Precision 3640 memory upgrade

Achieving 2933MHz should have nothing to do with XMP support.  Not sure where that came from.  As long as the 3640 has an I7, I9, or Xeon, 2933MHz should be achievable.

I'd try a different brand of RAM, like Crucial, which comes recommended often for Dell's.  I run A-Tech RAM.  A little less costly than Crucial, but also has a lifetime warranty.

Not that Kingston products never work, but we've seen failures.

It's not said if you're running non-ECC or ECC RAM?

As for BIOS having XMP support, I think it has to come with it, but may be one of our other members or experts will know for sure.

Precision 3640 Documentation 

Thanks, you are right about XMP, but if 3640 had XMP support, then at least I would be able to select the best usable profile available in Kingston Fury I already have.

It is my understanding, that 3640 uses the "default" (lowest) speed offered by the memory module. Memory modules are labelled and marketed based on the highest speed and only in few cases I have been able to find out what the module's default speed is.

I'm looking for non-ECC RAM. I belive ECC RAM would be compatible, too.

@bradthetechnut 

"Achieving 2933MHz should have nothing to do with XMP support. Not sure where that came from." 

If you have proof otherwise about DDR4 2933 (1466 Mhz) XMP please post the information.

XMP requirement for 2933 came from the basic JEDEC and INTEL specifications.

  @DELL-Chris M  has posted the 2666 and 2933 limitation based on which 10th Gen core unlocked cpu is used on an XMP Capable motherboard.  Dell Ships 3200 ram with systems but that does not mean ALL CPUS , Generations, Motherboards can get up to that speed. Dell does not support retail ram only OEM ram works without issue.

10th Gen

Intel Core i3/i5 processors, are limited to 2666MHz

Intel Core i7/i9 processors, are limited to 2933MHz

This is also why vendors list the JEDEC profiles as well as the XMP Profiles for the given clock speeds.

https://www.crucial.com/support/articles-faq-memory/what-is-xmp

If you install XMP memory in a non-XMP motherboard the memory will simply run at JEDEC timings the computer decides.

Speeds past JEDEC SPD timing are XMP and overclocking, Require unlocked CPU and are not covered under warranty by Dell , AMD , INTEL.

The Mhz Myth is marketing not performance. 4266 Ram is not 5X faster than 2133 ram.

https://www.jedec.org/standards-documents/focus/memory-module-designs-dimms/all/all

Unlocked 10th Gen processors with boards that have XMP capability can Do 2933 or Higher based on XMP profiles and the quality of the ram.   CAS latency counts a lot more than the Mhz Myth.

Clock will be

DDR4 2133 (1066 Mhz)
DDR4 2400 (1200 Mhz)
DDR4 2666 (1333 Mhz)
DDR4 2933 (1466 Mhz) XMP
DDR4 3200 (1600 Mhz) XMP

DDR4 3400 (1700 Mhz) XMP

JEDEC DDR4-2666 CL20-19-19 @1.20V
XMP    DDR4-3400 CL20-23-23 @1.40V

@jap247,

Yes, the 3640 can take both non-ECC and ECC RAM.  You probably already know they can't be mixed.

Hopefully RAM isn't being mixed.  Otherwise, there's the possibility of a reduction in performance.  System will operate at the speed of the slowest stick.  But I did notice you didn't mix speeds.

@speedstep,

"If you have proof otherwise about DDR4 2933 (1466 Mhz) XMP please post the information."   Where do you get 1466MHz for 2933MHz RAM?  XMP slows it down?

Please see screengrab from the 3640 manual.  It says nothing about needing XMP to achieve 2933MHz.  Probably has something to do with the 3640 not having XMP.  Might also be why TMP isn't mentioned in the CPU list.

"Not sure where that came from."   Then just say where it does come from without opening with red letters and demanding proof.

In case you haven't noticed these last 3+ years, if I know you posted something inaccurately, do I demand proof or start an argument?  Or do I stick to the facts and post proof without opening with @speedstep?  it needs to be about the facts, not you and me.

@bradthetechnut 

"In case you haven't noticed these last 3+ years, if I know you posted something inaccurately, do I demand proof or start an argument?  Or do I stick to the facts and post proof without opening with @speedstep? It needs to be about the facts, not you and me."

(you posted something inaccurately) what exactly?

Despite the "Achieving 2933MHz should have nothing to do with XMP support. Not sure where that came from." comment.

I do actually own a Precision 3640.  I can speak with authority about what it can or cannot do.

It does not have to mention XMP because the standards for this are Known for both AMD and INTEL. Unlike JEDEC, XMP speeds are higher Mhz and Voltage. This is also why INTEL ARK says up to a specific speed not guaranteed for all parts, chipsets, motherboards, bios. If you install XMP memory in a non-XMP motherboard, or don’t have XMP enabled, the memory will simply run at lowest JEDEC timings the computer reads from the SPD rom. 

Intel® Extreme Memory Profile (Intel® XMP)

https://www.intel.com/content/www/us/en/gaming/extreme-memory-profile-xmp.html

"It says nothing about needing XMP to achieve 2933MHz"

It would be an argument if the facts were disputed.

They are not and your point is moot.

The facts are written and well known.

Mhz is not performance its marketing

4266 ram is not 2X faster than 2133 ram.

just as power supplies are not a single rail with a single spec of watts.

Facts are JEDEC / IEEE / ISO standards not you tube videos.

These are the Facts .

(CAS * 2000) / MHZ = Latency (ns)

This means anything over JEDEC 2666  1.2V  is XMP overclocking and over voltage requiring unlocked CPU, chipset, and XMP BIOS setting. If that's not accurate provide the reference where it isn't the fact.

https://www.jedec.org/content/pc4-2666-unbuffered-dimm-2

Overclocking your unlocked processor, RAM, and motherboard is possible on some systems but it is not covered under warranty and not guaranteed by DELL/AMD/INTEL etc.

@speedstep 

"It does not have to mention XMP because the standards for this are Known for both AMD and INTEL. Unlike JEDEC, XMP speeds are higher Mhz and Voltage. This is also why INTEL ARK says up to a specific speed not guaranteed for all parts, chipsets, motherboards, bios. If you install XMP memory in a non-XMP motherboard, or don’t have XMP enabled, the memory will simply run at lowest JEDEC timings the computer reads from the SPD rom."

Well said.  I thought that might be what you were getting at, this explains it better.

@bradthetechnut 

XMP overclocking and over voltage carries a "risk of hardware failure and higher temperatures,"

Altering the frequency and/or voltage outside of Intel specifications may void the processor warranty.

Examples: Overclocking and enabling Intel® XMP, which is a type of memory overclocking.

Altering clock frequency or voltage may damage or reduce the useful life of the processor and other system components,
and may reduce system stability and performance. Product warranties may not apply if the processor is operated beyond its specifications.

Its not Just INTEL or Dell its also AMD policy.

“AMD’s product warranty does not cover damages caused by overclocking, even when overclocking is enabled via AMD hardware and/or software. This would include any form of memory overclocking.”

So if you paid $499 for a CPU and $399 for Ram do you really want to risk that for a slight performance increase at the cost of reduced component life?

 Some ram XMP increase the voltage from 1.2 to 1.6 volts and the clock from 1333 Mhz to 1600Mhz up to 2666Mhz clock aka 5333 ram double over clock of 1333 and well past 1.2v

https://www.newegg.com/g-skill-16gb-288-pin-ddr4-sdram/p/N82E16820374185

https://www.kingston.com/tw/memory/search/model/101353/dell-alienware-precision-3640-tower

https://www.crucial.com/compatible-upgrade-for/dell/precision-3640-tower

I did put 4 Micron MTA4ATF1G64AZ-3G2E1 modules in and memory clocks at 2933 MHz. These modules will be EOL by the end of this year.

Before these Micorn modules I did try some Kingston's but they did not clock at 2933 MHz.

I think the bigger risk is calculation errors and corrupted data. That's why I never used XMP even on my Alienware R8

KCP432ND8/32 Kingston 32GB
PC4-25600 DDR4-3200MHz CL22 1.2V
Dual Rank Memory Modules

Work fine @2933

What people want however is 1.35V CAS14 @3200 which requires XMP and unlocked K series CPU.

@Koko79​ so what is this meaning? I couldn't find way to Chang me speed on bios.

Is there a way to max it?