sodimm What's wrong with my sodimms? Bios: 2133 but sodimm labelled 2400

[Srishunbagasundaran]

So my dell inspiron came with SK hynix 4gb 2400mhz RAM. This one:

 

I recently bought from ebay, another 4gb 2400 sodimm for 40AUD, I thought ot was a good deal:

 

The problem is even though these sticks are 2400, in the Dell insprion bios they are 2133:

2-in-1:

 

+ new ram:

 

Where did the rest of the MHz go? And how would I go about finding them?

 

Cheers for any info.

[LukeSavenije]

which one? some only support up to 2133

[BubblyCharizard]

probably the CPU memory controller is 2133

 

 

what CPU do you have?

[Srishunbagasundaran]

19 minutes ago, BubblyCharizard said:

probably the CPU memory controller is 2133

 

 

what CPU do you have?

the inspiron has i5-7200u

[BubblyCharizard]

4 minutes ago, Srishunbagasundaran said:

the inspiron has i5-7200u

Memory Specifications

• Max Memory Size (dependent on memory type) 32 GB
• Memory Types DDR4-2133, LPDDR3-1866, DDR3L-1600
• Max # of Memory Channels 2
• Max Memory Bandwidth 34.1 GB/s
• ECC Memory Supported ^‡ No

https://ark.intel.com/products/95443/Intel-Core-i5-7200U-Processor-3M-Cache-up-to-3-10-GHz-

[mariushm]

Your cpu officially supports maximum 2133 Mhz as you can see here (scroll down to memory specs): https://ark.intel.com/products/95443/Intel-Core-i5-7200U-Processor-3M-Cache-up-to-3-10-GHz-

 

Unofficially, the processor is most likely capable of higher frequencies but it's up to the motherboard manufacturer to make the board well enough (layout of physical wires aka traces on the circuit board, placement of slots etc) and to program the BIOS to recognize and configure higher frequencies. 

 

The memory sticks have a tiny memory chip which contain several presets, some that are standardized by JEDEC (an organization that does memory standards) and some that are non-standard. Your memory sticks probably contain presets for 1866 mhz, 2133 Mhz and 2400 Mhz and the bios of your laptop probably automatically picks the highest preset that it supports which would be 2133 Mhz.

The bios may or may not have somewhere the option to force the higher preset, 2400 Mhz.

 

However, my guess is that increasing the frequency really won't give you a significant plus in performance.

[Srishunbagasundaran]

14 minutes ago, mariushm said:

Your cpu officially supports maximum 2133 Mhz as you can see here (scroll down to memory specs): https://ark.intel.com/products/95443/Intel-Core-i5-7200U-Processor-3M-Cache-up-to-3-10-GHz-

 

Unofficially, the processor is most likely capable of higher frequencies but it's up to the motherboard manufacturer to make the board well enough (layout of physical wires aka traces on the circuit board, placement of slots etc) and to program the BIOS to recognize and configure higher frequencies. 

 

The memory sticks have a tiny memory chip which contain several presets, some that are standardized by JEDEC (an organization that does memory standards) and some that are non-standard. Your memory sticks probably contain presets for 1866 mhz, 2133 Mhz and 2400 Mhz and the bios of your laptop probably automatically picks the highest preset that it supports which would be 2133 Mhz.

The bios may or may not have somewhere the option to force the higher preset, 2400 Mhz.

 

However, my guess is that increasing the frequency really won't give you a significant plus in performance.

I wasn't looking to improve performance besides more tabs on chrome, hence the +1 stick. I was more confused at the difference. Now, i feel foolish for not looking up intel's site.  It all makes sense now. Considering it's more of a student/businessy 2-in-1, it's designed for better battery. I was under the impression the bios was default to something like my pc was, when i first built it. And I needed to change soemthing in bios to get full ram. Completely forgot to consider cpu/mobo/Dell limiters.

 

Thankks again all