RAM upgrade (ProBook 4520s)

[alaouiali]

I have a ProBook 4520s.

I followed this thread and bought the following RAM for my laptop:

4 Go 
DRAM 
DDR3 SDRAM 
SO DIMM 204 broches 
1333 MHz ( PC3-10600 ) 
CL9 
NON ECC 
512 x 64 X8 
1.5 V

 Here is the link

The problem:

During power up, my laptop starts correctly until reaching the windows loading logo (Win7 Pro 64bit) and then restarts.

I tried I live Mint Linux one a USB drive, linux also restarts during power up.

In the BIOS, i can see that the laptop recognizes the added memory. (6G total 4G new + 2G old)

If I remove the added memory and leave the old one, the laptop starts normaly

If I leave only the new memory, the laptop restarts exaclty like before (restarts after win7 starts to load)

Hope you can help !

Thanks

PS: I forgot to mention the memory I already have. Its from Micron, here is the info and the link

2 Go
DDR3 SDRAM
204-pin
1333 MT/s
CL = 9 
Non ECC
256 Meg x 8
1.5V

[jakub_g]

---

@sam781 wrote:

here is my Laptop's RAM info -

Memory slots
	Total memory slots	2
	Used memory slots	2
	Free memory slots	0
Memory
	Type	DDR3
	Size	6144 MBytes
	Channels #	Dual
	DRAM Frequency	665.3 MHz
	CAS# Latency (CL)	9 clocks
	RAS# to CAS# Delay (tRCD)	9 clocks
	RAS# Precharge (tRP)	9 clocks
	Cycle Time (tRAS)	24 clocks
	Command Rate (CR)	1T

Slot #1
	Type	DDR3
	Size	4096 MBytes
	Manufacturer	Apacer Technology
	Max Bandwidth	PC3-10700 (667 MHz)
	Part Number	78.B2GC9.9K10C    
	Serial Number	02011223
	Week/year	22 / 11
	SPD Ext.	EPP
		JEDEC #4
			Frequency	685.7 MHz
			CAS# Latency	9.0
			RAS# To CAS#	9
			RAS# Precharge	9
			tRAS	25
			tRC	34
			Voltage	1.500 V
		JEDEC #3
			Frequency	609.5 MHz
			CAS# Latency	8.0
			RAS# To CAS#	8
			RAS# Precharge	8
			tRAS	22
			tRC	30
			Voltage	1.500 V
		JEDEC #2
			Frequency	533.3 MHz
			CAS# Latency	7.0
			RAS# To CAS#	7
			RAS# Precharge	7
			tRAS	20
			tRC	27
			Voltage	1.500 V
		JEDEC #1
			Frequency	457.1 MHz
			CAS# Latency	6.0
			RAS# To CAS#	6
			RAS# Precharge	6
			tRAS	17
			tRC	23
			Voltage	1.500 V

Slot #2
	Type	DDR3
	Size	2048 MBytes
	Manufacturer	Samsung
	Max Bandwidth	PC3-10700 (667 MHz)
	Part Number	M471B5773CHS-CH9  
	Serial Number	671A71EA
	Week/year	07 / 11
	SPD Ext.	EPP
		JEDEC #5
			Frequency	685.7 MHz
			CAS# Latency	9.0
			RAS# To CAS#	9
			RAS# Precharge	9
			tRAS	25
			tRC	34
			Voltage	1.500 V
		JEDEC #4
			Frequency	609.5 MHz
			CAS# Latency	8.0
			RAS# To CAS#	8
			RAS# Precharge	8
			tRAS	22
			tRC	30
			Voltage	1.500 V
		JEDEC #3
			Frequency	533.3 MHz
			CAS# Latency	7.0
			RAS# To CAS#	7
			RAS# Precharge	7
			tRAS	20
			tRC	27
			Voltage	1.500 V
		JEDEC #2
			Frequency	457.1 MHz
			CAS# Latency	6.0
			RAS# To CAS#	6
			RAS# Precharge	6
			tRAS	17
			tRC	23
			Voltage	1.500 V
		JEDEC #1
			Frequency	381.0 MHz
			CAS# Latency	5.0
			RAS# To CAS#	5
			RAS# Precharge	5
			tRAS	14
			tRC	19
			Voltage	1.500 V

My question is why there is 1 more JEDEC in slot#2?

---

Sam781

Are you using 4520s? I have 4520s (originally with 3gb ram - 2 + 1) and i can only install 2x2gb, 1x4gb or 2x4gb. When i've tried 4gb + 2gb it only see 4gb of ram (windows 8.1 x64). Where can be issue? it depends of hardware config?

i have F.21 bios.

I've bought 4gb ram module and I can only use it as desktop decoration 😞

Can anyone help???

[MLange]

---

@jakub_g wrote:

Are you using 4520s? I have 4520s (originally with 3gb ram - 2 + 1) and i can only install 2x2gb, 1x4gb or 2x4gb. When i've tried 4gb + 2gb it only see 4gb of ram (windows 8.1 x64). Where can be issue? it depends of hardware config?

i have F.21 bios.

I've bought 4gb ram module and I can only use it as desktop decoration 😞

Can anyone help???

---

Sorry for the bump. I had this exact problem. This is also addressed in another thread: "Re: HP Probook 4520s Memory upgrade to 8GB (2x4GB) Corsair Unsuccessful and Failed".

2x4GB Sticks / 8GB kits that are unsuccessful:

• Mushkin 996647
• Mushkin 997066
• Corsair CMSO8GX3M2A1333C9

Successful:

• G.Skill F3-10666cl9d-8gbsq

At the time of this posting, the only difference between working an non-working ones are how the RAM is laid out on the module. Does your RAM have 8 chips per stick, or 16?