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post #2051 of 9343
Quote:
Originally Posted by turrican9 View Post
With CPU Spread Spectrum at AUTO it has not dropped below 1.360v with the 1704 bios yet.

My test results - 4.5GHz, LLC Ultra High, Offset + 0.020

1606 bios: CPU Spread Spectrum Disabled: Vcore - 1.352v - 1.376v

1606 bios: CPU Spread Spectrum Enabled/Auto: Vcore - 1.360v - 1.376v

1704 bios: CPU Spread Spectrum Disabled: Vcore - 1.352v - 1.376v

1704 bios: CPU Spread Spectrum Enabled/Auto: Vcore - 1.352v - 1.376v

1850 bios: CPU Spread Spectrum Disabled: Vcore - 1.352v - 1.376v

1850 bios: CPU Spread Spectrum Enabled/Auto: Vcore - 1.352v - 1.376v

So it seems it drops to 1.352 no matter what CPU Spread Spectrum setting on the 1850 bios. For me this is the difference between a 12 hours + Custom Blend 6000MB stable or not. Because it crashed with the 1850 bios on a Blend run, where it previously had been stable. That is how I found this...

Update: It fell to 1.352 just now, using the 1704 bios. So it seems the 1606 bios caused it to not drop below 1.360v when Spread Spectrum was at AUTO. This was the bios I had done my 12 hours + Blend runs on earlier.
So are you going to flash to 1606 and test again? If not, then you should stop and get a device for measuring the voltage without using software. Otherwise you won't know for sure if there is any difference. Especially since the software doesn't measure the Vcore accurately. I like to think of software monitoring as a good(enough) guess. But i wouldn't trust it for a scientific test.

Edit: I see you already flashed to 1606 and are testing now. Continue with that and let us know your results, but if you want to take it further i recommend listening to the above.
post #2052 of 9343
Quote:
Originally Posted by nawon72 View Post
So are you going to flash to 1606 and test again? If not, then you should stop and get a device for measuring the voltage without using software. Otherwise you won't know for sure if there is any difference. Especially since the software doesn't measure the Vcore accurately. I like to think of software monitoring as a good(enough) guess. But i wouldn't trust it for a scientific test.

Edit: I see you already flashed to 1606 and are testing now. Continue with that and let us know your results, but if you want to take it further i recommend listening to the above.
1606 bios is not dropping below 1.360v. Prime95 Blend has gone much longer than 1704 and 1850 did, without dropping below 1.360v. And as I've said, I have a 12 hours + Blend snapshot showing it did never drop below 1.360v when using the 1606 bios.

And I don't need to meassure, because it is proof enough that Blend failed when using the 1850 bios at the same settings as with 1606. It failed because the Vcore dropped below 1.360v. So it seems the 1606 bios is the better one when it comes to a more stable Vcore. CPU Spread Spectrum needs to be at AUTO or Enabled though.

I would advice you to test this with the 1606 bios yourself. You might be in for a good surprise

The best way to test this is to use Blend Custom and 1 minute per FFT. The switching between different FFT sizes causes the variations in Load Voltage. And bigger Vdroop will make it harder to be stable. The lesser fluctuation, the better. And the 1606 bios seems like the better one in this matter.
Edited by turrican9 - 7/19/11 at 8:05am
    
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post #2053 of 9343
I'm still on 1606
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post #2054 of 9343
It has been going for 30 minutes with Blend custom 1 minute per FFT and still not dropped below 1.360v. With 1704 and 1850 it would drop a little bit after 10 minutes, or sooner. And as I've said, I have proofs from earlier 12 hours + snapshots.

And again, CPU Spread Spectrum needs to be at AUTO or Enabled.

If I remember correctly, the 1502 bios was the same as the 1606 in this matter. Other changes I noticed when I upgraded to 1704 and 1850 was:
  • I needed to disable C3/C6 when using Offset Vcore, to avoid Idle BSOD.
  • The CPU would downclock the moment I entered Windows. 1502 and 1606 took a while before it downclocked.
  • Using the Silent CPU Fan Profile in 1704 and 1850 lowered the Fan RPM under load VS 1606 in Silent Mode.

Edited by turrican9 - 7/19/11 at 8:14am
    
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post #2055 of 9343
Quote:
Originally Posted by Alex132 View Post
I'm still on 1606
I was on 1606 2 days ago... Im not sure if flashing to 1606 again is worth the slightly more stable Vcore. Doesn't 1704 have other improvements?

Off topic - I predict 1,000,000 threads at 10am July 21st PST, anyone else want to make a guess?
Edited by nawon72 - 7/19/11 at 8:17am
post #2056 of 9343
Quote:
Originally Posted by nawon72 View Post
I was on 1606 2 days ago... Im not sure if flashing to 1606 again is worth the slightly more stable Vcore. Doesn't 1704 have other improvements?
Look above. For me, having a more stable Vcore is critical. I will stay with 1606 from now on.
    
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post #2057 of 9343
Quote:
Originally Posted by turrican9 View Post
Look above. For me, having a more stable Vcore is critical. I will stay with 1606 from now on.
I think ASUS will have a new BIOS within the month, based on their release dates for the Beta BIOS's. Ill be waiting for it, unless it fails hard.
Quote:
Originally Posted by turrican9 View Post
  • I needed to disable C3/C6 when using Offset Vcore, to avoid Idle BSOD.
  • The CPU would downclock the moment I entered Windows. 1502 and 1606 took a while before it downclocked.
So using 1606 and 1502, you enabled C3 and C6 and didn't idle BSOD with the same OC as 1704 and 1802(also, what clock)? If that's the case, then which BIOS do you recommend, 1606 or 1502?

What do you mean by downclock? Do you mean EIST kicks in?
Edited by nawon72 - 7/19/11 at 8:27am
post #2058 of 9343
I fold on this so, yeah stability means a lot to me
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post #2059 of 9343
Here is a picture from the Sandy Stable Club of a 4.7GHz run I did. Here I used the 1704 bios. And in HWiNFO one can see the Vcore fluctuations. At that time I didn't know the 1606 bios fluctuated the Vcore less. So I will try 4.7GHz now, with the excact same settings, only with the 1606 bios now. I'm sure I will get the same results as I do at 4.5GHz. Less fluctuation.

    
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post #2060 of 9343
So far I'm getting 1.440v - 1.456v (one minute per FFT) with the 1606 bios VS the picture using the 1704 bios at the same settings: 1.432v - 1.464v.

My guess is, it will stay this way. As proven earlier, more stable Vcore with the 1606 (Probably identical to the 1502 bios) VS 1704 and 1850.
    
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