RAM in hp 250 g4 (W4M21ES)

[Vsiszaru]

What frequency, timings, bandwidth, ddr3, ddr3l or ddr4?
Different sites give different information, I can not find my laptop on the official site, AIDA 64 gives some information, only the bandwidth that doesn`t correspond to the given AIDA 64 is written on the bar.

[mdklassen]

Google-search for "download free SPECCY".

Download, install, and run it, and expand the 'RAM' section, for details about RAM "timings".

Tell us what it reports.

[Vsiszaru]

Memory slots
Total memory slots 2
Used memory slots 1
Free memory slots 1
Memory
Type DDR3
Size 4096 MBytes
Channels # Single
DRAM Frequency 797.5 MHz
CAS# Latency (CL) 11 clocks
RAS# to CAS# Delay (tRCD) 11 clocks
RAS# Precharge (tRP) 11 clocks
Cycle Time (tRAS) 28 clocks
Command Rate (CR) 1T
Physical Memory
Memory Usage 47 %
Total Physical 3.90 GB
Available Physical 2.06 GB
Total Virtual 7.80 GB
Available Virtual 5.22 GB
SPD
Number Of SPD Modules 1
Slot #1
Type DDR3
Size 4096 MBytes
Manufacturer Micron Technology
Max Bandwidth PC3-14200 (889 MHz)
Part Number 8KTF51264HZ-1G9P1

___________________________________
What is it "Max Bandwidth PC3-14200 (889 MHz)"?

[mdklassen · Accepted solution]

> Total memory slots 2
> Used memory slots 1
> Free memory slots 1

One "empty" slot for another stick.

> Memory Type DDR3, Size 4096 MBytes

Double Data Rate RAM.

Currently, one stick of 4 GB.

> Channels # Single

When writing one byte (8 bits) to the RAM, 8 "cycles" will be required.

In "Dual Channel" mode, only 4 "cycles" will be required -- 4 bits go to one stick at the same time as the other 4 bits go to the other stick. 

Obviously, the RAM will be faster.

> DRAM Frequency 797.5 MHz

Probably a "clock" of 800 Mhz.

Since it is "double data rate", it actually is 1600 Mhz.

> Physical Memory
> Memory Usage 47 %
> Total Physical 3.90 GB

About 0.10 GB is "borrowed" by the motherboard, becoming "not available" to Windows.

> Available Physical 2.06 GB

Windows is currently using 1.84 GB of RAM.

> Total Virtual 7.80 GB
> Available Virtual 5.22 GB

When Windows "fills" the RAM, it will write some "pages" of RAM to the "swap-file" (pre-sized at twice the 3.90 GB) to free-up some RAM for the "next" application that needs RAM.

> SPD

Serial Presence Detect -- a tiny chip on each stick, giving the characteristics of the  stick.

> Slot #1
> Type DDR3
> Size 4096 MBytes
> Manufacturer Micron Technology
> Part Number 8KTF51264HZ-1G9P1

> Max Bandwidth PC3-14200 (889 MHz)

The RAM is "rated" as PC3-12800 (800 Mhz) for normal use, but some geeks can "overclock" the RAM, to make it run slightly faster.  Some "overclocking" motherboards can adjust the clock to pulse more quickly.