For $900, I'd just build a new PC.

What are your current specs?

CPU- AMD FX-6300 6 core 3.5 GHz
GPU- EVGA GTX 650 1GB
MOBO- Gigabyte GA 78LMT USB3
RAM- 8GB Kingston HyperX Blu
PSU- Corsair CX750M
HDD- Western Digital Blue 1TB

I was going to use the left over parts and extra parts I already have to give to my mom. She needs an upgrade, she using like a 7 year old windows Vista walmart PC

I'd just give your whole PC to your mom then. For the amount you're spending, a new PC would be best.

I know it would,that was my original plan, but I spent a little to much on other things recently so I could really only do a solid upgrade. You helped me out with a build, I'm leaving to college and I picked out the components I'd really like to upgrade and use the extra items to build my mom a working rig.

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Re-use your HDD, and you can give the rest to mumsy. She'll need to sort storage out herself, by re-using an old HDD or something but that shouldn't be an issue. Or just pick up a cheap HDD for her to use.

If you want, spend the extra $60 on the 6600k for a fully unlocked chip, but you can OC the BCLK on locked Skylake chips anyway so you can OC the 6500. Nice little black/white rig(assuming that's what you like, since you were looking at a Krait mobo). Nice SSD for OS and a few other things. That Capstone 850W is a great unit, and gives you XFire support so you can easily add a 2nd 390 at any point.

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Pretty much the same, but 970 with SLI support instead of the 390. You get the Krait mobo this way(need it for SLI support), but due to it costing more, and the 970 being more expensive, you'll need to settles for a lower quality PSU

I have an extra 400 watt PSU to use for my mom's build.I'm going to keep my 750 watt corsair for my new one. Not like she's going to be gaming or anything. She just needs a functional PC that isn't slow as hell. I also have an extra mid tower case to give her so I can keep my full tower case