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Please help with Asus Crosshair V Formula

Sedius
Level 7
Good day. I'm not a natural english speaker, so please bear with me if I wrote something strange.
I´m building my first real gamer PC. About a year ago, I make a PC with a low-budget Gigabyte motherboard, a Athlon II X3, two Kingston hyper X (1333 4g) RAMs and a HD 6870 XFX. This pc runs fine, I have played skyrim (moded) dead space and some other games on high with it, but I wanted more.
So I bought a Asus Crosshair V Formula, a FX 8350 black edition (bios 1703), two Corsair Vengeance (1600 8g) and was hoping to use the same HD 6870, at least for some time. I have used an SSD ADATA S510 (120g sata 6). The PSU is a XCASE (800 watts atx)

The installation of the OS runs fine, I've even installed avast and some programs. Finally I installed skyrim, the game runs, but after a short time (about 2-3 min.) the motherboard beeps (one, short) and the PC crashes.
I´ve tried with other games, with the same results. Even worst, the same happens with videos (after a short time, the PC beeps (one, short), freezes, then crashes)

So far I've tried with diferent RAM, update the catalyst for the HD 6870, tweaking the fan speed, changing the video card from one port to another, with the same results.

I have a pretty normal case, with 4 fans. Nothing is overclocked or anything.

It's my first gaming PC, and I was very happy with it... can someone help me please?
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13 REPLIES 13

Granger
Level 10
You don't need 1300W if you just want to add another 6870, mine rig was running fine with a 5 year old Corsair HX750W, I bought it because it was a great deal the moment I bought it (195€ when it was between 270€ and 299€ elsewhere)

But to be on the safe side (and a future proof) getting anything over 850W gold from companies like Corsair, Coolermaster, Enermax, Antec, Seasonic.... would be good, 1000W + even better.

Sedius
Level 7
well... the Cooler Master Silent Pro Hybrid 1300W Power Supply is around 300 bucks in amazon...
A pair of 6870 would be good? Which PSU would be good for that crossfire?
I'm interesed in a GTX 580 or a GTX 680.

Chino
Level 15
The odds of you finding a new HD6870 is pretty slim considering that it's an older card. I wouldn't bother getting another one for crossfire to be honest.

Granger
Level 10
Works great Chino, and it is still possible to get the 6870's new (seen Sapphire and Asus on Amazon US for under $170)

I had my two 6870's running with a Corsair HX750W before with no issues, but I think it would be preferable to go for a 850W or more to be on the safe side.

BF3 everything maxed and getting between 40 and 60 FPS, so I think my cards are staying in until: either I win a nice big card like an Ares II (hint hint Asus 😉 )or AMD bring out their next gen cards 😉