Precision M6800 questions and upgrades

[Bublik]

Hi SuperMG,

How did you enable Above 4G decoding? I thought all GPUs starting with Ampere needed it in the sBIOS. Is there a solution for this?

[SuperMG]

4 hours ago, Bublik said:

Hi SuperMG,

How did you enable Above 4G decoding? I thought all GPUs starting with Ampere needed it in the sBIOS. Is there a solution for this?

No need to enable it. Ampere and Ada cards work on M6700 and M6800, in eDP, in pure-UEFI, no Legacy options. 

 

It depends on the vbios but mine did have 4G decoding but it wasn't obligated.

[SuperMG]

On 3/31/2026 at 2:13 AM, Aaron44126 said:

 

You can use a 330W adapter and it will work (any Dell adapter with the right connector on the end), but it is not going to pull the full 330W. Just like how you can plug one of the Precision 240Ws into a Latitude with integrated GPU and it will "work", but it won't pull nearly 240W.

 

Past experiments with this era of systems have shown that it doesn't really give you any "benefit" over 240W. It might be helpful if you are using one of these >100W aftermarket GPU upgrades, if there isn't something in the system that would cap the power going to the card. It would be interesting to have some comparison benchmarks.

Hello. So 330W will fully work (past 240W) if we use a 150W MXM card? 

 

I get orange blinking in 3DMark TimeSpy but the performance doesn't throttle. I use an old 330W Dell PSU + FV993 battery.

 

I think the motherboard is cooked, the charging IC part, it doesn't charge. I got the laptop as parts, it had a BIOS lock and I didn't test anything before doing the big upgrades. I bought a new Dell 330W PSU after but I've the same issue, no charging.

 

I bought 2 eDP motherboards after and I'll test one of them. (140€ for 2)

[Aaron44126]

24 minutes ago, SuperMG said:

Hello. So 330W will fully work (past 240W) if we use a 150W MXM card?

 

Cannot confirm. Have not tried it personally. I have heard multiple stories of users trying 330W in "regular" hardware configurations and it not offering any benefit over 240W at all. But stock configurations are hard to push past 240W power needed just for compute. So what I was going for is something like: if there is any chance that >240W will get you some benefit, you'd have to be using an aftermarket high-power GPU.

 

If the system isn't charging, I doubt that it is the PSU's fault. The system should charge even with a 90W adapter (maybe even less) if it is powered off. I see you have new motherboards on the way to test, but there's also a chance that it could just be the battery going bad?

[SuperMG]

26 minutes ago, Aaron44126 said:

 

Cannot confirm. Have not tried it personally. I have heard multiple stories of users trying 330W in "regular" hardware configurations and it not offering any benefit over 240W at all. But stock configurations are hard to push past 240W power needed just for compute. So what I was going for is something like: if there is any chance that >240W will get you some benefit, you'd have to be using an aftermarket high-power GPU.

 

If the system isn't charging, I doubt that it is the PSU's fault. The system should charge even with a 90W adapter (maybe even less) if it is powered off. I see you have new motherboards on the way to test, but there's also a chance that it could just be the battery going bad?

No, I tested with 2 batteries. Same results. One is a new aftermarket (Kingsener) one that charges on M6700 and one that's OEM that charges on M6700 as well.

 

None charges with the M6800. I was able to get 154W in the MXM slot too, no power cuts, no throttles.

 

4080M: 16000 GPU scores in TimeSpy. 260-270FPS in Heaven benchmark 4.0 1080p Ultra.

 

 

I don't think the load on the MXM made the charging IC goes bad.

 

Otherwise the whole power rail would be failing and the laptop won't power on.

Edited April 16 by SuperMG

[SuperMG]

33 minutes ago, Aaron44126 said:

 

Cannot confirm. Have not tried it personally. I have heard multiple stories of users trying 330W in "regular" hardware configurations and it not offering any benefit over 240W at all. But stock configurations are hard to push past 240W power needed just for compute. So what I was going for is something like: if there is any chance that >240W will get you some benefit, you'd have to be using an aftermarket high-power GPU.

 

If the system isn't charging, I doubt that it is the PSU's fault. The system should charge even with a 90W adapter (maybe even less) if it is powered off. I see you have new motherboards on the way to test, but there's also a chance that it could just be the battery going bad?

I forgot one thing. When I plug any PSU, 240W or 330W when the laptop is shutdown.

 

The charging led doesn't come on, if it was charging, it'll light up.

[Tetsu]

On 2026/4/5 at 午後11時50分, DynamiteZerg said:

ZRT社と直接4090の購入手続きを完了しました。来週末か再来週初めには届くはずです。

 

eDP M6800と関連部品が届くまでの間、LVDS M6800でテストしてみます。 

Hello, nice to meet you.

Have you received your ZRT 4090 card?

Actually, I was planning to buy one from Taobao as well, but I canceled the purchase due to moving and other circumstances.

It seems that Taobao sometimes sells products with ZRT photos but the actual card inside is an X-Vision.

This happens frequently with online shopping. There have even been cases where RTX 5090 cards had their internal components replaced with pebbles.

[DynamiteZerg]

11 hours ago, Tetsu said:

Hello, nice to meet you.

Have you received your ZRT 4090 card?

Actually, I was planning to buy one from Taobao as well, but I canceled the purchase due to moving and other circumstances.

It seems that Taobao sometimes sells products with ZRT photos but the actual card inside is an X-Vision.

This happens frequently with online shopping. There have even been cases where RTX 5090 cards had their internal components replaced with pebbles.

Yes, I've received the 4090 from ZRT. I have very busy at work and didn't get to testing it out yet. 

 

Don't bother trying to get the ZRT 4090 from Taobao. All the sellers use the ZRT pictures but sell you an X-Vsion card and try to sprout nonsense saying that they are the same time. 

 

I just went through one such case and went through great efforts to get card refunded. 

 

So i directly contacted ZRT and got the card from them instead.

 

Price wise, the difference between Taobao's supposed ZRT 4090 and the actual card from ZRT is not much. However, you get the full warranty and technical support directly from ZRT. 

 

If you want, I can share with you via PM the sales manager's contact details. You can reach out to her to sort things out. 

[Tetsu]

2 hours ago, DynamiteZerg said:

はい、ZRTから4090を受け取りました。仕事がとても忙しくて、まだテストできていません。 

 

TaobaoでZRT 4090を入手しようとしても無駄です。どの販売者もZRTの写真を使っていますが、実際にはX-Vsionカードを販売し、同じものだとでたらめなことを言ってきます。 

 

私もつい最近、同じようなケースを経験し、カードの払い戻しを受けるために大変な苦労をしました。 

 

そこで私はZRTに直接連絡を取り、彼らからカードを入手しました。

 

価格面では、淘宝（タオバオ）で販売されているZRT 4090とZRT純正品との差はそれほど大きくありません。しかし、ZRT純正品であれば、完全な保証と技術サポートを直接受けることができます。 

 

ご希望であれば、営業マネージャーの連絡先をプライベートメッセージでお送りします。彼女に連絡して問題を解決してください。 

Thank you for your reply.

I would really appreciate it if you could also provide me with the contact information for the ZRT representative. I hope to be able to purchase directly from ZRT.

Contact Information
Free email address: *****@*****.tld

[Tetsu]

2 minutes ago, Tetsu said:

お返事ありがとうございます。

ZRTの担当者の連絡先も教えていただけると大変助かります。ZRTから直接購入できればと思っています。

連絡先情報
無料メールアドレス: *****@*****.tld

The contact information appeared garbled.

[Tetsu]

3 hours ago, DynamiteZerg said:

はい、ZRTから4090を受け取りました。仕事がとても忙しくて、まだテストできていません。 

 

TaobaoでZRT 4090を入手しようとしても無駄です。どの販売者もZRTの写真を使っていますが、実際にはX-Vsionカードを販売し、同じものだとでたらめなことを言ってきます。 

 

私もつい最近、同じようなケースを経験し、カードの払い戻しを受けるために大変な苦労をしました。 

 

そこで私はZRTに直接連絡を取り、彼らからカードを入手しました。

 

価格面では、淘宝（タオバオ）で販売されているZRT 4090とZRT純正品との差はそれほど大きくありません。しかし、ZRT純正品であれば、完全な保証と技術サポートを直接受けることができます。 

 

ご希望であれば、営業マネージャーの連絡先をプライベートメッセージでお送りします。彼女に連絡して問題を解決してください。 

Thank you for your reply.

I would also like to purchase directly from ZRT. Could you please provide the contact information for a ZRT representative?

Contact email address:
*****@*****.tld

[Tetsu]

3 hours ago, DynamiteZerg said:

はい、ZRTから4090を受け取りました。仕事がとても忙しくて、まだテストできていません。 

 

TaobaoでZRT 4090を入手しようとしても無駄です。どの販売者もZRTの写真を使っていますが、実際にはX-Vsionカードを販売し、同じものだとでたらめなことを言ってきます。 

 

私もつい最近、同じようなケースを経験し、カードの払い戻しを受けるために大変な苦労をしました。 

 

そこで私はZRTに直接連絡を取り、彼らからカードを入手しました。

 

価格面では、淘宝（タオバオ）で販売されているZRT 4090とZRT純正品との差はそれほど大きくありません。しかし、ZRT純正品であれば、完全な保証と技術サポートを直接受けることができます。 

 

ご希望であれば、営業マネージャーの連絡先をプライベートメッセージでお送りします。彼女に連絡して問題を解決してください。 

I found a ZRT-made RTX 4090 on a site called "Ali1688," separate from Taobao.

However, I'm not sure about its legitimacy. The picture shows it as a ZRT product, but since others have been deceived, I can't just buy it without careful consideration.