Will this PSU work with my new video card?

Hello guys, It's been a while since I built a machine, since I got married i've been out of the loop and right now I have a dell xps 435t/9000 which came with the following.

Intel i7 920 @ 2.67Ghz
12 GB Ram
2 500gb hard drives
integrated sound card
Radeon 5870
PSU 475w (WOW....)

So a little while back I saw a cheap but good corsair CX 600 for a good price and since I expected to eventualy upgrade my video card, I bought and installed that PSU. it has a single rail 12v and does 40AMPS. I figured that would be enough.

Fast forward to a few days ago, my birthday is coming up and I decided to finaly go all out and get myself a GTX 770 Windforce, from gigabyte, the 4GB version because I eventualy plan to go 3 displays.

The card itself says it requires a 600w psu but then after I bought the card I noticed the gigabyte website says it requires 42AMP and my CX 600 only does 40.

I've done enough searching through this forums before posting (first post btw) and have found a lot of answers but not one that specificaly applies to my case and I rather be safe than sorry so I decided to ask.

Will those 2 extra amps the card requires be a problem? Or is my PSU good enough?

Thanks!
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More about psu work video card
  1. kuhne said:
    Hello guys, It's been a while since I built a machine, since I got married i've been out of the loop and right now I have a dell xps 435t/9000 which came with the following.

    Intel i7 920 @ 2.67Ghz
    12 GB Ram
    2 500gb hard drives
    integrated sound card
    Radeon 5870
    PSU 475w (WOW....)

    So a little while back I saw a cheap but good corsair CX 600 for a good price and since I expected to eventualy upgrade my video card, I bought and installed that PSU. it has a single rail 12v and does 40AMPS. I figured that would be enough.

    Fast forward to a few days ago, my birthday is coming up and I decided to finaly go all out and get myself a GTX 770 Windforce, from gigabyte, the 4GB version because I eventualy plan to go 3 displays.

    The card itself says it requires a 600w psu but then after I bought the card I noticed the gigabyte website says it requires 42AMP and my CX 600 only does 40.

    I've done enough searching through this forums before posting (first post btw) and have found a lot of answers but not one that specificaly applies to my case and I rather be safe than sorry so I decided to ask.

    Will those 2 extra amps the card requires be a problem? Or is my PSU good enough?

    Thanks!

    The CX600 should generally be able to handle it according to some forum users, but the main issue is that the i7 920@Stock speeds is simply not enough to handle the GTX 770, I would overclock to around 3.8 but you are using an OEM mobo and that effectively ruins it there. I would use the CX600, salvage the 12GB of RAM and maybe the 920 to start a new build.
  2. Hi Thanks for the reply.

    "Ruins" what exactly do you mean? Will it flat out not work? Nvidia customer service said the machine was fine to run it
  3. kuhne said:
    Hi Thanks for the reply.

    "Ruins" what exactly do you mean? Will it flat out not work? Nvidia customer service said the machine was fine to run it


    The issue is, that the i7 920@stock speeds is not enough to handle your 770 and since you have a Dell Motherboard, they do not overclock to acceptable speeds to take advantage of your upgrade. Your 5870 is fine for now and must have been starving for power with the 475W.
  4. So if i go on and install the 770 i will see increase in performance but will be less than what i would get with a faster cpu?
  5. kuhne said:
    So if i go on and install the 770 i will see increase in performance but will be less than what i would get with a faster cpu?

    A very significant margin less, I would get a decent X58 motherboard for the 920 and extract the CPU. I would get a decent cooler like the Hyper 212 EVO with dual fans. I would sell the 12GB RAM and especially the 5870 (massive demand for them being Bitcoin mines) which will let you get the motherboard and a decent case and ram. The 5870 will get you about $140 and the 12GB RAM should get you around 70$. I would also sell the CX600 for a X650 as the 920 will be drawing a LOT of power@3.8GHz. You will end up spending in the 200-300$ range more for the new parts, this is better than wasting money on triple monitors! Also, the GTX 770 may be significantly bottlenecked by the Dell Mobo's PCI-E 1 interface.

    Mobos :
    http://www.ebay.com/itm/ASUS-Rampage-III-Formula-ATX-Motherboard-Intel-X58-Socket-1366-W-RAID-/281127609558?pt=Motherboards&hash=item417482e4d6
    or
    http://www.ebay.com/itm/ASUS-Sabertooth-X58-LGA-1366-Intel-X58-SATA-6Gb-s-USB-3-0-ATX-Intel-Motherboard-/151066921254?pt=Motherboards&hash=item232c4a4926

    Case:
    http://www.ebay.com/itm/NZXT-CA-PH410-B1-Black-Steel-PHANTOM-ATX-Mid-Tower-Computer-Case-/380645954342?pt=US_Computer_Cases&hash=item58a0445326

    RAM:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16820233146

    Coolers:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099
    or
    http://www.amazon.com/Noctua-NH-U12P-SE2-Heat-Sink/dp/B002N2JVEE
    or
    http://www.newegg.com/Product/Product.aspx?Item=N82E16835181036
    or
    http://www.amazon.com/Noctua-Heatpipe-Bearing-Cooler-NH-D14/dp/B002VKVZ1A

    PSU:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151088

    If you are planning to go triple monitor, please use the Rampage III as it is superior to the Sabertooth X58 in PCI-E ports and has better modern SSD support (please get one down the road, you will be amazed!) If you cannot get the 770 on top of these, I strongly recommend you to get these first as they will be the set up for a full-performance 770 rig for later and the 5870 should be fine@high with SweetFX in mosts games until this winter when the next gen of games come around.
  6. Thanks Again Ill give those links a good read.

    Do believe you misinterpreted my system though. While your tips still apply and I'm very greatful for your info, this machine does have a locked mobo so no overclock is possible but it is already a x58mb with a pci express 2.0 port.
  7. kuhne said:
    Thanks Again Ill give those links a good read.

    Do believe you misinterpreted my system though. While your tips still apply and I'm very greatful for your info, this machine does have a locked mobo so no overclock is possible but it is already a x58mb with a pci express 2.0 port.


    Yes, another issue is that it has no SLi support (Needed for a decent 3 monitor setup) and maybe not even PCI-E 2.0 according to Dell's site. Instead of the 770, buy the Rampage III, you cooler of choice in the list and the other parts listed. When they are arriving, look up a video on how to build your system, sell the RAM (I am afraid it will not OC well) and keep your 5870 for now. Remember to PLEASE buy the 410 case because the Rampage III and possibly the 770 will not fit the small Dell OEM case.
  8. That's crazy that they don't say it had 2.0 as far as i know a x58 with a hd 5870 would have to be 2.0
  9. kuhne said:
    That's crazy that they don't say it had 2.0 as far as i know a x58 with a hd 5870 would have to be 2.0

    http://www.dell.com/us/dfh/p/studio-xps-9000/pd
    It only says PCI-E 16x (1) (Graphics)

    I would seriously consider my previous posts above wasting money on a 770 that can be better spent afterwards when the new-gen games come out.
  10. Update: http://www.ebay.com/itm/ASUS-Rampage-III-Formula-ROG-socket-1366-lga366-SATA-6Gb-s-USB-3-3-0-Motherboard-/181161095176?pt=Motherboards&hash=item2a2e0af008 The previous Rampage III link has ended/will be ending shortly, so this will be the next best option.
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