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Thread: Mixing 6400 with 5400 ?

  1. #1
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    Mixing 6400 with 5400 ?

    So far I got no answers to my thread here :
    https://forums.hexus.net/corsair-memory/96919-mixing-6400-5400-a.html

    This forum is always busier so I hope my simple question can get a quick answer.

    Can I have 5400 1GB old memory sitting in one bank with new added 6400 2GB sitting in another ?
    Can it cause any probs if all is set to a reasonable speed, let's say 5400's nominal 667MHz ?
    Both sets are effectively "matching" incl latencies ... (and the same price for 2GB of 6400 and 5400 !)
    The only diff appears to be the nominal max speed.

    Thanks and Regards

    Robert

    ----------------------------------------------------------------------------------------------------------------------------------------------------------
    August VI (my wife's system) : Dell Inspiron XPS M2010 , Intel Core 2 Duo T7200, 2GB 5300 (667) RAM, single HD 120GB, 256MB ATI Mobility RADEON X1800, 20.1" WSXGA
    August V (my main system, custom rig) : Asus P5AD2-E Premium 925XE, Intel P4 550 3.4GHz, Corsair TWIN2X2048-6400C4PRO 2GB [Corsair TWIN2X1048-5400C4PRO 1GB], XFX GF 8800 GTS 640MB [Asus EN6600GT-TD 128MB], 2x WD Raptor 74GB in RAID0, 2x Seagate Barracuda 7200.7 200GB in RAID0, NEC ND-3520A black, Sony CRX320E black, Mitsumi FA404M FDD + 7in1 card reader black, Enermax Noisetaker EG701AX-VE 600W, CM Stacker STC-T01 silver with cross flow fan, Akasa Fan Controller, Thermaltake smart blue LED fans, Iiyama ProLite E481S, MS Windows XP Pro, built Feb 2005, RAM + GPU upgraded Mar 2007
    August IV (retired) : upgraded Compaq DeskPro 575 (replaced CPU, added : RAM, graphic card, sound card, modem, HD, CD-ROM)
    August III (given away) : PC AT
    August II (retired) : Atari STM 520kB, monochrome monitor SM124
    August I (retired) : ZX Spectrum Plus
    ----------------------------------------------------------------------------------------------------------------------------------------------------------

  2. #2
    SeƱor Member Flewis's Avatar
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    • Flewis's system
      • Motherboard:
      • MSI P45 Platinum
      • CPU:
      • Intel E7200 @ 3.5GHz
      • Memory:
      • 4x1GB Corsair PC5400 @ 720MHz 4-4-4-11
      • Storage:
      • 2 x Samsung Spinpoint 500GB
      • Graphics card(s):
      • 2 x ATI HD4850
      • PSU:
      • 750W Silverstone Zeus
      • Case:
      • AOpen H700B custom watercooled
      • Operating System:
      • Vista HP x64
      • Internet:
      • Plusnet fibre
    They should both run together but will be limited by the max speed of the slower ram.

  3. #3
    S1L3NT danroyle's Avatar
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    • danroyle's system
      • Motherboard:
      • N/A
      • CPU:
      • Intel Core I7 4720HQ
      • Memory:
      • 8GB
      • Storage:
      • 128GB SSD +1tb HDD
      • Graphics card(s):
      • Geforce Gtx960m
      • PSU:
      • N/A
      • Case:
      • N/A
      • Operating System:
      • WINDOWS 10 64bit
      • Monitor(s):
      • 15.6" IPS
      • Internet:
      • BT Fibre
    you will also lose dual channel as well i would just run the 2gb set it is unlikely you would need more than that and the performance of the 2gb in dual channel would be better than 3gb in single channel at slower speed

  4. #4
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    Many thanks.

    It all sounds sensible.

    Regards

    Robert

    ----------------------------------------------------------------------------------------------------------------------------------------------------------
    August VI (my wife's system) : Dell Inspiron XPS M2010 , Intel Core 2 Duo T7200, 2GB 5300 (667) RAM, single HD 120GB, 256MB ATI Mobility RADEON X1800, 20.1" WSXGA
    August V (my main system, custom rig) : Asus P5AD2-E Premium 925XE, Intel P4 550 3.4GHz, Corsair TWIN2X2048-6400C4PRO 2GB [Corsair TWIN2X1048-5400C4PRO 1GB], XFX GF 8800 GTS 640MB [Asus EN6600GT-TD 128MB], 2x WD Raptor 74GB in RAID0, 2x Seagate Barracuda 7200.7 200GB in RAID0, NEC ND-3520A black, Sony CRX320E black, Mitsumi FA404M FDD + 7in1 card reader black, Enermax Noisetaker EG701AX-VE 600W, CM Stacker STC-T01 silver with cross flow fan, Akasa Fan Controller, Thermaltake smart blue LED fans, Iiyama ProLite E481S, MS Windows XP Pro, built Feb 2005, RAM + GPU upgraded Mar 2007
    August IV (retired) : upgraded Compaq DeskPro 575 (replaced CPU, added : RAM, graphic card, sound card, modem, HD, CD-ROM)
    August III (given away) : PC AT
    August II (retired) : Atari STM 520kB, monochrome monitor SM124
    August I (retired) : ZX Spectrum Plus
    ----------------------------------------------------------------------------------------------------------------------------------------------------------

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