Do I need a bigger PSU for SLI Titan X

[atingf]

I am looking to put a second Titan x in my PC and was wondering if I will need to up my PSU or will my current one be enough.

specs:

i7 4770k @ 4.4ghz
32gb of corsair vengeance ram
MSI gd67 z87 mobo
Corsair h100I
4x120mm fans
2x200mm fans
3x7200rpm HDDS
1x SSD
1000w PSU

 

[ko888]

If you have a high quality 1000W PSU it'll be more than sufficient to do the job.

A high quality 850W PSU would have been more than sufficient.

System Power Supply Requirements for two GeForce GTX TITAN X graphics cards in 2-way SLI mode
• NVIDIA specifies a minimum of a 850 Watt or greater system power supply. (Minimum system power requirement based on a PC configured with an Intel Core i7 3.2GHz 130 Watt TDP processor.)
• the system power supply must also have a maximum combined +12 Volt continuous current rating of 60 Amps or greater
• the system power supply should also have at least two 75-Watt 6-pin and two 150-Watt 8-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) is the most critical factor.

Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.

 

[atingf]

If you have a high quality 1000W PSU it'll be more than sufficient to do the job.

Thanks for the fast reply I am using a Corsair RM1000 is that a good psu? sorry don't really know a good PSU from a bad one.

 

[ko888]

Corsair RM1000 (SKU# 75-002136 / CP-9020062)
• OEM: CWT (Channel Well Technology)
• maximum combined +12 Volt continuous current rating: 83.3 Amps <===== Way more than Sufficient
• eight 150-Watt (6+2)-pin PCI Express supplementary power connectors <===== More than Sufficient
• Ambient Temperature Maximum (i.e. without derating): 40°C
• Full Modular Output Cables: Yes
• Official Intel Haswell Compliance: Yes
• 80 PLUS GOLD Efficiency Certification
• 5 Year Limited Warranty

You won't be stressing it.