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Thread: How to Identify UTT-BH from UTT-CH ???

  1. #1
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    How to Identify UTT-BH from UTT-CH ???

    Hello.

    I got a pair of 512MB Kreton/VT (UTT) + BP808 and was wondering how to identify if they're UTT-BH or UTT-CH.

    The rules of BH-5 vs CH-5 that I know are:
    - BH-5 cannot boot with CAS3
    - CH-5 cannot use tRFC 12
    - BH-5 usually 200Mhz <2.8v 2-2-2-X

    Now, my Kreton do boot with CAS3 but also do tRFC 12. Another thing is that they need 3.1v to pass Memtest86 at 200Mhz 2-2-2-x !

    Any idea? I smell they're UTT-CH but I need your experience to identify these.

    Ps. They do 250Mhz 2-2-2-8 as tight as it gets 7-12-00-2-1-2 with 3.4V .


    My Personal Records:

    Infineon BH-6 (1x256MB) at 290MHz [2-2-2-5] at 4.0V // CPU-Z
    // PIC
    Infineon BH-6 (2x256MB) at 270MHz [2-2-2-5] at 3.63V // PIC // BENCH 1 // BENCH 2
    Kreton UTT (1x512MB) at 270MHz at 3.35V [2-2-2-5] // CPU-Z // PIC
    Infineon BH-6 (4x256MB) at 270MHz at 3.8V [2-2-2-5] // CPU-Z // BENCHMARKS


  2. #2
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    Quote Originally Posted by Aleman
    BH-5 usually 200Mhz <2.8v 2-2-2-X
    ^
    i'd say this is the rule #1 for identifying.
    [SIGPIC][/SIGPIC]

  3. #3
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    If you can see the chip code.....

    1J-50 1C-50 etc = CH
    2J-50 2C-50 etc = BH

    In my experience...no guarantees unfortunately but if they pass at 2.8v 2-2-2 and have a 2X-50...they should be BH

  4. #4
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    ive been wondering about how to identify these blank chips, lol

  5. #5
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    Please test your sticks individually. If I'm not mistaking (could be that I tested the other pair), they booted fine at 200MHz 2-2-2-10 with 2.7V in my DFI.
    Could be that one stick is CH- and the other BH-based, although I doubt that. IMHO, all VT 512MB PC3200 sticks seem to be BH-based, at least the ones I had here, behaved like BH-based RAM. I got 2x 256MB VT UTT RAM that behaves differently, clearly like CH-based RAM.
    BTW, what board and bios are you using?
    And the thing is:
    They don't need to be stable at 200MHz with a voltage under 3V, to indicate they are BH-based. If they post at a voltage of 2.7-2.9V at 2-2-2-x timings then they are usually BH-based. CH-based RAM wouldn't even post at that volts with these timings.
    The fact that they might not be stable at those volts with 2-2-2-x timings, just underlines that they are UTT (UnTesTed). But after a burn-in, that could change.
    Quote from one of our professors:
    "Reality is hiding in the imaginary part."

  6. #6
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    "Another thing is that they need 3.1v to pass Memtest86 at 200Mhz 2-2-2-x !"

    they are CH.
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  7. #7
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    yea, my bh-5 on my value ram will pass memtest @ 2-2-2-X w/ 2.6v

  8. #8
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    Booting @ 200MHz 2-2-2-x is not enough. My CH-UTTs boot fine @ 2.6V.
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  9. #9
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    UTT-CH5 will NEVER run at trfc12... not even at 200

    C

  10. #10
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    I always go by the 2-2-2-5 200fsb voltage. I've never seen CH-die memory boot with anything under 3v. BH-5 and BH-die will boot up somewhere around 2.6-2.7v.
    The little air system that could.


  11. #11
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    @Charlie: Well mine do! lol

    It seems I got a weird mixture coz I can boot at CAS 3 and tRFC 12.

    Hey, maybe they´re UTT-DH U neverknow...

    I´ll test them separately, thx guys.

    @Celemine. Mach dir keine Sorgen, mir ist es egal ob die CH based oder BH based sind .


    My Personal Records:

    Infineon BH-6 (1x256MB) at 290MHz [2-2-2-5] at 4.0V // CPU-Z
    // PIC
    Infineon BH-6 (2x256MB) at 270MHz [2-2-2-5] at 3.63V // PIC // BENCH 1 // BENCH 2
    Kreton UTT (1x512MB) at 270MHz at 3.35V [2-2-2-5] // CPU-Z // PIC
    Infineon BH-6 (4x256MB) at 270MHz at 3.8V [2-2-2-5] // CPU-Z // BENCHMARKS


  12. #12
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    Quote Originally Posted by charlie
    UTT-CH5 will NEVER run at trfc12... not even at 200

    C
    My pair of TwinMos SP CH-UTT does tRFC 12 200MHz ~12h Stress Prime stable.
    No recollection about voltage and such.

    Guess I'm going to have to dig up the screenie... or run Prime again.
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  13. #13
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    I remember that UTT´s are "improved" from their original die. So maybe the UTT-CH is that way improved so it can run tRFC 12 .


    My Personal Records:

    Infineon BH-6 (1x256MB) at 290MHz [2-2-2-5] at 4.0V // CPU-Z
    // PIC
    Infineon BH-6 (2x256MB) at 270MHz [2-2-2-5] at 3.63V // PIC // BENCH 1 // BENCH 2
    Kreton UTT (1x512MB) at 270MHz at 3.35V [2-2-2-5] // CPU-Z // PIC
    Infineon BH-6 (4x256MB) at 270MHz at 3.8V [2-2-2-5] // CPU-Z // BENCHMARKS


  14. #14
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    hmmm

    The real give away is operating 1T in NF2 boards at high FSB...230-240-250Mhz. BH just cant cut that.

    That was the great thing about CH UTT, even not great sticks in A64....sub 250Mhz could find a happy home in NF2 systems as 512M sticks that did 1T while no others would.
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  15. #15
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    yea 1T and high fsb isnt easy to get on NF2

  16. #16
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    Quote Originally Posted by charlie
    UTT-CH5 will NEVER run at trfc12... not even at 200

    C
    Note the tRFC...

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  17. #17
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    Easiest way to differentiate is that BH UTT cannot do CAS 3 at all, it is a chip limitation.

  18. #18
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    UTT CH-5 chip in 0.13µm

  19. #19
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    Quote Originally Posted by computersmsa
    UTT CH-5 chip in 0.13µm
    CH = 0.15
    BH = 0.17

    im sure the 'UTT brand' kept the same process. i could be wrong here though about utt in respect to process size.
    Last edited by pershoot; 06-30-2005 at 07:35 AM.
    Testing-
    ---
    DFI LP DK 790FXB-M2RSH - 1/16 Beta
    ---
    Phenom II X4 940 (CACVC AC 0850BPDW), 3.82GHZ (19x201) @ 1.46v (+150mv), NB: 2.61GHZ (x13) @ 1.3375v (11), HT: 2.61GHZ, PCI-E: 101MHZ, CPU: P-1 state
    ---
    OCZ Reaper, 2x2GB @ 2.015v, MaxMemClk-1066-5-5-5-15-20-195x4, DDR2-536, Tony's 1066 Phenom SPD
    ---
    Corsair HX620, Swiftech 2xMCR120-QP + MCRES-Micro, MCP-655, Vortex XP (D-tek Fuzion v1), 1/2"

  20. #20
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    Quote Originally Posted by RyderOCZ
    If you can see the chip code.....

    1J-50 1C-50 etc = CH
    2J-50 2C-50 etc = BH

    In my experience...no guarantees unfortunately but if they pass at 2.8v 2-2-2 and have a 2X-50...they should be BH
    This is in reference to OCZ Winbond BH/CH only. These IC codes listed above are specific to OCZ.

  21. #21
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    Quote Originally Posted by pershoot
    CH = 0.15
    BH = 0.17

    im sure the 'UTT brand' kept the same process. i could be wrong here though about utt in respect to process size.
    Absolutely untrue.



    CH-X = 0.13um
    BH-X = 0.175um
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