Want to use speedstep with asus p8p67 pro but problems abound

Changing 'SpeedStep' from anything from x16~x34 isn't possible other than to turn it off which I really don't recommend. If you Disable SpeedStep/EIST C-States the CPU will run at 4.8GHz all of the time. There's Pros & Cons, but IMO the Cons win so I try to have my OC's with all energy savings Enabled.

Your CPU will run 'hotter' Disabling SpeedStep/EIST C-States. Further, IMO a 4.8GHz is too much for CM 212 EVO, and it best to keep your vCore <1.40v if not 1.35v~1.38v with a simple HSF.

Ok thanks, wasn't sure if it was possible to get the stock speed of 1600mhz higher. I had speedstep disabled running at 4.8ghz just fine for a few months, not one blue screen. 38c idle and 50-60c heavy gaming but did not reach high temps running prime95. I also have the vCore a little higher like you said rather than auto, not by much, but just to insure stability.

I also have a push and pull fan config on the 212 evo, if that is what you meant by HSF (heat sink fan)? Also I'm in an antec 900 with both the top 220mm blowing at full and the back 120mm , and have 2 custom high RPM fans blowing air in through the front. Haven't had any problem with temps even running with speed step disabled so it's interesting you bring that up.

If my temps are fine and I can run a 24 hour prime95 test and not fail and not BSOD, what would be other issues I would face? Just shortened life of the CPU? I do plan to just use speedstep and keep it at 4800mhz while 3d gaming and such, only wish I could make that 1600mhz 2800mhz at least. Too bad you can't.

Thanks for the info.  

One more question, why keep the Vcore higher if everything is running cool and I'm not having problems? I know it's stable, so just wondering. I was thinking of just keeping the vcore at auto when I use speedstep, since the turbo will kick up the Vcore when needed. I will do a stress test to make sure, but I actually did a several hour short one and it was fine.

I'm not suggesting you increase you vCore, I was suggesting you 'limit' your vCore. If you're stable at a lower vCore, you didn't list any, then kudos for you! I can't imagine vCore = Auto and you're stable @ 4.8GHz; I'd love to see that CPU-z with Prime95/AIDA64 in the background after 30 minutes even.

Remember, getting a CPU-z validation means zip if you cannot sustain the CPU @ 100% for less than several hours. Having a BSOD in the middle of something isn't any fun.

As an alternative, you can leave 'SpeedStep' Enabled and instead of 'All Core' @ x48 you can try e.g. cores 1-2 @ x44 and cores 3-4 @ x48.

I increased the vcore when not using speedstep and was at 4.8ghz. It wasn't in auto. I understand about stress testing , as I replied.

I have it on auto right now with speedstep enabled, and I've had it pass stress tests for a few hrs with the increased Vcore given me by the turbo boost in the past.

But I will of course do another stress test, and see if the Vcore needs to be bumped up, which I'm sure it may need to be. But like I said, I've not had a single BSOD and have good temps.

I have overclocked several machines and understand the basics, I just didn't know whether the stock 1600mhz using speedstep could be changed , I heard somewhere it could. That would be fantastic, but alas, I guess it's not to be.

I'll most likely either use speedstep and test on auto Vcore in prime95 to see what happens and gradually increase as I always do. I have had great luck with OCing with this board/chip/mem and cooler. So who knows?

If it will pass 100% for 12 hours and has cool enough temps under full load, and idle, that is fine with me. We shall see.

Thank you for your help.

Thank you! I actually had permanently set the CPU to 4800mhz, and decided to clock down to 4600mhz after some benchmarking, just didn't seem worth pushing it that far with the programs I use. Now I can just use speedstep and get that same speed but keep it around 2600mhz when in non 3d mode or not that much power needed.

I had actually been giving the speedstep a try for around 2 weeks before even reading I could do this, and it never gave me problems really. I just felt like it wasn't "stable" or it would jump around too easily. Easy to forget CPUs are way faster than the diode can detect. Now that I can idle at a higher mhz makes the speedstep a much easier sell  

Best answer selected by pattamus.

This topic has been closed by Nikorr