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GIGABYTE Z77X Owners/Discussion/Information/Support Thread and Club (UD5H, UD3H, D3H, and ALL) - Page 239

post #2381 of 6656
Dont use memtest 86+. Instead use hci memtest. http://hcidesign.com/memtest/

Much better. I even bought the pro version, but you dont need to buy it. I was having failures on prime (rounding) and memtest86+ was not giving any problems. Then i used hci memtest and it revelead two faulty memory sticks out of 4. I RMA them and get new ones. Now everything works...

Memtest86+ really isn't the best tool to test your memory...
post #2382 of 6656
Hello,

I just installed a system with a z77x-d3h (bios F9) and a 3570k, cooled by a noctua u12p.

Everything run fine, but I was getting strange temps while running prime95, above what I expected. I finally discovered that my 4 cores where running at 3.8Ghz / 1.188V. 38 multiplier on 4 cores is not the normal turbo behavior, and the vcore is pretty high.

In the bios all turbo settings are by default. Next to the buttons (set to "auto") are the supposed default values :

1 core 38
2 core 37
3 core 36
4 core 36

If I change the turbo values from "auto" to the same values that are indicated (38,37,36,36), the turbo boost seems to behave normally : prime95 run at 3.6Ghz / 1.140V, and my temps are 7 degrees below.

I don't understand what's going on, is this some sort of trick to get better results out of benchmarks ?


I hope I made myself clear, english is not my native language smile.gif

Thanks
Edited by Telchar - 6/27/12 at 4:09am
post #2383 of 6656
I'm running bios version F8 pm my Z77X-UD5H and can not seem to get any devices connected to the internal USB3.0 headers F_USB30_2 and F_USB30_3 to work. I appear to get power but nothing else. The devices work when connected to F_USB30_1 but not the other two internal headers. The rear USB3.0 ports all work fine. I've tried using the dual bios switch to run my original F5 bios but this doesn't work either. I believe these intenal headers run off the VIA VL810 controller located adjacent to them, while the other header runs from the Z77 chipset. Has anyone else had any issues with the internal headers?
Edited by kesawi - 6/27/12 at 5:44am
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post #2384 of 6656
Quote:
Originally Posted by kesawi View Post

I'm running bios version F8 pm my Z77X-UD5H and can not seem to get any devices connected to the internal USB3.0 headers F_USB30_2 and F_USB30_3 to work. I appear to get power but nothing else. The devices work when connected to F_USB30_1 but not the other two internal headers. The rear USB3.0 ports all work fine. I've tried using the dual bios switch to run my original F5 bios but this doesn't work either. I believe these intenal headers run off the VIA VL810 controller located adjacent to them, while the other header runs from the Z77 chipset. Has anyone else had any issues with the internal headers?

Please do not cross post or at least include a link to the other post.
post #2385 of 6656
Hi guys,
could someone please tell me how far down can a UD5H downvolt an Ivy Bridge CPU (core i5 3570K, to be specific)?
I mean, what is the lowest voltage allowed by the board and, in someone tried, the lowest voltage allowed by the 3570K.
I am planning to use my rig undervolted and underclocked between mild overclocks and wanted to know if I can lower temperatures in that way.
(Obviously only when reading, writing and thinking in front of the screen).

tnx
post #2386 of 6656
I don't think theres any specific low voltage. Esch board ans cpu will be diffrent. The only way to know is test it out for yourself.
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post #2387 of 6656
Quote:
Originally Posted by Sredni Vashtar View Post

Hi guys,
could someone please tell me how far down can a UD5H downvolt an Ivy Bridge CPU (core i5 3570K, to be specific)?
I mean, what is the lowest voltage allowed by the board and, in someone tried, the lowest voltage allowed by the 3570K.
I am planning to use my rig undervolted and underclocked between mild overclocks and wanted to know if I can lower temperatures in that way.
(Obviously only when reading, writing and thinking in front of the screen).
tnx

I dont think there's a real benefit on doing that. On idle or with low usage the cpu defaults to 1.6ghz. The cpu is cold. The motherboard of z77 and PCH is the real culprit for the case of getting hot. But i dont think that lowering the voltage will make much such a difference...
post #2388 of 6656
I read this
http://www.anandtech.com/show/5763/undervolting-and-overclocking-on-ivy-bridge
and I know people who undervolted (slightly) their Sandies and measured a few watts less with a wattmeter (perhaps the vrms on the mobo require less power, I don't know). My idea is to get the greener rig possible while under light load, but still be able to overclock when I need computing power.

My question was about the voltage settings in the Bios/UEFI: what is the minimum voltage setting or offset allowed by the UD5H? I've read it no longer has drop down menus, it just lets you enter the values. And I did not find an answer in the manual.
To clarify I don't have the board yet, I'm 95% positive I'll buy one (even if I don't like getting the 1.0 rev but I guess it will be months before we see a new revision...), and yet the undervolting capability is one of the things I want.
I also understand that you cannot run a cpu at 0.5V, nor at 0.8 V, but I believe that certain boards allows for stable undervolting while others don't - for example, I read on these very pages that sometimes ud5h owners have to rise the voltage more than expected to have a stable overclock, but if I'm not mistaken a slight overvoltage seems to be necessary even at stock . Perhaps the ud5h won't let IB work at less than its nominal voltage? That's why I asked
Edited by Sredni Vashtar - 6/27/12 at 9:17am
post #2389 of 6656
Damn USB 3.0. I thought I had definitely identified my Corsair case's front panel to be causing my issues and I still believe that's a problem but I just tried plugging my USB HDD directly into the Gigabyte bracket which is connected to the Intel internal header and it's telling me the device can perform faster if I connect it to a USB 3.0 port. I have the latest Intel USB 3.0 driver installed. The back ports work fine. When I plug the Corsair front panel into the back ports of the motherboard there is no recognition in Windows of the HDD being connected at all. So there's something wrong with the front panel too. I'm about to just give up on the front panel ports and internal headers, and just use the back ports. Really frustrating, I have these features and being able to use them would be nice.
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post #2390 of 6656
Quote:
Originally Posted by Sin0822 View Post

Run memtest 86+ through DOS, if AIDA64 EE is giving you errors in its stress test on the cache then there is something wrong with your CPU OC or memory perhaps.

Hi Sin,

I ran memtest 86+ through DOS with one of those bootcds already. Ran it overnight with multiple passes and no errors which leads me to believe my memory is ok. I am however, quite suspicious about the Aida stress tests because the reults are flaky and I can't replicate it. It fails the Aida tests randomly... sometimes its just perfect, no problems. I loaded F9d now and will keep it for a week to see how things goes. Could you give me an idea of what CPU OC I might be doing wrong to cause stress test cache to fail? I suspect it could be my OC since I set everything in the BIOS to auto.. should I specify my Vcore and not let my MB choose? I don't like doing that cuz I want my CPU to idle at low Voltages and temps.. setting it 1.14V I assume will keep it hot and perhaps my CPU will suffer from Voltage degradation?? imo I'm still a noob frown.gif advices?

p/s thanks for the RAID AHCI warning.. I'll be very careful from now on..
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