ASUS P8P67 Pro/Evo/Deluxe OC discussion thread

[st0ned]

I didn't took linx screenshot bue I might do it in my search for a lower vCore.

This are 25linx runs stable number:

1600 9-9-9-24 1.5 [default]

1866 10-11-10-28 1.55v



1866 9-11-9-26 1.65v

I dont have pics

2133 10-12-26 1.65v

I'll post pics as soon as I end up testing


1.65v seems pretty safe to me, or ?

In SB so far, frequency >>>> timings

[Sam_oslo]

SB doesn't care much about the CL, you can loosen up timings without loosing much. It's more about brute speed.

1866 CL10 1.55v is a really good start for such a cheap RAM. SB has introduced such a great IMC-improvement that, that's a total overkill for 24/7 use, and all desktop applications already.
If you want to test more, see how far they can go with 1.50v.
If they can do 2133 under 1.55v, with whatever timing, just loosen up as much as you can, then it would be really great.

You can bench higher, but I would keep it under 1.55v, rather at 1.50v, for 24/7. Until we get to know more about the long term effect.

[Pacha]

Is it inevitable to have 1600MHz idle freq or does disabling Speedstep and all C-states etc let you run the CPU at max freq when idling?

[Sam_oslo]

Is it inevitable to have 1600MHz idle freq or does disabling Speedstep and all C-states etc let you run the CPU at max freq when idling?

You can disable them, and then it will idle at turbo-speed, but you will get a bit more power-usage and a few 'C more heat at idle.
I'm not sure how big the power-usage is in reality, but I've been getting 32w vs 8w at @4.5Ghz 1.27, both according to real-temp.

[Pacha]

You can disable them, and then it will idle at turbo-speed, but you will get a bit more power-usage and a few 'C more heat at idle.
I'm not sure how big the power-usage is in reality, but I've been getting 32w vs 8w at @4.5Ghz 1.27, both according to real-temp.

Ok thanks.
What are the idling temps for you at 1.6GHz and 4.5GHz?
BTW, how much time does the chip stay at full speed when it's not stressed anymore?

Is there no stability issue with constant changes in freq and voltage like this?
Does the chip goes back to lower voltage at 1.6GHz?

[Sam_oslo]

Ok thanks.
What are the idling temps for you at 1.6GHz and 4.5GHz?
BTW, how much time does the chip stay at full speed when it's not stressed anymore?

Is there no stability issue with constant changes in freq and voltage like this?
Does the chip goes back to lower voltage at 1.6GHz?

Just 2-3 degrees different, and all my case-fans spins at ~60% that can add to it, but temp-difference is not a big deal. I'm more concern to know about the real different in power-usage, and mentioned temp because it indicates power-usage, but the temp in not a big deal by itself.

Cores are very responsive, they jump up and down real-time. I'm using manual vCore, with LLC=Ultra, and the it's 1.288v/1.272v (Idle/Load). No stability issue at all.

If you want low voltage at idle, then you have to use oftest mode, but I personally haven't used it, and don't know much about it.

[bokoy]

I´m trying to find linx with latest linpack libraries, but no luck, just found 0.6.4 that already had. Can you please tell me were to find it??
Thanks

[Pacha]

Guessing some hundred ms before freq. drops.

Havent had stability issues with 5ghz oc and idle at 1,6mhz (manual volt setting).

Chip doesnt drop volt unless you use offset mode for voltage.

Just 2-3 degrees different, and all my case-fans spins at ~60% that can add to it, but temp-difference is not a big deal. I'm more concern to know about the real different in power-usage, and mentioned temp because it indicates power-usage, but the temp in not a big deal by itself.

Cores are very responsive, they jump up and down real-time. I'm using manual vCore, with LLC=Ultra, and the it's 1.288v/1.272v (Idle/Load). No stability issue at all.

If you want low voltage at idle, then you have to use oftest mode, but I personally haven't used it, and don't know much about it.

Thank you guys, that's interesting.

I'm not into calibrated vdroop for idling, "normal" vcore all the time is fine for me.
However, wouldn't suitable vcore for full freq be a little too much for 1.6GHz?
I never thought much about if it would impact anything or not if voltage is high at low freq.

[Sam_oslo]

Ok thanks.
What are the idling temps for you at 1.6GHz and 4.5GHz?
BTW, how much time does the chip stay at full speed when it's not stressed anymore?

Is there no stability issue with constant changes in freq and voltage like this?
Does the chip goes back to lower voltage at 1.6GHz?

I've tested a bit more.
If you leave the C-state's at default/auto (with new BIOSes, 1302+), then you can choose between 1600MHz or Turbo-speed in w7 by changing the Power Options.
The good part, You can change to High Performance or Balanced, anytime . In this way you can experiment and see what works best for you too.
This is with BIOS 1305, and all C-state's on auto/default:

Power Option= Balanced, it Idles @1600MHz and uses ~10w, even with manual vCore=1.28v Idle:



Power Option= High performance, it Idles @4.5GHz and uses ~31w, with the same vCore:

[Praz]

The good part, You can change to High Performance or Balanced, anytime .

The M4E allows this also.