Inspiron 5570 Ram Speed Issue?

Question

I have an Inspiron 5570 that my Dad purchased over a year ago (his warranty is expired) from Costco. When he sent me the specs and knowing how he plans on using it (YouTube, Netflix, internet, solitaire, and some banking/accounting), I told him that it was a good system. Within a couple of months, he has had nothing but speed issues with it that I have been able to narrow down to 100% HDD usage for hours on end (only ~45Gb is being used out of 932Gb). After running the Windows 10 2004 update, this seems to have been cut down to under 10 minutes of 100% usage for now, until you change something affecting the HDD such as install/uninstalling a program regardless of its size.

I have noted no strange apps outside of what Dell has installed and what I or my Dad have installed (Office, Quicken, Norton...).

Today I ran CPU-Z found that the 12Gb of DDR4-2400 memory is running at 665.1Mhz (1330Mhz), nearly half its rated speed. I have go through the BIOS looking for any related setting I can change and I have even done a reset to factory default settings with no change in this. A Windows 10 Memory Diagnostic scan turned up no errors.

At this point, I am about to recommend to him that he get some new memory (Crucial or Corsair) and consider a 1Tb ssd as I have no idea why the memory would be running ~55% of its rated speed.

DDR4-2400 Memory Dell 5570

JTHill3574 · Answer

So I've removed each RAM stick and successfully started the laptop each time. Unfortunately, the speed issue remained a constant 1330Mhz instead of the desired 2400Mhz.

Nobody has any answer or solution.

The Adder · Answer

1333 MHz clock speed is actually 2666 MHz effective speed thanks to it being double data rate RAM. So, your RAM is actually running at 2666MHz. https://en.wikipedia.org/wiki/DDR_SDRAM

The Adder · Answer

@JTHill3574 Sorry my mistake, I didn't read your post correctly and missed the 665 Mhz/1330MHz part, so forget my previous comment that was wrong! What do the SPD timing in CPU-Z tables tells you (frequency ~1200Mhz) ?

JTHill3574 · Answer

@The Adder That's okay. CPU-Z only shows JEDEC #9 to #12 for the 4Gb module and JEDEC #6 to #9 for the 8Gb module. If I use Thaiphoon, it shows SPD rev. 1.1 and starts as low as 667MHz CAS 10 and goes to 1200MHz CAS 21.

FYI - Module #0 is 4Gb and Module #1 is 8Gb. I have removed each and started the laptop with only 1x4Gb and 1x8Gb only for the results to be the same within CPU-Z.

If I'm understanding all that I have read recently correct, the use of these dissimilar RAM modules should make no difference so long as the voltages are both 1.2V and they have the same overlap in the minimum timing delays and supported read latencies.

Inspiron

Inspiron 5570 Ram Speed Issue?

Was this post helpful?