[MOD] HP Omen Accelerator modding thread
 
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[MOD] HP Omen Accelerator modding thread  

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mikolaj612
(@mikolaj612)
New Member
Joined: 2 years ago
 

Hi guys, as a owner of this eGPU solution I just wanted to share some of my mods and ideas about this station Smile

1st of all, if you really want to do something please be aware that I'm not responsible for any damage/warranty void etc.

1) FANS : as you might now both fans (PSU and chassis) are ADDA, they're rather noisy with poor bearing, so I replaced both.

80mm PSU FAN could be anything, I just used Arctic F8 (regular). I just removed tach wire and replace 3 pin connector to 2 pin and voila.
FAN will spin with fixed RPM value but it's much less noisy than original one, there is less airflow, but overall it will be enough.
For those who want more RPM with temp raising I'm proposing Arctic F8 TC with special sensor, that could be placed on heatsink.
But this fan needs to be connected directly to 12V rail.

120mm could be easily replaced when you replace standard Molex connector (KK-254 etc.) to Molex PicoBlade.
You can do it in two diffrent tastes :

- removing original FAN cable and adding 4 PIN male connector (rather cheap and easy to crimp) or,
- buying and FAN extension cable and replace 4 pin connector with PicoBlade (harder to crimp and they will require rather thin wire, AWG #24 at best, where some FANS are using AWG #22).

PWM is somehow fixed value so you won't get good airflow (exhaust) from chassis, so replacing a fan will give you silence (if you're looking for 4 pin FAN), but you can easily remove PWM wire to achieve better airflow.
From my point of view 3 pin FAN is a better solution here, especially when you can use an adapter to slow him down a little.
Another solution is to use Arctic F12 TC FAN, which is 3 pin + additional sensor that could be placed near GPU, when temp is raising RPM will follow.
This is probably best solution in this chassis to obtain good performance and less noise.

But to replace chasiss FAN you need to make your own adapter with PicoBlade connector, as far as I know there is nothing like that to buy directly, so you need to "craft" it yourself.

2) PSU and Wires: HP is using Lite-ON PSU unit, which is labeled as multirail, but inside it look like all those 12V rail are tied together anyway.
v12D soldering point is not used here (dunno why), with some skill and time you can replace original ATX24 wire and PCI-E wires with something longer or even replace 6+8 config with more proper 8+8 (as I did), also I didn't like those loose cables without any braind on them.
I used black, flat wires in my PSU, as far I can see there should be no problem with supplying 300W of power via PEG connectors.

PCI-E slot could deliver 75W max at best, so we've got 375W max for GPU.
So we still got 45W for anything else like chassis FAN, and other IC's.
I think it should be enough but I do not recommend staying close to that power draw anyway Smile

They probably asumed that 75+150W+75W for GPU will be sufficient and will stay great below PSU handling capability.
But how about GPU's like mine (Zotac GTX1070Ti) which is using 8+8 power connector, with TDP ~ about 180W + 40% of power limit that could be added we've got 252W. From my piont of view they should add a little stronger PSU or just inform people that they've got 8+8 config but GPU shouldn't draw more than 250-300W.

Worst thing in this chassis except poor plastic quality is airflow, both FANS are weak and noisy.
This station is really looking for a blower card rather than any other, because chassis FAN will make no real diffrence when exhausting hot air from chasis to outside world.
PSU quality is fine, there is nothing bad inside it, kinda good capacitor quality, proper soldering, wires are proper in term of AWG, efficiency is well enough for single GPU.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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mmmalas
(@mmmalas)
New Member
Joined: 2 years ago
 

I had just returned mine, as its massive. 
the shape is awkward for transportation, and no proper way to carry or handle it.

if you want something just to sit on your desk, then fair enough.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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mattmin
(@mattmin)
New Member
Joined: 2 years ago
 

all over the net.  this is sole  thread for replacing fans of this machine.
In my case, PSU fan at the back side is very noisy.  So I have to replace it.  
Firstly I have to say that I'm novice for this area.
So exacty what was the pin for the existing fan? 3 pin? or 4 pin?  
I don't know what should i  buy among these..
and What did you use ?  80mm standard?  2000 rpm? 
I can't understand why you are saying 'FAN will spin with fixed RPM value but it's much less noisy than original one, there is less airflow, but overall it will be enough'
2000 rpm isn't enough?

https://www.amazon.com/ARCTIC-F8-PWM-PWM-Signal-Configuration/dp/B002QVFN7G/ref=sr_1_1?keywords=80mm%2Barctic%2Bfan&qid=1552834203&s=hi&sr=1-1-catcorr&th=1

would you pls help me ?

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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