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DDR3 1600 11-11-11-28 4GB & DDR3 1333 9-9-9-24 2GB in one system.

hi... i inserted 4 gb hynix DDR3 1600 11-11-11-28 & 2 gb hynix DDR3 1333 9-9-9-24 in my system.... will i get better performance with a single stick of 4gb@1600mhz ? I mainly use my laptop for gaming. Can you guys help ..... here are my ram report

Physical Memory:
Total 5608 MB
Used 1715 MB
Free 3893 MB
Utilization 31 %

Swap Space:
Total 11215 MB
Used 2050 MB
Free 9165 MB
Utilization 18 %

Virtual Memory:
Total 16823 MB
Used 3765 MB
Free 13059 MB
Utilization 22 %

Paging File:
Paging File C:\pagefile.sys
Current Size 5608 MB
Current / Peak Usage 0 MB / 0 MB
Utilization 0 %

Physical Address Extension (PAE):
Supported by Operating System Yes
Supported by CPU Yes
Active Yes


--------[ SPD ]---------------------------------------------------------------------------------------------------------

[ DIMM1: SK Hynix HMT351S6CFR8C-PB ]

Memory Module Properties:
Module Name SK Hynix HMT351S6CFR8C-PB
Serial Number 051027D3h (3542552581)
Manufacture Date Week 23 / 2012
Module Size 4 GB (2 ranks, 8 banks)
Module Type SO-DIMM
Memory Type DDR3 SDRAM
Memory Speed DDR3-1600 (800 MHz)
Module Width 64 bit
Module Voltage 1.5 V
Error Detection Method None
Refresh Rate Normal (7.8 us)
DRAM Manufacturer SK Hynix

Memory Timings:
@ 800 MHz 11-11-11-28 (CL-RCD-RP-RAS) / 39-128-5-12-6-6-24 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 761 MHz 10-10-10-27 (CL-RCD-RP-RAS) / 37-122-5-12-6-6-23 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 685 MHz 9-9-9-24 (CL-RCD-RP-RAS) / 33-110-5-11-6-6-21 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 609 MHz 8-8-8-22 (CL-RCD-RP-RAS) / 30-98-4-10-5-5-19 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 533 MHz 7-7-7-19 (CL-RCD-RP-RAS) / 26-86-4-8-4-4-16 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 457 MHz 6-6-6-16 (CL-RCD-RP-RAS) / 22-74-3-7-4-4-14 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 380 MHz 5-5-5-14 (CL-RCD-RP-RAS) / 19-61-3-6-3-3-12 (RC-RFC-RRD-WR-WTR-RTP-FAW)

Memory Module Features:
Auto Self Refresh Supported
Extended Temperature Range Supported
Extended Temperature Refresh Rate Not Supported
On-Die Thermal Sensor Readout Not Supported

[ DIMM2: SK Hynix HMT325S6BFR8C-H9 ]

Memory Module Properties:
Module Name SK Hynix HMT325S6BFR8C-H9
Serial Number 145218C4h (3289928212)
Manufacture Date Week 2 / 2011
Module Size 2 GB (1 rank, 8 banks)
Module Type SO-DIMM
Memory Type DDR3 SDRAM
Memory Speed DDR3-1333 (667 MHz)
Module Width 64 bit
Module Voltage 1.5 V
Error Detection Method None
Refresh Rate Normal (7.8 us)
DRAM Manufacturer SK Hynix

Memory Timings:
@ 666 MHz 9-9-9-24 (CL-RCD-RP-RAS) / 33-107-4-10-5-5-20 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 609 MHz 8-8-8-22 (CL-RCD-RP-RAS) / 30-98-4-10-5-5-19 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 533 MHz 7-7-7-20 (CL-RCD-RP-RAS) / 27-86-4-8-4-4-16 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 457 MHz 6-6-6-17 (CL-RCD-RP-RAS) / 23-74-3-7-4-4-14 (RC-RFC-RRD-WR-WTR-RTP-FAW)
@ 380 MHz 5-5-5-14 (CL-RCD-RP-RAS) / 19-61-3-6-3-3-12 (RC-RFC-RRD-WR-WTR-RTP-FAW)

Memory Module Features:
Auto Self Refresh Supported
Extended Temperature Range Supported
Extended Temperature Refresh Rate Not Supported
On-Die Thermal Sensor Readout Not Supported
7 answers Last reply Best Answer
More about ddr3 1600 4gb ddr3 1333 2gb system
  1. Both Ram will run at the frequency of the memory with lower frequency.

    4 GB ram is more than enough for daily tasks and gaming, if you are sure that you will not use more than 4GB ram then remove the 2 GB stick from laptop.

    4GB ram at 1600 MHz is more performing than 6GB ram at 1333Mhz. but if your ram usage goes more than 4GB then it is better to have 6GB ram at 1333MHz.

    Most likely your ram usage won't go above 4GB, so i would recommend , use the 4GB ram alone.

    Ram timings make more difference than ram speed, 9-9-9-24 are more performing than 11-11-11-24. But if you use both the stick 4GB will always run at 11-11-11-24 and not at 9-9-9-24. so if you run both 4Gb and 2GB, you are not getting any timings benefit anyhow and you are loosing your Frequency benefit.
  2. Tyk3 said:
    Both Ram will run at the frequency of the memory with lower frequency.

    4 GB ram is more than enough for daily tasks and gaming, if you are sure that you will not use more than 4GB ram then remove the 2 GB stick from laptop.

    4GB ram at 1600 MHz is more performing than 6GB ram at 1333Mhz. but if your ram usage goes more than 4GB then it is better to have 6GB ram at 1333MHz.

    Most likely your ram usage won't go above 4GB, so i would recommend , use the 4GB ram alone.


    but one of the memory timing in the above report is given as 685 MHz 9-9-9-24 for 4gb so should'nt it use this timing when in conjuction with other 9-9-9-24
  3. Best answer
    Yes, i didn't see the complete Ram details which you added. What you are saying might be correct, the 4gb module might start running at the tighter timings when dropping down to 685MHz frequency because of the 2GB ram. Plug them in both and see what frequency 4GB module runs at, if it runs at 685 MHz and uses the 9-9-9-24 timings then it is great and you are good to use both of them. tighter timings are better than more frequency.
  4. Tyk3 said:
    Yes, i didn't see the complete Ram details which you added. What you are saying might be correct, the 4gb module might start running at the tighter timings when dropping down to 685MHz frequency because of the 2GB ram. Plug them in both and see what frequency 4GB module runs at, if it runs at 685 MHz and uses the 9-9-9-24 timings then it is great and you are good to use both of them. tighter timings are better than more frequency.


    How can i check what frquency 4GB module is running at ?
  5. Get CPU-Z from internet. It is a software that shows details about your CPU and some other hardware. Go to the memory tab on it and on the left there will be a menu giving memory slots, choose the memory slot which shows your 4GB module in the details. You will see the memory frequency given in the details.
  6. Tyk3 said:
    Get CPU-Z from internet. It is a software that shows details about your CPU and some other hardware. Go to the memory tab on it and on the left there will be a menu giving memory slots, choose the memory slot which shows your 4GB module in the details. You will see the memory frequency given in the details.


    here is what it tells me....
    Northbridge AMD A55/A60M/A88 FCH rev. 00
    Southbridge AMD A55/A60M rev. 11
    Graphic Interface PCI-Express
    PCI-E Link Width x0
    PCI-E Max Link Width x0
    Memory Type DDR3
    Memory Size 6 GBytes
    Channels Dual
    Memory Frequency 674.1 MHz (3:20)
    CAS# latency (CL) 9.0
    RAS# to CAS# delay (tRCD) 9
    RAS# Precharge (tRP) 10
    Cycle Time (tRAS) 24
    Bank Cycle Time (tRC) 33
    Uncore Frequency 1312.3 MHz

    so i guess both the modules are running @1333 9-9-9-24
  7. Yes it is correct. you are good to go.
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