Need to chosse psu for 560gtx

Hi im trying to find a osu for 560gtx-ti twin froze ii oc i need to support it to suppor later sli

my build

intel i5-3750k

asus maxiums V GENE

yes im going to oc the gpus so any sugestions thx in advance :D
8 answers Last reply
More about need chosse 560gtx
  1. you need 700 - 760W for plan SLI .. just buy good recommend PSu review and depend your budget :D
  2. if you are looking for a cheap half decent PSU look at an OCZ ZS Series 750W. This is the cheapest PSU I can find in my country (UK) that has 4x 6pin PCI connectors and that is from a reputable brand. I'd suggest this if you are tight for budget, which really it doesn't look like you are (buying a high end mobo). Something with a bit more power would be nice though.

    I can say from when I've hooked up my PC (OCed 2500k and OCed Asus 560 Ti) to a watt-meter I've got 440W from the wall (running Prime95 and Furmark), so around 350W being drawn from the PSU. A QUALITY 750W+ would be ok for 2 cards, my calculations adding in 2 GPU loads makes it 720W (drawn from PSU), and that's with Prime95 and Furmark running, actual gaming use I found to be over 100W less.

    Although a bigger one wouldn't hurt, as PSUs run more efficiently at 40-60% load, as well as having a bit of headroom is nice.

    For other forum members here are my measurements for if you want to know how much power MY 560 ti and i5 2500k draw:

    -----------------------------------------------------------------------------------
    PC with CPU at 4.4GHz 1.3v + GPU at 920 core and stock voltages-

    actual gaming (BF3): 290W
    CPU at 100% with prime95: 180W
    GPU at 100% with furmark: 360W
    combined P95 + FM: 440w

    ------------------------------------------------------------------------------------
    PC with CPU at 4.9GHz 1.5v + GPU at 1GHz 1150mV (maxed out worst case scenario)

    CPU at 100% with prime95: 250W
    GPU at 100% with furmark: 480W
    combined P95 + FM: 590W

    ALL MEASUREMENTS ARE TAKEN FROM THE WALL, so add in the rough 0.8x calculation for the PSU efficiency.
  3. Hi i currently overclocking @ 4.5ghz 24-7 use and i am running X2 Gigabyte GTX 560TI in SLI mild overclocking on those as well you need 750Watts this is the one i am currently using http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021&cm_sp=Cat_Power_Supplies-_-Spotlight-_-17-139-021 but if your on a budget you could always get something like this http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=419877&Sku=T925-3083 i have a few friends that use it and they are also running GTX 560TI in SLI hope this helps
  4. thx for the help

    so you guys suggest i get a 850watt psu found this one http://www.newegg.com/Product/Product.aspx?Item=N82E16817139022
  5. Yeah that is the one i have and it has not let me down you could even get something like this though http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=419877&Sku=T925-3083 you really only need 750watt if money is a issue get that but if i was you i go with 850watt for better upgrade paths later and sufficient breathing space.
  6. For a system using two MSI N560GTX-Ti Twin Frozr II/OC graphics cards in 2-way SLI mode a minimum of a 700 Watt or greater power supply that has a combined +12 Volt continuous current rating of 54 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors is recommended.

    Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important factor.
  7. As much as the power (Watts) requirement matters, the current requirement, measured in Amps is as important if not even more important. This is especially true if you have a or several dedicated video card(s). As a general rule of thumb, you’re aiming for the highest number on the 12V line.
  8. Power Supplies that are certified 80 PLUS have been independently tested for their efficiency. Now, there are 4 different 80 PLUS certifications, depending on how efficient the power supply is:

    80 PLUS: The power supply is at least 80% efficient at 20%,50% and 100% load
    80 PLUS Bronze: The power is at least 82% efficient at 20% and 100% and 85% efficient at 50% load.
    80 PLUS Silver: The power is at least 85% efficient at 20% and 100% and 88% efficient at 50% load.
    80 PLUS Gold: The power is at least 87% efficient at 20% and 100% and 90% efficient at 50% load.

    The 80 PLUS and higher certifications are the way to go when you are looking for an efficient power supply.

    Do not trust specifications such as “Efficiency: 80% to 85% Efficiency Typical” that are not 80PLUS certified. 80 PLUS is an independent standard test. No 80 PLUS and “Efficiency: 80% to 85% Efficiency Typical” means that it is 80% to 85% efficient, according to the manufacturer that is, using their own in-house test, which may or may not so much represent real efficiency.
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