Which resistors are the ones to shunt mod? I might be interested in doing this to my G14.
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Biker Gremling Notebook Evangelist
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Download link to datasheet pdf: https://www.onsemi.com/pub/Collateral/NCP303150-D.PDF -
Are you sure it's 5 phases for the gpu only or is it divided between the gpu and vram. -
Also, in regards to the hardware ID, I found somewhere that nvidia gpus use resistors on the pcb to determine the pcie address, maybe its possible to switch out a resistor to set the new address? (1f12 to 1f15)
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Biker Gremling Notebook Evangelist
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Link to imgur album: https://imgur.com/a/rVSDrpm
let me know if you need pics of anything else
This is purely anecdotal but I suspect the g14 was originally designed for a stronger gpu. the datasheets suggest that each phase can do ~45w so even at half capacity there's plenty of headroom. There's also a heatpipe solely dedicated to vrm cooling. The 2060mq was debuted on this laptop, maybe it was originally designed for something else but switched to it once it became an option?Last edited: Sep 29, 2020 -
One other thing I noticed was that the motherboard apparently supports perkey rgb. wonder if its possible to add that back in, since some preproduction models had it
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Ok, what you're looking for are two R005 marked components that are in close proximity with each other and the vrm of the gpu.
On my Zephyrus G it was on the other side of the motherboard
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Biker Gremling Notebook Evangelist
However, if you tell me the resistors I have to purchase for the shunt mod, I can get them and disassemble the laptop again and search for the R005 Resistors on the back. -
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Soldering 0.01ohm resistors on parallel will give you 97.5w of power to the gpu give or take.
The next step up would be soldering 0.005 ohm resistors in parallel which will double the stock tdp to 130w.
Pick your poison. Personally I would go for the 130w option and see if the system can handle it. If not, try maximising the cooling by using a lapped heatsink + carbonaut (works as well as Liquid metal).
If it still can't handle it, undervolt the gpu. -
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The only difference is that with "undervolting", you apply the highest stable overclock first, then you flatten the voltage frequency curve from a desired voltage/frequency point onwards.Biker Gremling likes this. -
Biker Gremling Notebook Evangelist
I think I will go for 0,02 ohm (78W). That is a power I know it won't cause issues and mess things up too much. -
Anyways, what do you mean unstable? In what way is it unstable?
I run my Zephyrus G right up to the gpu thermal limit and stability is fine. Cpu clocks are a bit lower but performance or stability isn't affected. -
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I'm just spitballing here with no research whatsoever but would it be possible to stick a digital resistor such as this one: http://cdn.sparkfun.com/datasheets/Components/General IC/22060b.pdf
into the computer and link it up to an i2c/spi bus inside the laptop? you'd have adjustable boost that way -
Biker Gremling Notebook Evangelist
When I got my G14 something I did was to game for very long sessions to see if this could really become my main laptop (the one for not only work, but for also to game on). Something I noticed was that the CPU would constantly hit 105C, and after a while it would BSOD (this was using an external monitor and a cooling pad). Disabling boosting would remove this problem, but the best solution was to use Ryzen Controller (now I run ~25W for games). I estimate that between the repaste, limiting the CPU to 20W, cooling pad and running full fans, 80W on the dGPU is possible. -
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Edit:
R2 = (W1*R1)/(W1-W1) and W2 = (W1*R1)/R2 + W1
Where R2 is the additional resistor, R1 is the original Resistor, W2 is the desired resulting wattage, and W1 is the original WattageLast edited: Sep 30, 2020Biker Gremling likes this. -
Biker Gremling Notebook Evangelist
Well, so today I decided to disassemble my G14 and remove the motherboard to see if there were the resistors to shunt on the back. After a nerve wrecking experience (due to the glued keyboard flex cable), this is what I found:
As it can be seen in the picture, the resistors marked as 4 are present, but these seem to be for measuring the power that comes from the barrel plug. Now, if we peel the cover from the motherboard top...
There are these resistors, but they seem to go to the indicators LEDs. Since there's nothing in the back of interest (that I can tell), let's see what we've got at the front.
So, resistor No 3 if for the battery. I don't know what resistor No 2 is for. There's an R005 marked resistor (No1), but that doesn't seem to be for the GPU. But, what is under that cover next to the SSD?
Aha! More R005 marked resistors, and these are over at the GPU side.
Now comes the interesting part. Without the cover on, I ran Valley Benchmark and tried measuring the Voltage drop on resistors 1 and 6, but unfortunately I couldn't detect any voltage drop. I tried on resistor 3 and measured a drop of 0,02V.
So now, the big question: What resistors are the ones to shunt mod? Do I have to keep searching?Last edited: Oct 1, 2020 -
The problem is, they seem too far away from the gpu vrms. Can you take a picture of the components in the area around the gpu vrms? Also look for any other R005 marked resistors on the board. -
These appear to lead to the vram vrms? Are these a separate component circuit from the cpu/gpu vrms? I don't see a separate voltage controllerLast edited: Oct 1, 2020 -
Biker Gremling Notebook Evangelist
Since I have enough leftover thermal paste, I'm going to remove the heatsink and see what is under the heat shields. Hopefully we find there the elusive resistors.
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Biker Gremling Notebook Evangelist
I'm pretty certain that the resistors under the cover next to the SSD are the ones for the GPU. I say this because they are next to an "ite" voltage regulator, and those are generally used for GPU power delivery control.
The reason I might not be able to measure any voltage drop on these resistors may have been due to the multimeter not having enough resolution to pick up the voltage drop.
I will have to come up with a test or something to find out if these resistors are truly the ones for the GPU.
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Biker Gremling Notebook Evangelist
Now recalling my previous post, we had R005 resistors 1 and 6A and 6B
So what I did was run Valley again and probe the resistors and measure the voltage drop. As mentioned by @thesacredmoocow , we should be around 16mV, and I measured about 17~16,6mV on resistor 6B. For 65W and a reported voltage of 19,2V, being the target about ~16,8mV, we were on point.
Now, the question is what are resistors 6A and No 1 for. My answer is that I don't know. Resistor No 1 would randomly go from 0V drop up to 55mV drop and everything in between without any relationship to the GPU or CPU test running. Resistors 6A however was a mix of both GPU and CPU activity, ranging from 0,5mV up to 12mV. I honestly don't know what could cause this, but my suspicion is system RAM.
However, from the observations made, I can conclude with 100% certainty that resistor 6B is the one dedicated to the dGPU. Now is a matter of ordering the resistor for the shunt mod and getting on with the soldering iron. -
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Biker Gremling Notebook Evangelist
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@Biker Gremling @thesacredmoocow it's best to shunt mod both for best results. One monitors the vram while the other monitors the gpu.
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Biker Gremling Notebook Evangelist
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@Biker Gremling I ended up going with WSL12067L000FEA and ERJ-3LWJR010V resistors from a local canadian supplier if you're still looking for resistor suggestions. Apparently other ppl have used the 1206 form factor, so that size should be good.
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This is unrelated but does anybody know what are the pci-e lane specs of the wifi card slot? I believe it's a pci-e 3x4 slot but I can't find any info about that.
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@Biker Gremling http://www.3dmark.com/spy/14370983
hehehehe
I can probs push it a bit higher too, cpu boost hadn't been tweaked for that run. I got ~9300 cpu on other runs, only 9k for that one.seanwee likes this. -
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So I'm cross shopping this with the blade 13 120hz system. I've got already an area 51m so I don't need something earth shattering in terms of gaming performance.
I'm wondering if the 120hz screen still has ghosting?
How are thermals in a device such as this?
I plan to use it for work and some light gaming. Maybe one windows vm with 8gb of ram for work tasks. And having the ability to usbc trickle charge would be great. -
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custom90gt Doc Mod Super Moderator
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Yeah the ram isn't a big deal as I could get it up to 40. My issue is the display. I'm a display snob admittedly. Feeling like this one will end up letting me down a bit.
Hopefully you get your laptop soon and enjoy it!
Edit: That was my 500th message as well!custom90gt likes this. -
Donald@Paladin44 Retired
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Donald@Paladin44 Retired
Just a head's up...we are down to 5 pieces remaining of the ASUS ROG Zephyrus G14 AniMe Matrix Moonlight White Laptop-Gaming
Asus ROG Zephyrus G14 Owner's Lounge
Discussion in 'ASUS Reviews and Owners' Lounges' started by undervolter0x0309, Jan 26, 2020.