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[Various] Intel Haswell Reviews - Page 60

post #591 of 858
Quote:
Originally Posted by Buttnose View Post

Whats this about? Haswell overshoots vcore by .1+ when stresstesting?
I'm pretty sure most of the software out there still inaccurately reads the voltages. We need to wait a bit.
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post #592 of 858
Quote:
Originally Posted by ohhgourami View Post

Hammer and vice method. Go look on the Intel CPU subsection for the "Delid without razor blade" thread.

When i first heard of de-lidding a few months back... i thought "omg, that cant be a good idea"... flash forward and now i'm thinking if/when i finally get a new cpu, de-lidding is probably my best bet. Unless i get a SB-E of some kind (3930K). I'll have to look into the roadmap for LGA 2011, IB-E will use that, but what about beyond?

Does anybody know if IB-E will have soldered IHS's or TIM across too large of a gap like IB and Haswell retail chips have?
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post #593 of 858
Quote:
Originally Posted by L36 View Post

I'm pretty sure most of the software out there still inaccurately reads the voltages. We need to wait a bit.

Not so inaccurate when, aside from reporting voltage, it also throttles your CPU, which can be seen with your bare eyes.That info comes directly from ASUS. You're placing the blame on the wrong place, since that is a Haswell "feature", not a monkey coding CPU-Z/HWinfo/HWmonitor. biggrin.gif
Edited by Nonehxc - 6/3/13 at 7:29pm
    
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post #594 of 858
Quote:
Originally Posted by Buttnose View Post


Whats this about? Haswell overshoots vcore by .1+ when stresstesting?


The adaptive VID feature will increase the VID based on the type of load, and Prime appears to cause it to spike.  Using a manual fixed voltage avoids the problem, but it's not clear whether it only affects adaptive offset or if it also impact the normal style.  That Asus guide kind of says it both ways.

post #595 of 858
Quote:
Originally Posted by xoleras View Post

I don't agree that it's 1-5%. It is more on average, I can link some benchmarks later. FYI, a Haswell at 4.8GHz gets nearly 10 points on cinebench 11.5. That is FAR better than Ivy Bridge @ 4.8.

Disable boost, and run this benchmark: http://www.overclock.net/forum/newestpost/1392721 at the same frequency with both CPUs. (You must run pac4C.cmd,, then pack8C.cmd. Or disable hyperthreading and run only pack4C.cmd)

It outputs results in: time in ns followed by a hash. Lower number is better of course. You can compare results to AMD results from that thread. (Intel should be better per cycle in this benchmark however.)
Quote:
Originally Posted by Nonehxc View Post

Maybe he didn't knew some essential things about Haswell, maybe he did. Sure thing is: Haswell affects Prime in an essential way. Using Prime with AVX, Haswell ups the voltage and then screws with your OC, but instead of just BSODing, it downclocks-throttles in its automated and mobile way. biggrin.gif

Yes Intel is cheating. It doesn't have power to run AVX2 on normal voltage, thus they up the voltage, and hope user will not use AVX2 long enough to cause degradation. Of course upping voltage of an overclocked overvolted CPU is suicide.
Edited by Raghar - 6/3/13 at 7:48pm
post #596 of 858
Quote:
Originally Posted by Forceman View Post


The adaptive VID feature will increase the VID based on the type of load, and Prime appears to cause it to spike.  Using a manual fixed voltage avoids the problem, but it's not clear whether it only affects adaptive offset or if it also impact the normal style.  That Asus guide kind of says it both ways.

Adaptive VID sounds very strange, whats the purpose of it spiking up? I can understand it adding vcore to stabilize the turboboost OC - but otherwise why? Not sure what you mean by adaptive offset/normal style. Seems like I need to read the Asus guide tommorow.
post #597 of 858
Quote:
Originally Posted by Buttnose View Post

Adaptive VID sounds very strange, whats the purpose of it spiking up? I can understand it adding vcore to stabilize the turboboost OC - but otherwise why? Not sure what you mean by adaptive offset/normal style. Seems like I need to read the Asus guide tommorow.

My understanding is that fixed is fixed, regular offset is what we now think of as offset (where it adds the same offset all the time) and adaptive only applies the offset voltage once you exceed stock clocks. So adaptive sounds like the best, where it is stock voltage at stock clocks and then ramps up based on the offset when overclocked, except that it seems like it also does some kind of interpretive adjustment based on the load. So I guess time will tell what works best going forward - but Asus says not to use Prime95 for stability testing Haswell because of that "feature" .
post #598 of 858
I would stick to "offset" or "override"... at least until things get worked out with new retail samples... heard of some random deaths recently on very low OC settings and volts. Likely due to spiking from "adaptive" mode... cannot confirm yet though.
post #599 of 858
Quote:
Originally Posted by michael-ocn View Post

When i first heard of de-lidding a few months back... i thought "omg, that cant be a good idea"... flash forward and now i'm thinking if/when i finally get a new cpu, de-lidding is probably my best bet. Unless i get a SB-E of some kind (3930K). I'll have to look into the roadmap for LGA 2011, IB-E will use that, but what about beyond?

Does anybody know if IB-E will have soldered IHS's or TIM across too large of a gap like IB and Haswell retail chips have?

Intel is more or less forced to use solder on -e chips because of the excess heat 2 more cores add. Not only this but the cost warrants only the best option available.

Though to be honest, I wouldn't have a problem due liding if I had to, but it has been shown that solder = de lid performance (yes, some crazy people have heated the spreader enough to melt the solder and delid them. DO NOT DO THIS!)
     
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post #600 of 858
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Edited by The Robot - 6/3/13 at 9:21pm
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