BF4 GPU Usage drops SLI

1) I assume you've made sure that the integrated intel CPU is disabled in BIOS
2) If you have PCI-e GEN3 enabled in BIOS, try running with it disabled

 

1. is disabled
2. i will try, but after 2 rounds bf4 with the new SLI-Bridge no Probs

 

Good, hope that is the solution. Did you check the connectors on your old bridge for dust or corrosion?

 

Seem's to be OK the old SLI-Bridge but its very wobbly. The new one fits perfecttly!

Tomorrow i have the new PSU and than i do final test's it's enough for today ^^

I made a good Step forward to my Problem Solution

 

x2 670s and an i7 ivy bridge need how much?

not optimal in the least, at 1080 no aa I also seen bf4 peek it's head over the 2gb barrier.

 

But Cpus and Gpus can under perform due to lack of power. I have seen this one thread where this one guy had a cheap generic PSU and an AMD Fx 6300 I think it was and the guy was complaining that his CPU was not performing very well and we tried to tell him that it was his PSU causing his problem.

 

No, they cannot. Frequency is dependent on C state, current on core rails and temperature. Voltage regulators dont give any feedback to cpu about input voltage.

 

Its the opposite. We have absolute control about it. Precise voltage control is critical to cpu stability. We all know here what difference is 1.150V abd 1.200V can do about stability, temperature and top core frequency when OC.

Believe me, there is no strange magic about it. Hundreds of ampers is interesting engineering problem to control by cheap components and low temperatures, but this problem is long solved.

 

But no matter how you shake it 550w is not enough for 2 670 and OC 3770 .
Figure the 670 will pull around 200-225w each and CPU and MB, HD ,fans etc another 100w .
So add it up and your right on edge of PSU output .
It not good to run them so close to max output , efficiency is way down and heat goes up most times .

Lucky thing is under normally app you never tax "both" CPU and GPU at same time .
I wonder what would happen if prime95 is running and then run furmark , that probably could put it over or make it unstable .

I generally try to pick PSU were max load is only 60-75% of PSU output (closer to 60%) .

 

^^ This. Because even if you have an 80 bronze or Gold or Platinum PSUs I agree that 550w is not enough for SLI plus an OC'ed CPU.

 

Of course its on its limits. But I have 2xgtx670 OC, i7-3770 @4.1 @1.200V, 3xHDD, SSD, 2xoptical, 5 fans incl. 3x180mmx35mm (Silverstone Fortress ft-02), and biggest power consumption I have measured (remote display for measuring on wall sockets Solight DT23) was 550W, wich is cca 500W of component draw in Metro2033.
So if the psu holds its voltage, it should work. Gold or platinum 650W would be better option of course.

 

After PSU and SLI-Bridge Change it run smooth, as it should

And the Temps of the Cards are better, with the new PSU^^

Thx all for your Help !

 

Good to hear, enjoy your gaming :thumbup:

 

Nice buddy! Enjoy, dont forget to update your sig!

 

Good for you op.