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Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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I have an E6420, i7-2760 2.4Mhz,8MB, OS-W7- 64bit.......used for business when traveling to examine and mark up ACAD drawings usually viewed in the office on a Precision Work Station with 32GB and a big screen.  My question to anyone who knows is this. Dell technical support has told me on more than one occasion that this machine supports a maximum of 8GB period. That it is a waste of time to upgrade to 16GB because the system won't support it. I really don't want to experiment if its true. More often than not initial technical responses I've received over the years from DELL have been wrong so it pays to be persistant until convinced.

I'd like to put 2-8GB chips in it betting that additional RAM will speed up screen regenerations given the video processor is what it is. Anyway, if anyone knows if what Dell is telling me is fact please chime in? If anybody knows for sure this laptop and OS is incapable of addressing 16GB please let me know? 

If it will accept them I'd like an informed opinion about which speed would be preferred, 1333 or 1666. I understand faster is usually better but if there Is there a latency issue perhaps one is a better fit for this machine. If this is a total waste of time and money, I'd like to know that too.

Any constructive advice, opinion or comment will be appreciated. 

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Crucial is usually a good indicator - they say 8G max.

www.crucial.com/.../listparts.aspx

That doesn't mean 16 won't work - just that they won't guarantee it.

Using RAM over 1333 MHz is pointless.  It won't run any faster.

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2 Bronze

Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Just to confirm another combo that works:

E6420, BIOS A17

Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz

16342 MBytes

PC3-12800J (800 MHz)

Corsair CMSX8GX3M1A1600C10

BIOS sees them running at 1600Mhz, which was a surprise.  memtest ran successfully, and so far it's working very well.

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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OS Name Microsoft Windows 10 Pro

Version 10.0.15063 Build 15063

System Manufacturer Dell Inc.

System Model Latitude E6420

System Type x64-based PC

Processor Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz,

2801 Mhz, 2 Core(s), 4 Logical Processor(s)

BIOS Version/Date Dell Inc. A24, 5/12/2017

SMBIOS Version 2.6

Hardware Abstraction Layer Version = "10.0.15063.0"

Installed Physical Memory (RAM) 16.0 GB

Total Physical Memory 15.9 GB

Available Physical Memory 13.1 GB

Total Virtual Memory 31.9 GB

Available Virtual Memory 29.1 GB

Page File Space 16.0 GB

Notes:

1. Windows 10 Pro Release 1607 (Version 14393) just upgraded to Windows 10 Pro Release 1703 (Version 15063) known as the Windows 10 Creators Update deployed by Microsoft to me in June 2017.

2. Removed Memory: Samsung DDR3, 2x4GB, 1333MHz, 1.5V, Model: M471B5273CH0-CH9

3. Added Memory: Corsair DDR3, 2x8GB, 1600MHz, 1.5V, Model: CMSX16GX3M2A1600C10

4. You must buy 1.5V memory for 2 and 3 generation Intel processors.

5. Corsair memory speed is backward compatible to 1333MHz to match the external bus speed.

Memory Comparison: Task Manager | Performance | Memory

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10 Diamond

Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Crucial is usually a good indicator - they say 8G max.

www.crucial.com/.../listparts.aspx

That doesn't mean 16 won't work - just that they won't guarantee it.

Using RAM over 1333 MHz is pointless.  It won't run any faster.

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2 Bronze

Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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ejn63, your response is logical and I have purchased memory for pc's and printers from Crucial many times successfully in the past and I agree that their information is usually reliable. I'm wondering however, is yours and their information based on what DELL says it 'supports' versus what the hardware and OS can handle since probably few people buying these machines opt for 16GBs.  "DELL" says it doesn't support that level of memory chip in this laptop.......OR....will the fully configured laptop with a quad processor and 64 bit OS handle and address the 16GB chips? As I said, I don't want to lay out the money then find out the answer is NO. But, if it will theoritically handle (and use) that memory, I'd spring for the hundred bucks betting on the likelyhood it would help the video function. Windows Professional 7/64bit theoritically can address 192GB of RAM memory according to the link you attached? That makes me wonder why DELL "says" it doesn't support it. Could it be they would rather you buy their M series for business use at that level than the less expensive E6420 series? BTW I have two M4600's with 32GB and duel SSD, discreet nVidia processors that do a great job running that software.......I just don't want to haul either of them around when traveling since athough they are laptops they weight a ton. From office to home one story; office to Tel Aviv is another. The E6420 is the lowest thing on DELL's totem pole configured the way I described that comes close to being useful for panning around and marking up ACAD files on the road. Thanks for your response by the way. It does backkup DELL's contention.

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Hey jbreiner, did you think of going into one of small computer hardware stores and "renting" memory for fast on-site installation? You ask store owner for trying RAM modules and in turn you insure them that if your laptop will be able to address that much RAM or if anything goes wrong, you will pay for memory. This could be a win/win with the downside of dedicating more of your time to do on-site laptop test which is roughly 1 hour. Best is to ask from friends who have spare modules lying around or have no problem to lend you.

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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In my case with HP Pavilion laptop however, I read that there were some people who successfully installed more RAM than officially claimed this model of laptop was capable of supporting so I first bet my money on that it would work and luckily my laptop accepted and worked solidly thereafter but personally I don't recommend betting on it unless you are confident it will work.

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2 Bronze

Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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So I just tried this - upgrading my E6420 to 16GB of RAM.

It's recognized by the system - but my memory fails the built-in RAM test (in the bios). Interestingly the memory is ok for both the Windows 7 memory test (test memory from the OS and then reboot and run through the tests) and MemTest86 which is running through it's second pass of all tests at the moment.

I may have bad chips ... but others have said that they are using 16GB with success on their E6420.

I'll be keeping the chips and will update this forum if things go awry and I have to return them.

Best,
bhath11

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Thanks. Keep us posted!

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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The second pass with MemTest86 revealed a ton of errors. So I opened an RMA with Amazon.co.uk and will be sending the memory modules back.

The memory I used was this: http://www.amazon.co.uk/Komputerbay-PC3-10600-1333MHz-204-Pin-9-9-9-24/dp/B00698WP50 

I'm going to try again either with the same (hoping they don't send me the same chips back again) or another brand.

Unsure what the 9-9-9-24 is about in the product description. Any clues? I'd hate for this to have been buyer error.

Best,
bhath11 

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Thanks for heads-up. There are some unfavorable reviews on Amazon.com about Komputerbay memory. In your case I would choose popular brand to acertain proper operation of your laptop and better compatibility.

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Bought the Crucial memory from amazon UK: www.amazon.co.uk/.../ref=cm_cr_mts_prod_img

It works perfectly. Overnight run of MemTest86 revealed no errors. Much better than the Komputerbay memory I tried before. Full refund from amazon for the first purchase including return shipping.

So: yes, it is possible to upgrade a Dell E6420 to 16 GB of RAM - even though Dell say it's not supported.

I paid 60 GBP for the Crucial memory modules.

Best,

bhath11

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Excellent bhath11 Thanks for not forgetting us here. But because E6420s have varying configurations, I would like to know what processor and motherboard you have in your laptop's configuration.

I have i5-2520 dial-core processor and Intel QM67 Express Chipset Family motherboard.

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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My computer has the following:

Intel(R) Core(TM) i5-2540M CPU @ 2.60 GHz + QM67 Express Chipset.

A week after installing, everything is stable with 16 GB of memory - and I'm able to allocate sufficent memory to the VMWare machine that I need to run occasionally.

Best regards,

bhath11

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Cool, I have already pointed people in this forum to this thread who also wonder if it possible to install over 8GB of RAM in their laptops.

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Personal experience only - does not constitute an endorsement of putting 16GB in your laptop - your results may vary - not my responsibility if things go horribly wrong. Other legal disclaimers.

best,

bhath11

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Agree, configurations may vary and who knows, maybe it also depends on when components were manufactured so this can also be a gamble unless you ensure. The best way to ensure would be to take your friend's memory and see if your laptop works with it or ask to test in a computer repair center.

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Re: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Just to confirm another combo that works:

E6420, BIOS A17

Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz

16342 MBytes

PC3-12800J (800 MHz)

Corsair CMSX8GX3M1A1600C10

BIOS sees them running at 1600Mhz, which was a surprise.  memtest ran successfully, and so far it's working very well.

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Hi guys,

Just to confirm that I've also upgraded my E6420 (i5-2520M CPU @2.5GHz ) with two banks of 8GB each of Samsung DDR3 1600MHz RAM (PC3-12800) and they passed all tests and seems to be working fine at full speed (1600MHz).

Thanks to all of you, these posts made me take the risk to upgrade my laptop memory! 🙂

Cheers!

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Isn't that only dependent on the CPU?  I mean the Intel 2820QM supports DDR3 1600.  Is there a limitation because of the mobo, that allows no mare than 1333?

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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confirmed working with the Corsair Vengeance 1600 MHz 8GB modules on an E6420 Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz. BIOS reports 1333MHz.

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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I ordered the same Corsair 8GB modules and it recognizes them just fine! 😄

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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I own a Dell E6420 w/ i5 2520m and it ONLY sees 8 GB (with 2x8 GB cards) @ 1333MHz of the 16 GB on 2 cards that I installed,  I would really like to have the 16 but this mobo does NOT support 16 GB RAM!  You need to specify what mobo and BIOS not just the model of laptop you have lol.  This is whats in mine: Mobo: Dell model: 0K0DNP v: A01 Bios: Dell v: A21.  Would be nice to know if yours differs, do you know how to find this information on your laptop?  This Mobo can handle up to the i7 2820QM which will allow the Crucial RAM I bought to run @ 1600MHz but still the mobo limits the total amount of RAM to 8 GB.  I would really appreciate knowing more of your hardware so that I might improve this laptop, if I can and $ permits.  Though OS would not matter, Win 7 & Linux also only see 8 of the 16.  BIOS of course sees 8 GB @ 1333MHz.

Thanks.

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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You are an idiot!  He asked what CPU, Mobo, and BIOS...You answered with CPU, & QM67 Express Chipset!  I have these as well and I installed 2 x 8GB cards that COULD go 1600MHz IF IF IF the CPU can do that.  As we all know, I hope, the 2540m does not support 1600MHz so the RAM would be limited to 1333MHz.  I was fine with that in the interim, that is until I bought a 2820QM CPU which DOES support 1600MHz.  What this computer sees with the 2540M CPU is 8GB RAM @ 1333MHz NOT - I say again NOT, 16GB RAM @ 1333MHz.  Not even 16GB RAM @ 667MHz.


It would be nice if you answer questions asked.  What Motherboard?!?!!? What BIOS!??! - Or are you a RAM retailer lying about what some random E6420 would see, thus hoping to get some random sucker to buy more RAM than usable?  I would be wiling to *** my life on the QM67 chipset might possibly be used on ANY of the motherboards Dell put in this machine.  Please use your head for more than a hat rack!  lol.

Do you not know how to find out what motherboard and BIOS you have?  If not I can link you to many 'how to's on it for you, just let me know.

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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OS Name Microsoft Windows 10 Pro

Version 10.0.15063 Build 15063

System Manufacturer Dell Inc.

System Model Latitude E6420

System Type x64-based PC

Processor Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz,

2801 Mhz, 2 Core(s), 4 Logical Processor(s)

BIOS Version/Date Dell Inc. A24, 5/12/2017

SMBIOS Version 2.6

Hardware Abstraction Layer Version = "10.0.15063.0"

Installed Physical Memory (RAM) 16.0 GB

Total Physical Memory 15.9 GB

Available Physical Memory 13.1 GB

Total Virtual Memory 31.9 GB

Available Virtual Memory 29.1 GB

Page File Space 16.0 GB

Notes:

1. Windows 10 Pro Release 1607 (Version 14393) just upgraded to Windows 10 Pro Release 1703 (Version 15063) known as the Windows 10 Creators Update deployed by Microsoft to me in June 2017.

2. Removed Memory: Samsung DDR3, 2x4GB, 1333MHz, 1.5V, Model: M471B5273CH0-CH9

3. Added Memory: Corsair DDR3, 2x8GB, 1600MHz, 1.5V, Model: CMSX16GX3M2A1600C10

4. You must buy 1.5V memory for 2 and 3 generation Intel processors.

5. Corsair memory speed is backward compatible to 1333MHz to match the external bus speed.

Memory Comparison: Task Manager | Performance | Memory

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RE: Maximum RAM supported on E6420, i7 Quad Processor laptop running Win 7/64

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Samsung 2x4GB replaced with Corsair 2x8GB

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