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Thread: 700W OCZ GameXStream Multi-GPU power supply testing

  1. #1
    Member On The Edge eva2000's Avatar
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    Cool 700W OCZ GameXStream Multi-GPU power supply testing

    I recently received a brand spanking new retail version of the 700W OCZ GameXStream Multi-GPU power supply from OCZ. Note there's a misprint on web page saying 4x +12v rails with 15A/each. It should be 4x +12v rails with 18A/each.

    This new quad +12v railed power supply is outsourced from Sparkle/FSP a different manufacturer than the PowerStream units (Topower) and is meant to be both ATI Crossfire and nVidia SLI ready with separate +12v rails for each of the two PCI-E power connectors. The only place that mentions the rail distributions for the 4x +12v rails is actually on the power supply itself. You can compare this to the 650W Silverstone SLI rev1 power supply i used here on the below system prior to swapping to the 700W OCZ GameXStream.

    The honey comb casing allows more air circulation for cooling the power supply. It seems when turned on you can really feel the air being pushed out the honey comb side vents!





    Full Specs:
    • 600W and 700W Configurations
    • OCZ PowerWhisper™ Technology
    • Multi-GPU ready
    • Internal 120mm dual ball bearing Protechnic Electric MGA12012HB-025 2500rpm 38dba fan
    • 3 year warranty backed by OCZ’s exclusive
    • PowerSwap™ replacement program.
    • 150 x 140 x 86mm
    • ATX12V v2.2 and EPS12V
    • OCZ ConnectAll™ universal connectors:
    • 1 x 20+4Pin ATX
    • 1 x 4-pin/8-pin CPU
      (supports double CPUs/supplies stable voltage)
    • 2 x PCI-E
    • 6 x 4-pin peripheral
    • 2 x 4-pin floppy
    • 6 x S-ATA
    • High efficiency
    • Active PFC
    • 80% @ 115V (Typical load) /
    • 83% @ 230V (Typical load)
    • Overvoltage/Overcurrent/Short-Circuit protection
    • Active PFC
    • MTBF:100,000 hours
    • 100~240Vac 10-5A 50/60Hz
    • Manual stated specs on the rails are shown here and OCP specs here . But there might be a typo or mistake in some of the listed specs as you can see the rail ratings on 600W vs 700W heh. Will ask OCZ to clarify them and update this info here


    Cables:
    - 4pin molex and FDD power connectors are organised into 2x cables each with 3x 4pin moldex + 1x FDD connectors.
    - 2x cables each with 3x SATA connectors
    - Included is a velcro strap to organise the cables too.


    Nifty features:
    There's a few nifty features i really like on this GameXStream power supply.
    1. Ever hurt your finger tips/hand trying to pry off a 4pin molex ? Well how about easy to grip 4pin molex connectors
    2. Need to use 4pin or 8pin cpu connector ? Well OCZ allows you to split or combine them to do away with any adaptors!
    3. 2x PCI-E connectors each labeled as PCI-E 1 and PCI-E 2. When using single card ensure you use PCI-E 1 connector



    Full pictures:
    http://i4memory.com/reviewimages/pow...xstream/html1/


    -----------------------------------------------------------------------
    Antec PSU Tester Results
    Link: http://i4memory.com/reviewimages/pow...xstream/html2/
    -----------------------------------------------------------------------

    2x 120x38mm Delta 3amp fans + 1x 120x38mm Panaflo 0.6amp fan = 6.6amp load
    +12v = 12.16v
    +5v = 5.06v
    +3.3v = 3.361v

    1x 120x38mm Panaflo 0.6amp fan = 0.6amp load
    +12v = 12.20v
    +5v = 5.04v
    +3.3v = 3.361v

    -------------------------------------------------------------------------------
    System Configuration:
    -------------------------------------------------------------------------------
    • Intel Pentium D Extreme Edition 3.46Ghz 955XE 65nm 2x2MB Cache SL94N (provided by Universal Abit Taiwan)
    • Cooled by Swiftech G4 Storm / Thermochill 120.3 with 3x 120x38mm Panaflo Fans /MCP650 on Kayl custom 100W psu
      Abit AW8D 975x 11 bios (provided by Universal Abit Taiwan)
    • 256MB BFG 7800GTX stock HSF with HeavyH20 473(525)/1350 bios
    • 2x512MB Corsair PC5400ULv1.5 3-3-2-8 DDR2 singles
    • 80GB Seagate Barracuda IV 7200 PATA hdd
    • Pioneer DVR-105 DVD-RW
    • Mitsumi Black 1.44MB FDD
    • 700W OCZ GameXStream Multi-GPU psu (retail psu provided by OCZ)
    • WinXP Pro SP2 / 84.56 Forceware / Intel INF 7.2.2.1006


    Additional fans:
    • 60x25mm Sunon fan (4.9W)over NB passive heatsink
    • 80x25mm Sunon high speed exhaust fan (4.3W) on motherboard tray
    • 120x25mm Thermaltake fan (0.4A) over memory modules
    • 120x38mm Panaflo High Speed fan (0.6A) on Zalman fan bracket cooling BFG 7800GTX stock hsf video card


    Wattage calculation:
    3.46Ghz 955XE rated at 1.25-1.4v vcore with 130W at stock. AUTO Vcore in bios = 1.2875v bios /1.24v uGuru windows
    256MB BFG 7800GTX ~125W
    1x PATA hdd ~11W
    Additional fans = 16.9W @ 12.00v

    Using calculator at http://www.extreme.outervision.com/psucalculator.jsp system totals approximately:
    955XE @stock with 1.3v vcore = 489W (100% utilisation) or 416W (85% utilisation)
    955xe @4600Mhz with 1.4v vcore = 629W (100%) or 535W (85%)
    955xe @4600Mhz with 1.45v vcore = 659W (100%) or 560W (85%)
    955xe @4600Mhz with 1.5v vcore = 689W (100%) or 586W (85%)
    955xe @4600Mhz with 1.55v vcore = 721W (100%) or 613W (85%)
    955xe @4600Mhz with 1.6v vcore = 753W (100%) or 640W (85%)
    955xe @4700Mhz with 1.45v vcore = 669W (100%) or 569W (85%)
    955xe @4700Mhz with 1.5v vcore = 699W (100%) or 594W (85%)
    955xe @4700Mhz with 1.55v vcore = 731W (100%) or 621W (85%)
    955xe @4700Mhz with 1.55v vcore = 763W (100%) or 649W (85%)
    955XE @4800Mhz with 1.55 vcore = 741W (100%) or 630W (85%)
    955XE @4800Mhz with 1.6v vcore = 775W (100%) or 659W (85%)

    -------------------------------------------------------------------------------
    System Test Results
    -------------------------------------------------------------------------------
    Note:
    1. The Abit AWD8 bios and uGuru windows monitoring apps report both +12v (24pin) and +12v (4pin) voltages whereas for DMM readings i will only be able to obtain one value off a molex.
    2. I'm running 17x204FSB due to an issue i have running >231FSB i suspect it might be 955XE cpu having issues as i tried both Abit provided AW8-Max 955x and AW8D 975x motherboards and same 231FSB limitation in that any >231FSB, quad prime after 15-20mins or quad superpi will error out on AW8-Max or reboot on AW8.


    -----------------------------------------------------------------------
    @17x204FSB at 1.2875v bios = 1.24v windows

    Readings according to Bios / uGuru Windows / DMM

    Idle
    +12v (24pin) = 12.31v / 12.30v / 12.24-12.25v
    +12v (4pin) = 12.31-12.37v / 12.24-12.31v-12.36v / 12.24-12.25v
    +5v = 5.11-5.14v / 5.10v / 5.06v
    +3.3v = 3.31-3.33v / 3.30-3.32v / Not measured

    Load with Quad Stressprime 2004
    +12v (24pin) = 12.31v / 12.30v / 12.21-12.23v
    +12v (4pin) = 12.31-12.37v / 12.24-12.31v-12.36v / 12.21-12.23v
    +5v = 5.11-5.14v / 5.10v / 5.07v
    +3.3v = 3.31-3.33v / 3.30-3.32v / Not measured

    DMM Datalogging via RS-232
    My new Digitech QM1538 Digital Multimetere (DMM) has windows datalogging function via RS-232 serial connection. I had to buy a RS-232 to USB adaptor since Abit AW8D doesn't have a serial port. Straight from QM1538 user manual:
    With the high technology of the integrated Ó-Ä converter, QM1538 Data Logger provides the high accurate way on the data testing and data logging which can conveniently change the ACV, DCV, ACA, DCA, Resistant, Capacitance, Frequency, Temperature, etc. to the digital signals for computer. With the highly insulated optical RS-232 connector, you can transfer the records to the computer for further processions.

    QM1538 Data Logger can automatically test and adjust the suitable values on each range accordingly. During the voltage, resistance and current testing, it can also be set to test a specified range by the push buttons.

    The QM1538 Data Logger can easily test and log the data on the voltages from 0.1mV to 600V, resistance from 0.1 Ohm to 40M Ohm, currents from 10µA to 10A, capacitance from 10pF to 100µF, frequencies from 1Hz to 10MHz, temperatures from .50°C to 750°C.

    Not all the data transferred to the computer can be viewed on the digital and analogue ways, but can also be recorded, saved, automatically graphed and then processed and printed.

    Electric function specifications
    * Accuracy is indicated with ±(% reading+ digits), environmental temperature 23± 5°C, Humility < 75%

    DCV:
    * 400mV, 4V, 40V, 400V : ± (0.5% + 5)
    * 600V : ± (0.8% + 5)
    * Input Impedance : 10MŮ (about 10GŮ at 400mV range)
    Still @17x204FSB at 1.2875v bios vcore, I logged both windows idle and quad stressprime load using datalogger to obtain +12v rail min/max/average values over a 3min interval for idle and 20min interval for load testing.

    Idle vs Load

    -----------------------------------------------------------------------
    Now this is where there's problems with the DMM data logging it seems when i overclock the cpu the data logger abruptly disconnects from logging and crashes itself even while quad stressprime 2004 continues to run. The PWM1 to PWM4 temps are very high doing quad stressprime reaching 68-73+ C on the motherboard

    @4711Mhz at 1.5875v bios / 1.53v windows idle / 1.45v under load vcore. Dam too much drooping of the vcore

    Idle vs Load


    Unfortunately, had to stop quad stressprime as PWM temps were 68-73+ and datalogging disconnected abruptly. The load screenie was the last screenie i made before datalogging disconnected.

    The system total wattage @4700Mhz at 1.45-1.55v vcore is very close or just a tad over the max combined load that this psu is rated for @680W combined. Wonder if this is what is causing the datalogging to crap out ? Or just plain old heat on the cpu and PWM causing instability ?

    955xe @4700Mhz with 1.45v vcore = 669W (100%) or 569W (85%)
    955xe @4700Mhz with 1.5v vcore = 699W (100%) or 594W (85%)
    955xe @4700Mhz with 1.55v vcore = 731W (100%) or 621W (85%)
    955xe @4700Mhz with 1.6v vcore = 763W (100%) or 649W (85%)

    Rail fluctuations:
    The 955XE is a beast of a cpu rated at 130W just at stock. Increasing vcore and overclocks really do draw quite an amount of juice off the psu! I will be retesting with a Pentium D 920D which is rated at 95W at stock so should be fun to see the differences and impact on the GameXStream power supply

    Despite the huge power draw, the all important +12v rail has around 0.175 to 0.330% fluctuation and +5v rail seems to jump +0.01v under load or +0.197% from my DMM readings at each overclocked setting

    Will know soon if the psu or cpu is maxed out as my Kayl custom phase change unit is complete and soon to be shipped to me http://i4memory.com/showthread.php?p=41359#post41359




    .

  2. #2

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    Looking good Eva, nice to see it is capabale of supplying that 955 you have there at such high clocks.

    Can't wait to see your phase results

    T

  3. #3
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    Nice review Eva - wondering if this should not be moved to the Review section or at minimum in the Case and Power forum section and be sticked there for better exposure ....

    Very well done as usual.....

    Curious about this comment:

    2x PCI-E connectors each labeled as PCI-E 1 and PCI-E 2. When using single card ensure you use PCI-E 1 connector
    Why, is that a MUST ?
    BB_One.... Out !
    _________________________________
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    OCZ EL DDR PC-3200 Gold VX
    OCZ EL Platinum 4800 Elite Edition
    Sapphire Radeon X850XT PE ~ 585/630
    OCZ PowerStream 520W

    ---------------------------------------

  4. #4
    Member On The Edge eva2000's Avatar
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    PCI-E 1 is a must as Ryder said so hehe

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    Quote Originally Posted by eva2000
    PCI-E 1 is a must as Ryder said so hehe

    LOL- that sure makes for a great technical explanation, let's see what Eric has to say about that.

    Odd this is....as the Pci-e rail presumably is independant and I assume just bridged to provide 2 outputs, hence does not compute unless something else is going on.
    BB_One.... Out !
    _________________________________
    DFI NF4 Ultra-D bios 704-2BT
    A64 Clawhammer 4000+ @ 2750MHz or 2835Mhz depending on mem
    OCZ EL DDR PC-3200 Gold VX
    OCZ EL Platinum 4800 Elite Edition
    Sapphire Radeon X850XT PE ~ 585/630
    OCZ PowerStream 520W

    ---------------------------------------

  6. #6
    OCZ Forum Support Manager RyderOCZ's Avatar
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    PCI-e 1 and PCI-e 2 are on 2 separate rails. The PSU needs a balanced load on its 12V rails in order to put out full capacity, so PCI-e 1 needs to be loaded for max output.

    I will get confirmation on rail distribution, but here is the info I have from the Beta units.

    12V1 - CPU 1
    12V2 - CPU 2, PCIe 2
    12V3 - Motherboard, SATA, 4-pin molex
    12V4 - PCIe 1
    Problems with your OCZ Product? PM or E-mail Me



  7. #7
    Member On The Edge eva2000's Avatar
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    balanced load = cross loading ?

    got the specific minimum amperages needed on each rail for max output ?

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    OCZ Forum Support Manager RyderOCZ's Avatar
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    Bingo...that is the term I was looking for EVA

    I will have to ask the office if there is even a spec for that...but from what I have been able to determine here...it is very small....something like 1A on 12V4 (PCI-e 1)
    Problems with your OCZ Product? PM or E-mail Me



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    It should be 4x +12v rails with 18A/each.
    12V1 - CPU 1
    12V2 - CPU 2, PCIe 2
    12V3 - Motherboard, SATA, 4-pin molex
    12V4 - PCIe 1
    Dunno about you but quote from eva + quote from Ryder = for me 18 amps per rails and pci-e 1 has dedicated rail 4 and rail 2 is bridged between Cpu2 and Pci-e 2.

    Max per rail is 18 amps - but combined 12 volts power rails amps draw - cannot exceed stated combined wattages for all 4 rails @ 12 volts + 3.3v + 5v, what ever wattage it is; cannot find info on that. If 3.3 and 5 volts is not considered in the equation (doubtfull), maybe we can derive and understand where the 15 amp stated earlier comes from 4 x12 x15= 720 Watts ???? Many ways to state PSU numbers and vendors use different ways so dunno about this one here...

    Why would you need minimum amp draw on each rail for max output ? I don't understand that one ?

    Edit: saw the link in your original thread Eva for the rail specs - seems 155 watts max permitted for combined 3.3 + 5. Hence leaves 680watts (max for combined of them all) - 155 = 525 watts total for 12 volts rails - in other words if all 4 rails totally loaded max AMP per rail is shy of 11 Amps per rail, IF 3.3 and 5 are indeed fully loaded also and drawing 155 watts.

    Kind of like this flexible design, looking forward to Elite and adjustable rails.

    Still cannot understand why a minimum amp per rail would / is needed all comes from same big transformer and then splitted ?

    Unless a different type of design, and dedicated transformer per rail ? - nah .....
    Last edited by BB_One; 05-18-2006 at 09:50 AM.
    BB_One.... Out !
    _________________________________
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    A64 Clawhammer 4000+ @ 2750MHz or 2835Mhz depending on mem
    OCZ EL DDR PC-3200 Gold VX
    OCZ EL Platinum 4800 Elite Edition
    Sapphire Radeon X850XT PE ~ 585/630
    OCZ PowerStream 520W

    ---------------------------------------

  10. #10
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    BTW Eva - you watch way to many RoBoCop movies....

    Manual stated specs on the rails are shown here and OCP specs here
    BB_One.... Out !
    _________________________________
    DFI NF4 Ultra-D bios 704-2BT
    A64 Clawhammer 4000+ @ 2750MHz or 2835Mhz depending on mem
    OCZ EL DDR PC-3200 Gold VX
    OCZ EL Platinum 4800 Elite Edition
    Sapphire Radeon X850XT PE ~ 585/630
    OCZ PowerStream 520W

    ---------------------------------------

  11. #11
    BE Defined
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    Quote Originally Posted by Just Learnin'
    BGP BGP BGP BGP BGP BGP BGP BGP BGP BGP BGP BGP BGP BGP BGP......

  12. #12
    OCZ Forum Support Manager RyderOCZ's Avatar
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    OCP = Over Current Protection

    Max Current on all 12V rails combined is 50A.
    Last edited by RyderOCZ; 05-18-2006 at 10:58 AM.
    Problems with your OCZ Product? PM or E-mail Me



  13. #13

    • bf2nut's Rig Specs
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    why am i thinking a 520 or 600 watt powerstream has better components in it?i dunno?i like a rear exit fan as well...weird me knowing the hot air is def going out of the case\psu itself?adj rails are a must,should be ocz standerd.ocz owns antec period...rok solid units.was thinking of new 600 watt powerstrem,now this?same money as 600 powerstream? ryder which one is constant 12v on the rails plz.tthe new 1 looks like a modstream with differnt caps(more power?)wording saying 700 watts,and new case?

  14. #14
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    been testing the Ocz gameXtream 700W also..

    Testing the new OCZ PC2-8000 Plat XTC Ram also.

    and this is my system:

    Asus P5WD2-E premium mobo (fully modded)
    Intel Pentium D 940 @ 5287 Mhz (under dry ice)
    1Gb (512x2) OCZ PC2-8000 Plat XTC @ 5-5-5-15, 2.1V, at DDR1100 Mhz
    ATI Crossfire X1900's (X1900 CF edition with X1900XTX slave card)
    1 120GB HD
    1 DVDRW

    This is a BIG load on a power supply and it is going strong.



    Running the Above PSU calculator,

    I am running 770W under 100% and about 657W under 85%. But due to I am running under Dry Ice, I am throwing off the Thermal design power calculations off a Bit.
    Last edited by nutcase; 05-21-2006 at 02:54 PM.

  15. #15
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    Awesome writeup Eva......veryvery cool.....

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