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What GPUs am I able to use with my Alienware X-51 R3?

I currently own an Alienware X-51 R3 with a GTX 745. I've been looking into upgrading my gpu for some time now, and keep hitting roadblocks. I want the best card I can fit and power in my desktop, but it has an external 240w power brick (with the ability to upgrade to 340w I believe). Most gpus I've looked into either can't fit in my case, or require more power. I already tried Alienware tech support and they suggested the GTX 1050ti. Is this my best option?

Also, Is it possible to buy a normal psu and just re-connect everything to that?

As you can probably tell, I'm new here and don't know too much about this. Any help is appreciated.
Reply to sam_tessari
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  1. Best answer
    The GTX 745 is an OEM card, so it's a little tough to judge where it 'sits' performance-wise (and therefore, what would be a worthwhile upgrade) but, from what I can find/judge/guess, it sits somewhere in the GT730-GT740 space.

    Looking at a couple of videos, there appears to be a decent amount of physical space for a GPU:
    https://www.youtube.com/watch?v=2dpa4vb0PW8

    But the power options are obviously a stumbling block.

    The GTX745 is a ~55W TDP card. Anything worthwhile upgrading is going to be a minimum 75W TDP, if not more (a GTX 1060, for example is 120W).

    It does appear to use standard PSU connectors though - so a replacement PSU is an option BUT there's nowhere to put a "normal" PSU in there - so you'd need to migrate to a new case.
    https://www.youtube.com/watch?v=-RQ-IW8fIqs
    Reply to Barty1884
  2. Not sure if you looked into it, but dell has the alienware graphics amplifier:
    http://www.dell.com/en-us/shop/alienware-graphics-amplifier/apd/452-bcfe/gaming

    I didnt look into it fully, but looks like you buy this for 200 (maybe find it cheaper elsewhere or used), then buy whatever graphics card you want for it
    Reply to hdmark
  3. Barty1884 said:
    The GTX 745 is an OEM card, so it's a little tough to judge where it 'sits' performance-wise (and therefore, what would be a worthwhile upgrade) but, from what I can find/judge/guess, it sits somewhere in the GT730-GT740 space.

    Looking at a couple of videos, there appears to be a decent amount of physical space for a GPU:
    https://www.youtube.com/watch?v=2dpa4vb0PW8

    But the power options are obviously a stumbling block.

    The GTX745 is a ~55W TDP card. Anything worthwhile upgrading is going to be a minimum 75W TDP, if not more (a GTX 1060, for example is 120W).

    It does appear to use standard PSU connectors though - so a replacement PSU is an option BUT there's nowhere to put a "normal" PSU in there - so you'd need to migrate to a new case.
    https://www.youtube.com/watch?v=-RQ-IW8fIqs


    I may just do what you suggested and get a case for it. I hadn't thought of that, and it seems that the dell 330w PSU costs just as much as a new case AND 450w PSU or more. Thanks!
    Reply to sam_tessari
  4. hdmark said:
    Not sure if you looked into it, but dell has the alienware graphics amplifier:
    http://www.dell.com/en-us/shop/alienware-graphics-amplifier/apd/452-bcfe/gaming

    I didnt look into it fully, but looks like you buy this for 200 (maybe find it cheaper elsewhere or used), then buy whatever graphics card you want for it


    Thank you for the swift response. I actually hadn't thought of that, but I'm afraid it may be a waste of money because I plan on upgrading my computer in the future. Thank you though!
    Reply to sam_tessari
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