Is my Memory running ok? (Extra JEDEC listed)

[Studio_Muppet]

Extra JEDEC #6?

I purchased this http://tinyurl.com/2urvxgl 2GB stick to upgrade my laptop to 4GB. Because I'm mixing manufacturers (Micron & Samsung) I wanted to make sure all is fine by running CPUz diagnostics and noticed that the Micron module has an extra entry in the JEDEC Timing Table (it lists JEDEC #6 10.0-10-10-28-38 @ 761 MHz) I also noticed the Micron stick appeared to have a different number of chips on the stick of RAM too compared to the Samsung RAM.
 
-Is this normal? -Do you think I'm getting Dual channel from this mix of manufacturers?
I guess the worst case scenario is ordering up another 2GB Micron stick so that I have identical pairs, but everything seems okay so far.
Notebook model: HP G62-a15SA

Please see below for memory info extracted by CPUz:
Chipset
-------------------------------------------------------------------------
Northbridge AMD 785GX rev. 00
Southbridge AMD SB800 rev. 40
Memory Type DDR3
Memory Size 4096 MBytes
Channels Dual, (Unganged)
Memory Frequency 532.5 MHz (3:8)
CAS# latency (CL) 7.0
RAS# to CAS# delay (tRCD) 7
RAS# Precharge (tRP) 7
Cycle Time (tRAS) 20
Bank Cycle Time (tRC) 27
Command Rate (CR) 1T
Uncore Frequency 1597.4 MHz
Memory SPD
-------------------------------------------------------------------------
DIMM # 1
SMBus address 0x50
Memory type DDR3
Module format SO-DIMM
Manufacturer (ID) Micron Technology (2C00000000000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number 8JSF25664HZ-1G4D1 
Serial number 3116004D
Manufacturing date Week 29/Year 10
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-17-23 @ 457 MHz
JEDEC #3 7.0-7-7-20-27 @ 533 MHz
JEDEC #4 8.0-8-8-22-30 @ 609 MHz
JEDEC #5 9.0-9-9-25-34 @ 685 MHz
JEDEC #6 10.0-10-10-28-38 @ 761 MHz

DIMM # 2
SMBus address 0x51
Memory type DDR3
Module format SO-DIMM
Manufacturer (ID) Samsung (CE00000000000000)
Size 2048 MBytes
Max bandwidth PC3-10700 (667 MHz)
Part number M471B5673FH0-CH9  
Serial number 78FDDF59
Manufacturing date Week 14/Year 10
Number of banks 8
Nominal Voltage 1.50 Volts
EPP no
XMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 5.0-5-5-14-19 @ 380 MHz
JEDEC #2 6.0-6-6-17-23 @ 457 MHz
JEDEC #3 7.0-7-7-20-27 @ 533 MHz
JEDEC #4 8.0-8-8-22-30 @ 609 MHz
JEDEC #5 9.0-9-9-25-34 @ 685 MHz

[erico]

Hi,

What you need is to look at the memory tab on the CPU-z instead of the SPD TAB.

All SPD tells you is the capabilities of each memory stick where the memory tab tells you the mode hat your system board is running the installed memory. In the case of my system, dual channel symmetric and that is the best possible scenario for my ASUS Rampage Formula motherboard.

best regards,

erico

[Studio_Muppet]

Hi erico!

Thank you for your response, noted that SPD only gives capabilities -does having an extra JEDEC listed on my new RAM stick and not the other matter?

Also I noted a change in the NB Frequency & DRAM Frequency when comparing the original 3GB configuration to my new 4 GB configuration: Old Vs New Config

Is this quite normal?

Sorry for my lack of knowledge, I want to be sure I'm not compromising performance by mixing RAM from different manufacturers.

[erico · Accepted solution]

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@Studio_Muppet wrote:

Hi erico!

Thank you for your response, noted that SPD only gives capabilities -does having an extra JEDEC listed on my new RAM stick and not the other matter? It does not matter. Those are the primary, secondary timings and voltage  that a BIOS can use to automatically set the memory at given FSB speeds.

Also I noted a change in the NB Frequency & DRAM Frequency when comparing the original 3GB configuration to my new 4 GB configuration: Old Vs New Config

Is this quite normal?

The speed of the memory will default to the slowest speed. Consider yourself lucky that it booted into Windows. Most don't have that kind of luck and are frustrated in having new memory that doesn't work in their notebook. 😉  

Sorry for my lack of knowledge, I want to be sure I'm not compromising performance by mixing RAM from different manufacturers. If the added memory is slower than the original memory then you will have slowed memory operations down and essentially lost some performance. I see that it runs in dual channel. That is a surprise. Lucky you! 🙂

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Best regards,

erico