**Official** GIGABYTE 333 Onboard Acceleration P55A Series - P55A-UD6/UD4P/UD3

[OC Nub]

There is a little tab that sticks out where the battery is held in, I use a small flathead screwdriver or a pen and press down on the tab. That should release the battery, just be careful.

[Sgt_Strider]

Did any of your Gigabyte motherboards came with a jumper? I find it odd that mine didn't came with one.

[devil_mcry]

on ud6 there is a switch

[radaja]

UD7 has a little button

[Sgt_Strider]

So UD3 owners got the shaft?

[radaja]

yep,thats the way they do it.little things get left out for the cheaper boards.
but the good thing with gigabyte is their lower end boards OC like champs

[ehume]

Hmm. My machine's running a test right now so I can't look, but I'd swear I put a jumper plug on my P55A-UD3P when I needed to reset it.

In the manual you can see the CLR_CMOS jumper on the diagram page. You can DL your mb's manual from Gigabyte.

[radaja]

yea i remember on my P55-UD4 it had the jumper pin too.i think?
by the way great combo deal in the FS section

[Sgt_Strider]

Hmm. My machine's running a test right now so I can't look, but I'd swear I put a jumper plug on my P55A-UD3P when I needed to reset it.

In the manual you can see the CLR_CMOS jumper on the diagram page. You can DL your mb's manual from Gigabyte.

I have the manual in front of me. I looked at it and I don't see a jumper on it or on the board. I am serious here. Did you got the jumper from elsewhere?

[Sgt_Strider]

Yes, the screwdriver did the trick and resetted the CMOS. I was able to access the BIOS and it detected everything. However, upon setting the BIOS back to where it was, the boot up process would just hang up in the Serial ATA AHCI BIOS. Someone at the Xtremeforums are telling me that it could be my SSD. He said I would need to format it in another computer and I have no idea why I would need to do that.

Gigabyte P55A-UD3 won't boot up - XtremeSystems Forums

This is what I see on the screen of my desktop as it hangs upon booting up the Serial ATA ACHI BIOS

Serial ATA AHCI BIOS, Version iSrc 1.20E
Copyright (c) 2003-2008 Intel Corporation 23
**This version supports only Hard Disk and CDROM drives **
Please wait. This will take few seconds.

Controller Bus #00, Device #1F, Function#02: 06 Ports, 03 Devices
Port-00: CDROM, ATAPI iHOS104 (this is my blu-ray reader)

So here I am back in square one. What do I do now? I'm completely puzzled by this.

[Oztepher]

That happened to me when i my harddrive died mate I would do what that guy says, try it in another pc, if it works format it and then try again in ur pc.

[Temujin]

I took a close look at my P55A-UD3. The CMOS-CLR header is about 1.5 inches up from the front panel ports. It consists of only two prongs instead of three and it doesn't have a jumper on it. All you have to do is use connect the two with the tip of a screw driver for about 5 to 10 seconds. (I'd do it twice just in case.)

And, on a side note, I had the P55A-UD6 running flawlessly with some new test memory. Even though many of the GIGABYTE P55/P55A motherboards say they support up to 2200MHz DDR3 (overclocked), this board was perfectly fine at 2400MHz.


The stuff used is the Patriot Memory Sector5 4GB 2400MHz DDR3 dual channel using the XMP profile timings 9-11-9-27 2T. Manual overclocking was a little trickier. Auto memory voltage settings (VDIMM) kept trying to boot the memory at 1.5V which is too low. Manually setting the memory voltage to 1.66V in the BIOS let me go crazy with all the CPU frequencies.

So, either way, my test platforms confirmed 2400MHz DDR3 works. You may have to update your BIOS if you encounter sporadic issues. Happy clocking!

[devil_mcry]

tnx bro

the only limit of max dram frequency, for this board, is bclk lol

over 210 is very hard to run stable, therefore max dram frequency is probably 2500mhz, i think

[Temujin]

My Bclk max (on water) has been around 215/220. But, it takes quite a bit of voltage finesse and running my CPU on the hairy edge of RMA. My test CPUs have all been pretty decent with the exception of my Core i7-875K processor. All the rest can keep up with the boards for the most part.

The fact that the fastest dual channel DDR3 memory on the market is 2500MHz alone gives away the near maximum support Bclk average. There's really no way to run my CPU and the DDR3 memory at its max for too long. My poor little P55A chipsets. :p

[devil_mcry]

realy, after 2000mhz of ddr3 becomes really useless, the benchmark

but it's possible XD however the memory controller of lynnfield is very very powerfull

[doctorat]

I have a little problem with my ud4p. Very often after restarting and especially if I do some changes in BIOS, motherboard read very low CPU temperature, even negative degrees (- 17oC). Which of course isn't real, I use air cooling. And the consequence of this is that CPU fan doesn't start to turn. Any ideas which is the cause to that problem and what can i do to solve it.
Right now i'm using F11C bios, but the same thing happened when i was with F10.
Thanks in advance and apologies for my awful English.

[ehume]

I have a little problem with my ud4p. Very often after restarting and especially if I do some changes in BIOS, motherboard read very low CPU temperature, even negative degrees (- 17oC). Which of course isn't real, I use air cooling. And the consequence of this is that CPU fan doesn't start to turn. Any ideas which is the cause to that problem and what can i do to solve it.
Right now i'm using F11C bios, but the same thing happened when i was with F10.
Thanks in advance and apologies for my awful English.

I had this trouble a few times. Re-seat your cooler. I am not sure of the cause, but re-seating the heatsink solved the problem for me.

[Splave]

im loving this board
http://valid.canardpc.com/show_oc.php?id=1253071
Stock cooler

[OC Nub]

im loving this board
http://valid.canardpc.com/show_oc.php?id=1253071
Stock cooler

Damn, great results.

This board is much better with memory vs the EVGA board. I think it is an awesome board.

[Splave]

Absolutely, and stronger qpi

[OC Nub]

Is there a such thing as a bclk hole like the fsb hole on the s775 boards?

I could not boot into windows with my i3-530/UD7 at 205x22 no matter what I tried (chip is stable at 4620mhz on my ud6) just trying stuff I lowered the multi and raised bclk, now I am in windows at 215x21. Stability may be another story.

Edit, I figured that problem out. boots fine now

[OC Nub]

For most games this would be a good gaming rig. Installed an Asus EAH4890 and running some 3dmark 05.





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[Sgt_Strider]

Wow, I'm so surprised that no one here has figure this out or even experience this problem. After spending hours on this problem, I am now confident that the problem lies in the fact that the Gigabyte P55A-UD3 motherboard has a problem with my Liteon iHOS104 Blu-Ray reader in AHCI mode. How do I know? Everything works when under IDE mode, but it'll hang if AHCI is enabled and only by resetting the CMOS, can I access the BIOS.

Over at Anandtech, one of the reviewers for the Gigabyte H55-USB3 experienced the same problem as me:

Setting AHCI mode for SATA ports results in not being able to boot from our Pioneer 215-DBK SATA DVD drive (IDE mode works fine). Fortunately there is a workaround for this, press the pause key during the POST sequence just before the drive boot sequence starts, let the board pause for a few seconds and then resume. We’ve reported the problem to Gigabyte and a fix BIOS should be up on the support site shortly, so you won’t need to work around if you flash over.

Gigabyte H55N-USB3 : Mini-ITX done the Gigabyte way... - AnandTech :: Your Source for Hardware Analysis and News

Unfortunately, pressing the pause key didn't help me at all. The screen will pause and then nothing will materialize as I wait.

[Sgt_Strider]

Wow, I'm surprised that no one else has experienced the same problem as me.

Did you guys plugged both your optical drives and SSD on the Intel SATA controllers without any issues with AHCI enabled? I can't get it to work under that scenario and this is frankly pissing me off.

[devil_mcry]

what is trusted DES gigabytes?

show me 220w under Linpack