How do I know if I have enough power?

I upgraded not too long ago to an XFX Radeon HD 6790 and it wound up using 2 pci-e power connectors where my old card used one. The performance has not been where it should so I am starting to wonder if I have enough power. My PSU is an OCZ ModXStream pro 700W. I have listed my full specs below.

MSI 870A-G54 Motherboard (not the FX one)
4 GB of Corsair XMS3 DDR3 RAM 9-9-9-24
OCZ ModXStream Pro 700w PSU
AMD Athlon II 635 Propus 2.9GHz
AMD Radeon HD 6790 (dual fan)
Asus DVD rom drive
2 500GB Seagate Barracuda 7200 rpm hard drives
1 80GB Seagate Barracuda 7200 rpm hard drive
5 case fans (with blue leds except one)
Asus PCE-N10 wireless card
Zalman CNPS 7500 Cu LED cpu fan
Windows 7 Ultimate (dunno if that matters)
and I have an 360 controller, webcam, microphone, mouse and keyboard and a few usb cable for things plugged into it.
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  1. How do I know if I have enough power?

    Stopping by here was a good idea.

    That OCZ ModXStream Pro 700W should be getting plenty of power to your system.

    In what way has 'performance has not been where it should'?

    How has the performance changed with the graphics card swap? Any other changes made?

    What card did you replace?
  2. I had a PNY Nvidia GTS 250 and it has more pop in and less fps. I kinda lags more than the old card as well. I also completely cleaned my comp recently so it is a fresh install.
  3. sixstring88 said:
    I had a PNY Nvidia GTS 250 and it has more pop in and less fps.
    Pop in? What is that?
  4. AMD Radeon HD 6970 Graphics System Requirements
    http://www.amd.com/us/products/desktop/graphics/amd-radeon-hd-6000/hd-6970/Pages/amd-radeon-hd-6970-overview.aspx#3

    --> 550 Watt or greater power supply with one 150W 8-pin PCI Express® power connector and one 75W 6-pin PCI Express® power connector recommended
  5. WR2 said:
    Pop in? What is that?


    i think he means certain things pop onto the screen rather then coming into view from a distance.
  6. WR2 said:
    AMD Radeon HD 6970 Graphics System Requirements
    http://www.amd.com/us/products/desktop/graphics/amd-radeon-hd-6000/hd-6970/Pages/amd-radeon-hd-6970-overview.aspx#3

    --> 550 Watt or greater power supply with one 150W 8-pin PCI Express® power connector and one 75W 6-pin PCI Express® power connector recommended

    sixstring88 said:
    XFX Radeon HD 6790
  7. Yikes!
    6790. That's hardly an upgrade over GTS 250.
  8. WR2 said:
    Yikes!
    6790. That's hardly an upgrade over GTS 250.

    ;)
  9. Yea still dunno why it isn't as powerful as my GTS 250 :-(
  10. You can always run your numbers over with some online wattage calculator like thisone here: http://support.asus.com/powersupply.aspx
  11. The new fresh install done before or after the GPU change? If before might be driver issue.
  12. Before and after. I did it twice :-P
  13. The Asus thing said I would be using 650 is that enough power? I know mine says 700 but someone in a thread somewhere that my power supply only puts out like 550.
  14. A 500W PSU would be plenty of power for your system.
  15. eXtreme Power Supply Calculator Lite is suggesting a 400W PSU is about right for your system
    http://extreme.outervision.com/PSUEngine
  16. WR2 said:
    eXtreme Power Supply Calculator Lite is suggesting a 400W PSU is about right for your system
    http://extreme.outervision.com/PSUEngine

    Agree with that result!
    Some calculators like ASUS and Newegg really exaggerate the power need (legal issue, probably because of so many crap PSU's on the market that do not deliver the promised output)
  17. Oh alright thanks guys :-)
  18. I ran Prime 95 cause I might overclock and was gonna just make sure everything was good before and was gonna run it again after. Well even not OC'd my comp crashed...
  19. Run Memtest86+


    What kind of crash?
    Had you been monitoring your temps?
  20. I just went to prime 95 and clicked test and went to see if it was actually running anything and the sound started skipping and I got these white static looking lines on the screen then the blue screen of death and a restart :-/
  21. Right - run Memtest86+
  22. Well I found out it was overclocked apparently by my mobo with the OC Genie feature. I ran Unigine Heaven on it earlier by the way and it didn't do horrible performance wise, however certain buildings or in some cases everything in some scenes would disappear every once in a while or kinda flicker. Does anyone know what that could mean?
  23. sixstring88 said:
    certain buildings or in some cases everything in some scenes would disappear every once in a while or kinda flicker. Does anyone know what that could mean?
    That sounds like a driver issue to me.
  24. hmm :-/ Any ideas on how to fix it?
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