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Deliding a 4770K (Haswell). Improving temperatures and maximizing overclockablity. - Page 15

post #141 of 1134
Quote:
Originally Posted by Forceman View Post


Same problem I have.  I can't get 4.5 stable at any voltage that doesn't temp throttle, but 4.4 is fine at 1.32V.  I tried a lot of combinations of VRIN, VIOD and VIOA with no success.

And all this time I've been thinking I have a horrible chip...
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post #142 of 1134
Quote:
Originally Posted by Cyclops View Post

Hahahahaha. Goes to 100C across all cores instantly when I use anywhere from 8 to 32K FFT length at 1.4 volts. Still got some tuning to do.
LOL 100C means that your processor is drawing 166.5 watt
post #143 of 1134
Quote:
Originally Posted by brucethemoose View Post

2 years of progress, process improvements, and tweaking since sandy bridge. Yet average overclocks are getting WORSE, even after getting temps under control.

So sad... sandy at 4.8 is nearly the same as haswell at 4.5 2 years later.
get an Intel rig first then you can decide the performance gap... wink.gif
just saying.
post #144 of 1134
Quote:
Originally Posted by FtW 420 View Post

For the correct vcore in cpu-z http://forums.videocardz.com/topic/503-cpu-z-1642-beta/
Hopefully they are not reading the VID from MSR_PERF_STATUS because that may report an Incorrect Core Voltage (see Intel HSD31)

Problem: "The core operating voltage can be determined by dividing MSR_PERF_STATUS MSR (198H) bits [47:32] by 2^13. However, due to this erratum, this calculation may report half the actual core voltage."

Implication: "The core operating voltage may be reported incorrectly."
post #145 of 1134
Quote:
Originally Posted by Cyclops View Post

It's not stable at 4.5 GHz no matter how much voltage I feed it. It's a horribly inconsistent architecture.

Quote:
Originally Posted by Forceman View Post


Same problem I have.  I can't get 4.5 stable at any voltage that doesn't temp throttle, but 4.4 is fine at 1.32V.  I tried a lot of combinations of VRIN, VIOD and VIOA with no success.


This saddens me. Well, I'll be interested to see how Haswell does with sub-ambient.
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post #146 of 1134
Quote:
Originally Posted by Forceman View Post


Same problem I have.  I can't get 4.5 stable at any voltage that doesn't temp throttle, but 4.4 is fine at 1.32V.  I tried a lot of combinations of VRIN, VIOD and VIOA with no success.
Is the back of your motherboard, at around the CPU spot, getting hot?

p.s. I have a fan there.
post #147 of 1134
Quote:
Originally Posted by Pike View Post

Hopefully they are not reading the VID from MSR_PERF_STATUS because that may report an Incorrect Core Voltage (see Intel HSD31)

Problem: "The core operating voltage can be determined by dividing MSR_PERF_STATUS MSR (198H) bits [47:32] by 2^13. However, due to this erratum, this calculation may report half the actual core voltage."

Implication: "The core operating voltage may be reported incorrectly."

It is showing correctly for the z87 mpower max, idle voltage reads perfectly, although under load I do see about .02V of vrise on the DMM that cpu-z isn't picking up.
    
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post #148 of 1134
wow if it turns out haswell has this hard of a time getting over 4.5, ill go with x79 for sure.
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post #149 of 1134
If the instructions for Haswell have been optimized then possibly 4.5 on Haswell could be better than a higher speed on previous gen's we just need some benchmark comparisons to decide if 4.5 is any good or not.

Also have you done any overclocking with the BCLK or just using the multiplier?
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post #150 of 1134
Quote:
Originally Posted by Cyclops View Post

Untrue.

Sandy at 4.8 is about the same as Haswell at 4.2-4.25.

I can't post pictures for some reason, just sits there but can you run Cinebench and post results?
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