right now. Saying not supported doesn't state if it wasn't tested so they can't say it will work, or if it was tested and failed.
Anyway, just wanting to see if anyone had tried it.
speedstep
9 Legend
•
47K Posts
0
January 5th, 2015 20:00
12 or 16 gigs is not supported and does not work.
INTEL also says 8GB max AND ECC NO
http://ark.intel.com/products/31918/Intel-82Q35-Graphics-and-Memory-Controller
Dell validated 8GB of DDR2-667 (PC2-5300) and DDR2-800 (PC6400) non-ECC memory. DDR2-1066Mhz PC2-8500/8600 is not supported.
Core 2 Quads Do work in the 755 have for years so I don't know where you are getting your specs from.
http://www.dell.com/downloads/global/products/optix/en/opti_755_techspecs.pdf
JoeKamel
5 Posts
0
January 5th, 2015 22:00
Okay, I'm not trying to be argumentative in this. I'm just stating that there are users who are stating that they have 12 and 16GB configurations in 755s:
en.community.dell.com/.../19503300
en.community.dell.com/.../19296075:550
Additionally, according to the posted tech specs, while C2Qs are supported, it doesn't state that the Q8200 is, but it does run. Q35 motherboards depending on BIOS may or may not accept an ECC module and treat it as a non-ECC module, which is what my question was: will it accept an ECC module and treat it as non-ECC? It's not a configuration I've expected Dell to have validated, and the Intel whitepaper on the Q35 chipset is worded ambiguously on the matter.
speedstep
9 Legend
•
47K Posts
0
January 6th, 2015 05:00
Will NOT EVER accept ANY ECC module that is REGISTERED OR BUFFERED PERIOD END.
There are no 4GB DDR2 modules that are NON Non Registered. There are 4GB DDR2 Modules that are for Power Edge SERVERS with XEON chipsets that are FULLY BUFFERED.
You reference Q35 chipsets and ECC and 12 to 16 gigs but provide ZERO examples where this is happening.
NON ECC NON BUFFERED RAM Patriot Signature 4GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) PSD24G8002 apparently works. This is not ECC.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820220525
You have listed 2 Posts and nowhere do they reference 4GIG modules or brand etc or 12 gigs or 16 gigs.
This is not supported and not happening.
A dell precision 490 for example has 8 slots and will take up to 8 X 4 gig DDR2 Fully Buffered modules for a total of 32 Gigs of ram. This Ram is NOT compatible with the Q35 chipset nor the 755.
ThePhotoGuy
2 Posts
1
November 2nd, 2015 08:00
Just to let the know-it-all know, 12Gb and 16GB DOES FULLY WORK ON ALL BUT THE USFF. I OWN A DELL OPTIPLEX 755 SFF AND MINI-TOWER AND BOTH ARE FULLY USING 16GB OF RAM. BIOS RECONISES 16GB OF RAM AND THE OS(WINDOWS 10 PROFESSIONAL 64BIT) RECONISES AND USES ALL 16GB'S
Blkmoon
1 Message
0
February 15th, 2016 13:00
Hi, just set myself up a freenas on the 755 SFF. you mention your running 16Gb. could you give me some advice on this, what ram you using? what bios version. also which CPU do you have in there? thanks in advance
speedstep
9 Legend
•
47K Posts
1
February 15th, 2016 15:00
You cannot have 16 gig in USFF models or any model with only 2 Ram Slots.
You never get the full amount of ram because the Video Frame Buffer and Bios shadow Steals 512 megs or more that you NEVER get back.
8 Gig Dimms are a no go FOREVER request denied.
4 Gig dimms are priced in the $200 each range making them
totally not worth buying as you could buy a newer system with DDR3 and 16 gigs or more of ram for $800.