Precision M6800 questions and upgrades

[DellBoy]

10 hours ago, panda_zzz said:

16GB modules will not work.

 

I've seen a guy (not on here) claim that he got 64GB to work. According to him the only prerequisites were an i7 processor and the latest BIOS update. However, I bought a 64GB kit counterpart to my 32GB kit (so I could 'guarantee' it was compatible) and all I got was RAM errors and failures to boot.

 

It does seem strange if the M6800 wouldn't be able to take double the official amount of RAM, as E-series Latitudes of that era could (or at least some).

[MicXTech]

44 minutes ago, Annihilator said:

 

i have 2x 8GB ripjaws V 1866 C10 in my M6800 n works perfect at that speed, they r same like hyperX, plug n play with the programmed speed. just waiting for my 4x 2133 to arrive, got a set for around 150 bucks + shipping, isnt cheap but will push the CPU limit another 2-5% up, depends which game 😄 

I am quite surprised you found some! After a full day of searching, I ended up finding some but the price is insane haha. Click if you dare https://thewizzcomputers.com/product/kingston-technology-hyperx-impact-black-8gb-2133mhz-ddr3l-1-35v-laptop-memory-hx321ls11ib2-8/. To be honest not even sure you can buy it because there's no purchase button.

 

I'm still on the hunt! Someone was selling some on eBay (UK) until January for £25 but only 4GB modules.

[Annihilator]

35 minutes ago, MicXTech said:

I am quite surprised you found some! After a full day of searching, I ended up finding some but the price is insane haha. Click if you dare https://thewizzcomputers.com/product/kingston-technology-hyperx-impact-black-8gb-2133mhz-ddr3l-1-35v-laptop-memory-hx321ls11ib2-8/. To be honest not even sure you can buy it because there's no purchase button.

 

I'm still on the hunt! Someone was selling some on eBay (UK) until January for £25 but only 4GB modules.

 

ebay usa 😄

 

someone from dublin has a 2x8GB kit in ebay for 500 bucks 🤪

[Annihilator]

49 minutes ago, DellBoy said:

 

I've seen a guy (not on here) claim that he got 64GB to work. According to him the only prerequisites were an i7 processor and the latest BIOS update. However, I bought a 64GB kit counterpart to my 32GB kit (so I could 'guarantee' it was compatible) and all I got was RAM errors and failures to boot.

 

It does seem strange if the M6800 wouldn't be able to take double the official amount of RAM, as E-series Latitudes of that era could (or at least some).

 

think is depending in the quality of the imc from the CPU too, possible u need to put some mV extra on the imc when u want use full set of high speed mem with dual rank modules

[panda_zzz]

6 hours ago, DellBoy said:

It does seem strange if the M6800 wouldn't be able to take double the official amount of RAM, as E-series Latitudes of that era could (or at least some).

This is not a problem with the laptop itself, but a problem with the Intel processor. The 3rd and 4th generations do not work with modules larger than 8 gigabytes per channel. We tried this on different models and different laptops, and the result was the same everywhere. Even with modifications such as coreboot. It is rare to find mentions that someone has succeeded, but for some reason, there are no screenshots or videos to accompany these claims.

[DellBoy]

1 hour ago, panda_zzz said:

This is not a problem with the laptop itself, but a problem with the Intel processor. The 3rd and 4th generations do not work with modules larger than 8 gigabytes per channel. We tried this on different models and different laptops, and the result was the same everywhere. Even with modifications such as coreboot. It is rare to find mentions that someone has succeeded, but for some reason, there are no screenshots or videos to accompany these claims.

 

Yeah I did press him for further info but he never replied. The guy did also claim that 2133MHz RAM could work, which you guys have confirmed. I don't know why he'd lie about it. The only thing is I wasted about £70 on RAM... although I bought direct from China as a similar 64GB kit in the UK was like £5-600... and that was before the RAM crisis!

[Annihilator]

5 hours ago, panda_zzz said:

This is not a problem with the laptop itself, but a problem with the Intel processor. The 3rd and 4th generations do not work with modules larger than 8 gigabytes per channel. We tried this on different models and different laptops, and the result was the same everywhere. Even with modifications such as coreboot. It is rare to find mentions that someone has succeeded, but for some reason, there are no screenshots or videos to accompany these claims.

 

maybe on XEON mobile with ECC modules? 

 

edit: would be low power ones with LGA 1150 = desktop ones 🫠

[panda_zzz]

1 hour ago, Annihilator said:

maybe on XEON mobile with ECC modules? 

And what Xeon processors are on the laptop socket g3? Just as I haven't seen any ECC memory in the DDR3 SO-DIMM format.

[DynamiteZerg]

On 2/9/2026 at 9:13 PM, SuperMG said:

If 5090 has the same offset as the RTX 4090 MXM then yes. Quadro RTX 5000 Aetina, PNY, ADLINK will fit too!

 

It's the holidays for China, maybe contact the seller if an early shipping is possible or not

Which ones will you recommend? RTX 5090, RTX 4090 or Quadro RTX 5000? I want to give them a try!

[SuperMG]

24 minutes ago, DynamiteZerg said:

Which ones will you recommend? RTX 5090, RTX 4090 or Quadro RTX 5000? I want to give them a try!

5090 not exists yet.

 

Just get the RTX 4080 ZRT or 4090 ZRT version. You need to have eDP display if you want a full dGPU performance + the backlight mod cable.

[Annihilator]

3 hours ago, panda_zzz said:

And what Xeon processors are on the laptop socket g3? Just as I haven't seen any ECC memory in the DDR3 SO-DIMM format.

 

how i said, would be LGA 1150 with LP xeon, n more then enough ddr3 sodimm modules with ECC ava, bcs supermicro used them in their mini workstations 

[DynamiteZerg]

5 hours ago, SuperMG said:

5090 not exists yet.

 

Just get the RTX 4080 ZRT or 4090 ZRT version. You need to have eDP display if you want a full dGPU performance + the backlight mod cable.

Ah yes, I have read some performance issues/limitations if it is working through Optimus. Does the backlight not work using Optimus?

 

I will have a look at the RTX 4080 or 4090 ZRT version or Quadro RTX 5000 depending on your recommendations.

[panda_zzz]

2 hours ago, Annihilator said:

how i said, would be LGA 1150 with LP xeon

Well, we're talking about a specific laptop that has a specific processor socket for which there are no Xeon processors.

[SuperMG]

32 minutes ago, DynamiteZerg said:

Ah yes, I have read some performance issues/limitations if it is working through Optimus. Does the backlight not work using Optimus?

 

I will have a look at the RTX 4080 or 4090 ZRT version or Quadro RTX 5000 depending on your recommendations.

Get the ZRT RTX 4080/4090 and the best CPU available for that platform. I tested Optimus with the cable on. The brightness control works of course because the display is rooted from the iGPU.

 

in dGPU, the display comes from the GPU. The brightness control may not work and you'll be stuck at 100%. Some motherboards allow brightness control without being dependent from the dGPU such as the Clevo P570WM3. On the M6800, the brightness control is dependent of the GPU.

 

I'll make a version 2 of the backlight mod cable (once 80% of the v1 is sold). It'll have a manual tiny PWM slider to control the brightness (pin 27)

Edited 49 minutes ago by SuperMG