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Izibia
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Optiplex 780 - memory compatibility

Brand manufacturers publish lists of memory modules that are guaranteed with Optiplex 780 MT. Examples:

http://www.kingston.com/en/memory/search/discontinuedmodels/Default.aspx?DeviceType=2&Mfr=DEL&Line=O...

http://www.crucial.com/usa/en/compatible-memory-for/Dell/optiplex-780-mini-tower

How big is a chance a random memory module
- not listed in lists of brand manufacturers (see above)
- within Dell's specifications, i.e. non-ECC, 1066 or 1333, max 4GB per slot)
would work with Optiplex 780?

Is there a way how to increase the chance a new memory would work, e.g. choosing Single Rank / Double Rank, choosing a manufacturer etc.?

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8 Replies
Moderator
Moderator

RE: Optiplex 780 - memory compatibility

I would not rely on them to provide the correct memory. Below are the Dell part numbers for the 4GB memory sticks you can use when searching the internet =
8C7JC, 9V62Y, 60KD4, HKYF9, P382H (1333Mhz)
N852H (1066MHz)

For example, doing a search for "dell part 8C7JC" will yield good results of our OEM memory.

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Izibia
1 Nickel

RE: Optiplex 780 - memory compatibility

Thank you for the hint. The problem is these Dell memory sticks are twice as expensive as standard ones, and I don't count overseas shipping and duty tariffs.


Concerning my original questions - how "much" is Optiplex 780 "incompatible"? How is the chance a random memory stick would work in Optiplex 780?

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Moderator
Moderator

RE: Optiplex 780 - memory compatibility

"How is the chance a random memory stick would work in Optiplex 780?"

There is no way we can know this. We only tested ours.

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Izibia
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RE: Optiplex 780 - memory compatibility

Ok, maybe Optiplex owners will share their experience here.


Chris M, one slightly off-topic question: Are newer Dell desktops more "memory-compatible", or does Dell continue to care about Dell's memory modules only?

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Moderator
Moderator

RE: Optiplex 780 - memory compatibility

Again, we only validate ours. We cannot speak to retail memory.

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Izibia
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RE: Optiplex 780 - memory compatibility

I think I understand.

While motherboard manufacturers create rather large "Memory Qualified Vendors Lists",
your "Memory Qualified Vendors Lists" are always limited to Dell's memory modules.

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Philip_Yip
6 Indium

RE: Optiplex 780 - memory compatibility

I upgraded a lab OptiPlex 780 with an 8 GB (2×4 GB) Crucial RAM kit 2 days ago. I have migrated 3 of these systems in the last week from Windows XP 32 Bit to Windows 7 64 Bit with a complete clean install involving a secure wipe, Windows 7 64 Bit installation, WSUS Offline Update, drivers installed in the correct order and finally new factory settings with Dell Backup and Recovery. I will likely tackle a 4th system next week. Probably I will get another 3 more 8 GB RAM kits for the other 3 systems.

Crucial guarantee that their RAM is compatible if you use their system scanner or select your model.

Dr Philip Yip
Tech Enthusiast and Author of the Unofficial Dell Windows Reinstallation Guide

Windows FAQs and OEM Downloads


#IDoNotWorkFor Dell
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RE: Optiplex 780 - memory compatibility

This kit works perfectly, I took my chances when reviewers stated that it would run in the Optiplex 780, purchased two kits for 16GB total.

www.amazon.com/.../B00683X4PQ;redirect=true&ref_=od_aui_detailpages00

Speccy specs to show it:

speccy.piriform.com/.../Mq8NWTqu2ALP6qpoWypKqIW

Though have no idea of why it's running at 532MHz, rather than 800, which is the norm for 1600MHz kits. Maybe the RAM is that way to be compatible with more computers, it's likely a chipset limitation. 

What boils my blood the most though, is that the upgrade didn't raise my WEI RAM score at all, still at 7.3. While I didn't expect 7.9, did expect somewhere in the range of 7.5, after all, this is 16GB RAM we're discussing. 

Cat

Proud Dell owner since 2003, beginning with the Dell Latitude C640.
System Specs, as provided by Speccy (05/22/2018) Delidded i7-4790K!

http://speccy.piriform.com/results/2C1bee3t40vxgFn8Fo8Uj35

XPS 8700 specs (current), added 92mm front intake in well concealed stock area, no case mod needed, only two screws & PWM splitter (exhaust tied to CPU fan speed), intake uses stock exhaust header & fan. All fans controlled by SpeedFan, otherwise would be locked at just over 800 rpm, now all runs over 2000 rpm.

http://speccy.piriform.com/results/KrNXc5IZ6HmJvrrLVSZbGzi