roko71
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2018/12/30 12:04:21
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I just checked my new Dark board, it was reading +/_ 5mV. Not good. Replaced it, and now waiting for new 9800x :) Bat was DBV 3.3v Lith. Board SN 18229302998022???, someone needs the rest, call me. Problem solved before it became a problem, thank you all. Roger PS, I was testing the bat on a Keithley 6500 DMM, 10000 read/sec. Those bateries are not drained but absolutely defective.
post edited by roko71 - 2018/12/30 12:11:56
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2018/12/30 12:26:41
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roko71
I just checked my new Dark board, it was reading +/_ 5mV. Not good.
Replaced it, and now waiting for new 9800x :)
Bat was DBV 3.3v Lith.
Board SN ###############, someone needs the rest, call me.
Problem solved before it became a problem, thank you all.
Roger
PS,
I was testing the bat on a Keithley 6500 DMM, 10000 read/sec. Those bateries are not drained but absolutely defective.
 Simple Fix, Replace the Battery. We know we are seeing this and telling others to replace their battery and if they do not at least test the battery before they install the Motherboard it is on them.
post edited by bcavnaugh - 2018/12/30 12:29:10
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Sach DJ
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2018/12/30 13:21:39
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I've installed my Dark for 2 weeks now and I've been fine, but now after all these posts I think I will change the battery anyway since I cannot realy test the voltage on it
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2018/12/30 16:15:23
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Sach DJ
I've installed my Dark for 2 weeks now and I've been fine, but now after all these posts I think I will change the battery anyway since I cannot realy test the voltage on it
You would know the First Day you have a bad Battery, so after 2 Weeks you should be fine.
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Ravenmaster
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2018/12/31 16:44:11
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roko71
I just checked my new Dark board, it was reading +/_ 5mV. Not good.
Replaced it, and now waiting for new 9800x :)
Bat was DBV 3.3v Lith.
Board SN 18229302998022???, someone needs the rest, call me.
Problem solved before it became a problem, thank you all.
Roger
PS,
I was testing the bat on a Keithley 6500 DMM, 10000 read/sec. Those bateries are not drained but absolutely defective.
EVGA X299 Dark works great with i7 9800X i can confirm (i have that setup).
Asus ROG Maximus Z790 Dark Hero | Intel Core i9-14900KF | RTX 4090 FE | 2x32GB Corsair Dominator Titanium DDR5 RAM (7200mhz) | 2x Samsung 990 Pro 4TB M.2 NVMe's for main OS and backup) | Windows 11 Pro 64-bit 23H2 |Klipsch 5.1.2 Dolby Atmos speakers + Denon AVR-X2800H Receiver | LG 42" C2 OLED | EVGA ASSOCIATE CODE: JRKV0L1B1GY3ADW 
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roko71
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/02 06:18:22
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GGTV-Jon
Now that would be interesting, the board is so power hungry it eats the cmos battery by the time it gets to the customer. Would have to make an external holder and hook a meter between the battery and board to see what the parasitic draw is with a good meter that can do milliamps
Now who do we know that has a few of these boards and perhaps the equipment to do so??? hrmm, someone needs to contact Buildzoid, sounds like something he would be into testing
note: I was actually thinking of bcavnaugh when joking about testing then thought of Buildzoid
I did just that, this is not verry accurate with this setup but it wil give an indication i think :) I uploaded 2 images, 1 for Resistance and 1 for current.
post edited by roko71 - 2019/01/02 06:28:24
Attached Image(s) 
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KimbaWLion
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/06 18:37:13
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Well hardly being an expert, I took out my trusty AND Historic Fluke 8020A. It may be an antique BUT it still works peachy... My results? 3.26V on my brand new Sony vs .01V on the EVGA factory battery... Look, I am glad I read about this here, but how did I get so lucky! This is one thing I should NEVER have to worry about in a brand new state of the art motherboard. Sorry they REALLY missed the boat on this one... It is a VERY, VERY good thing I read about this here... I would be doing a whole lot of yelling and screaming now otherwise...
post edited by KimbaWLion - 2019/01/06 18:51:45
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bcavnaugh
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Vlada011
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/07 02:28:27
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So good motherboard.
That multimeter is older than me, but good things work.
America produce so good and quality parts before send production in Asia that Japanese electronic equipment and Hi-Fi who now look ultra high quality compare to Chinese and we hope to buy so good quality... they were cheap craps when start to show up in USA at the late of 1970th and 1980th. It's tragedy that if America remove production back to their soil and use materials from Europe and USA and price increase because quality younger generation will scream... I'm not crazy to pay 1000$ when I could find for 600$ from China. Such ideology is worse. Buying stolen patents and produced to last shorter and to be cheaper and more affordable, yes they are cheaper, but for their duration and quality they need to be much more cheaper and that's moment where Asia profit most, they put lower price to attract customers but not enough love to be equal with quality.
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KimbaWLion
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/07 11:03:52
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Vlada011
So good motherboard.
That multimeter is older than me, but good things work.
America produce so good and quality parts before send production in Asia that Japanese electronic equipment and Hi-Fi who now look ultra high quality compare to Chinese and we hope to buy so good quality... they were cheap craps when start to show up in USA at the late of 1970th and 1980th. It's tragedy that if America remove production back to their soil and use materials from Europe and USA and price increase because quality younger generation will scream... I'm not crazy to pay 1000$ when I could find for 600$ from China. Such ideology is worse. Buying stolen patents and produced to last shorter and to be cheaper and more affordable, yes they are cheaper, but for their duration and quality they need to be much more cheaper and that's moment where Asia profit most, they put lower price to attract customers but not enough love to be equal with quality.
Don't know if it's a good MB or not as I have yet to install it. I DO know the battery is good as shown by the historic, made in the 70's Fluke Multi-meter. And yep that meter was made 100% in America strange as that may sound. Nothing Fluke makes is cheap no matter where it's made now. I DO hope to get my computer rebuilt in a week or so. Still need some parts etc. But here's hoping!
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jeffswitzer
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/10 08:33:54
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My x299 dark also arrived with dead CMOS battery, replacing it fixed loosing bios settings when unplugging power. Board was ordered on Sept 27, 2018.
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Wickedlester
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/10 11:46:48
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Well, I too ran into the checksum error. Can't believe a company with evga's CS would send out a new MB with dead CMOS batteries. I've built dozens of PC's and this is the first time it's happened on a new MB. I, unfortunately, did not come here prior to my first build. Everything went great, until I got multiple checksum errors. Had to completely remove the MB to get the screws out of the M.2 cooler. I was successful and got everything back together. No more checksum errors. Purchased sometime in Dec. (was my xmas gift)
The lesson I learned (Always put a fresh CMOS batter on a MB when you have it out or it's new).
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/10 11:48:53
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Wickedlester
Well, I too ran into the checksum error. Can't believe a company with evga's CS would send out a new MB with dead CMOS batteries. I've built dozens of PC's and this is the first time it's happened on a new MB. I, unfortunately, did not come here prior to my first build. Everything went great, until I got multiple checksum errors. Had to completely remove the MB to get the screws out of the M.2 cooler. I was successful and got everything back together. No more checksum errors. Purchased sometime in Dec. (was my xmas gift)
The lesson I learned (Always put a fresh CMOS batter on a MB when you have it out or it's new).
I cannot believe you did not read this Thread First 
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jollydet
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/10 22:48:30
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Except thats not really a fair comment though is it bcavnaugh. Why would someone come to a support forum on the assumption of a problem before doing a build. Most would assume the product they bought was intact and free of defects.
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GGTV-Jon
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/10 22:54:09
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To play devils advocate why would you not research and look at the support forums when doing such a build?
I would think anyone that is going to build a system and use something like an X299 Dark and the money spent on the rest of the components to go along with it did a little research / reading
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Wickedlester
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/11 16:34:21
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Wow, I didn't realize there was so much [EDITED] over reporting this on the forum in the correct thread.
post edited by EVGATech_AdamB - 2019/01/24 13:00:10
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KimbaWLion
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/11 20:42:47
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Hello there, There are so many real experts here that I always looks first. It's because of this forum etc. that EVGA a few back gave us all a huge discount on our X79 boards over their quality control issues even back then. During their recent sales you could have bought any of X299 EVGA's MBs for $199. I ended up with the Dark because of some of things I read. I almost bought a FTW or the Micro 2. Except for some minor quirks such as no header for USB 3.1C and not even minimalist RBG support ( I mean it can be a serious MB but at LEAST have some RBG support headers!!!), but in the end I bought the Dark because between all the reviews and Gamer's Nexus etc., they ALL said this one's the best of the best when it came to solid dependable performance. Many have paid $600 for the ROG x299 board but I paid $199 for the X299 Dark and I heard it was even less at one point. Some here can be a little tough at times but I don't fault you. TBH I believe EVGA SHOULD do something for any of us who had a battery issue. It DOES take a little bit of time, as it IS a hassle on the Dark X299, and WHY SHOULD we have to replace our brand new MB battery. No matter how you slice it there really is no excuse for it. You are MORE than right there and I join you in that. It's just in all my years I automatically come here and PM certain members before I do anything. Now that may sound silly to some and I shouldn't have to do that, but I am glad I do. You can see by posted pics, I too was a victim of POOR quality control and EVGA has YET to make a definitive comment about it, and to be honest that DOES bother me a bit... To think EVGA has to thank so forum members before who knows HOW many boards would be RMA'd!!! I would NEVER think to look at a CMOS battery in a BRAND NEW MB!!! I am sorry if some members come off kind of rough but they mean only the best and they have helped me immeasurable over the years, that and EVGA's 24/7 Tech support. I will never forget opening up my first X79 MB and it was DEAD out of the box because of the BIOS, EVGA over-nighted me a new MB that still had issues out of the box. They then upgraded me to the NEXT FTW model for free and finally I had my X79 running on and off until the Dark for 5 years. I had issues after that but some just do I am one those lucky ones... Anyway welcome to the X299 Dark community here and stick around, it gets lots better (IMHO of course). 
post edited by EVGATech_AdamB - 2019/01/24 13:00:42
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Cordorb
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/14 20:00:45
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HAHA - We have the same Fluke meter ( still have my heathkit Vacuum tube volt meter as well as a backup)
It is very possible the batteries voltage were OK when placed into the board
In the QC field you have to check back on the batch number as a bad chemical mix or pressing causing low life or internal shorts.
I do not have my Dark board yet - but if I did - I would look at the bare board using a micro amp meter in line with the battery
never know a blocking diode may be in backwards :-)
----
You many not need a volt meter to test 3.3 volt batteries if you have a younger sibling.
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/24 12:07:48
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3rd MB 3rd D B V Dead Battery, Service Ticket Submitted.
post edited by bcavnaugh - 2019/01/24 12:11:05
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zerocool101
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/01/24 13:28:19
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Sucks for people who haven't been on the forums here and have no idea the battery is dead on their DARK x299 till after they build their PC and then have to rip it all apart to replace this defective BIOS battery.  NJ EVGA!!!!
13900KS on Z690 Dark KP FE 4090
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rusTORK
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/02 14:16:33
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I got two boards: one in opened box and one still sealed (for sale), but i already have to worry about to check battery and where get tools to check it (i don't have multimeter and i also don't know how to use it. Not a big deal with internet and youtube, but still).
At least, i already know about problem!
I don't blame EVGA for that... battery are die and it should not ruine experience from high-end motherboard.
P.S. Um... can i get $2 on new battery (or whatever it cost) from EVGA? :) C'mon!
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/02 14:37:59
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rusTORK
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/02 14:52:16
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bcavnaugh
I got this as it is simple to use and cheap, Under $20
It's bad in general to spent $20 on multimeter to test $2 battery voltage. No go. Don't get me wrong, multimeter is good thing, but it's good thing when used often and for a reason. Also, i would better get Fluke, since i already have got infrared thermometer from them. I better remove battery from motherboard and test with lab equipment at work. There should be specialists who know how to use multimeter or at least give it to me for test. I still have to buy one battery and give it with second motherboard and inform buyer that battery in his new motherboard may be dead. That's sad.
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/02 15:24:54
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rusTORK
bcavnaugh
I got this as it is simple to use and cheap, Under $20
It's bad in general to spent $20 on multimeter to test $2 battery voltage. No go.
Don't get me wrong, multimeter is good thing, but it's good thing when used often and for a reason. Also, i would better get Fluke, since i already have got infrared thermometer from them.
I better remove battery from motherboard and test with lab equipment at work. There should be specialists who know how to use multimeter or at least give it to me for test.
I still have to buy one battery and give it with second motherboard and inform buyer that battery in his new motherboard may be dead. That's sad.
Not when you are also going to use it for Other Uses. Anyway you could just stick it in your Mouth and if you get a Zing then it is ok. I did not get a Zing when I tested my 3 this way.  But Spending $100 Bucks for a Fluke is out of the Question.
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Cordorb
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/02 17:10:30
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It is ok to just use the Tip of the tongue on a 3.3 Volt battery even a 9 Volt battery
wash the mouth after to be safe as some dead batteries can leak
We do wonder why all these dead batteries
I have never seen a DOA new 3.3 volt cell battery and I just wanted to make sure an unpowered motherboard was not draining the battery too fast.
-------
there are photo batteries that look like a little bigger 9 volt battery but are 45 Volt
I only tested them ONCE with the bcavnaugh Biological Testing Method.
[font="verdana, geneva, sans-serif; font-size: 12px; font-weight: bold; background-color: #f7f7f7"]
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/02 17:50:12
(permalink)
Cordorb
It is ok to just use the Tip of the tongue on a 3.3 Volt battery even a 9 Volt battery
wash the mouth after to be safe as some dead batteries can leak
We do wonder why all these dead batteries
I have never seen a DOA new 3.3 volt cell battery and I just wanted to make sure an unpowered motherboard was not draining the battery too fast.
-------
there are photo batteries that look like a little bigger 9 volt battery but are 45 Volt
I only tested them ONCE with the bcavnaugh Biological Testing Method.
Was that test done with or without Static Ground Strap
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rusTORK
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/07 09:37:57
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Finally founded time to deal with X299 Dark. I opened manual, read it a bit, didn't founded page about replacing battery and have to figure out removing cover by myself. Need to remove only 4 screws on the back, lift cover a bit up, locate battery socket, press on battery holder and it will pop-up. I will test it tomorrow in lab.  Battery is made by "D B V", number on another side is "79". P.S. I opened box second time and... damn, this board is heavy! I understand now why cover is made of plastic... if it was made of metal - it will be even more heavy.
post edited by rusTORK - 2019/02/07 09:44:18
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/07 09:42:11
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rusTORK
Finally founded time to deal with X299 Dark. I opened manual, read it a bit, didn't founded page about replacing battery and have to figure out removing cover by myself.
Need to remove only 4 screws on the back, lift cover a bit up, locate battery socket, press on battery holder and it will pop-up. I will test it tomorrow in lab.
Battery is made by "D B V", number on another side is "79".
P.S. I opened box second time and... damn, this board is heavy! I understand now why cover is made of plastic... if it was made of metal - it will be even more heavy.
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rusTORK
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/07 23:39:50
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So, battery is dead. 
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bcavnaugh
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Re: X299 DARK - hard boot, getting "CMOS checksum error"
2019/02/08 12:40:41
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Yep! I am glad this thread is here and hope others will read it a just replace their Battery. A Bad D B V Lot of Batteries. Not sure why this Thread is NOT Pinned, but it should be.
post edited by bcavnaugh - 2019/02/08 12:43:03
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