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RTX A2000-X3 | a cool&quiet tripple fan mod for the A2000

Snerual

Cable-Tie Ninja
Jul 3, 2020
196
224
Wouldn't this mean someone with the right skills could make a custom BIOS with power limit removed, negating the need for a shunt mod?
 
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BaK

King of Cable Management
Bronze Supporter
May 17, 2016
967
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Wouldn't this mean someone with the right skills could make a custom BIOS with power limit removed, negating the need for a shunt mod?
"The shunt is just a low value resistor. The VRM controller considers this a fixed value, so by knowing the voltage drop across the shunt, it can calculate the current demand.
When you drop the resistance of the shunt, the VRM controller thinks you are pulling less current.
"

Would the custom BIOS let us directly change the current limit value of the VRM controller?
Or will the VRM controller still check 'electrically / physically' how much current is pulled and react accordingly?
 

GEMCASES

Average Stuffer
GEMCASES
Jul 23, 2023
72
81
Well, to be completely fair my curve was set to 1590MHz so...

Great results with RTX A2000, congratulations!
Also paying a bit attention to my RTX A2000:
1. Used @REVOCCASES drawings for backplate and memory shim. Thank you very much!
2. Setup custom fan curve with Fan control and received zero prm mode
3. Then followed your guide to OC GPU
But still getting lower results than you, am I doing something wrong? Thank you for help in advance.
P.S.: don't plan to do shunt mod.
 
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SFFMunkee

Buy first, justify later?
Gold Supporter
Jul 7, 2021
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Great results with RTX A2000, congratulations!
Also paying a bit attention to my RTX A2000:
1. Used @REVOCCASES drawings for backplate and memory shim. Thank you very much!
2. Setup custom fan curve with Fan control and received zero prm mode
3. Then followed your guide to OC GPU
But still getting lower results than you, am I doing something wrong? Thank you for help in advance.
P.S.: don't plan to do shunt mod.
My GPU is shuntmodded on front and rear shunt resistor :)
 
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SFFMunkee

Buy first, justify later?
Gold Supporter
Jul 7, 2021
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Wouldn't this mean someone with the right skills could make a custom BIOS with power limit removed, negating the need for a shunt mod?
Sadly no, nVidia still sign the VBIOS, so you can't flash modified VBIOS files
 
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slybunda

What's an ITX?
New User
Jun 3, 2023
1
3

GEMCASES

Average Stuffer
GEMCASES
Jul 23, 2023
72
81
Hello, i have also modded my RTX A2000 with triple fan mod inspired by @REVOCCASES and @robbee. With slight difference in heatsink and construction. Posting the result and pictures. Now finally quiet A2000 at light PC use and light noise while full load.
Used heatsink and fans:



 

SFFMunkee

Buy first, justify later?
Gold Supporter
Jul 7, 2021
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Hello, i have also modded my RTX A2000 with triple fan mod inspired by @REVOCCASES and @robbee. With slight difference in heatsink and construction. Posting the result and pictures. Now finally quiet A2000 at light PC use and light noise while full load.
Used heatsink and fans:



Looks great!
 

GEMCASES

Average Stuffer
GEMCASES
Jul 23, 2023
72
81
Looks great!
thank you.
I'm selling now triple fan mod because moved to rtx 4060.
For those who interested visit this thread
 

FlexxRocket

Average Stuffer
Mar 5, 2023
76
26
View attachment 2362

while I am still enjoying my A2000 single slot mod in the 1L Thinkstation P350 Tiny for daily work, I realized that it gets a little bit too noisy for my taste during gaming... the original NVIDIA cooler works OK-isch but I thought there is still room for improvement...

inspired by the discussions in my original A2000 cooler mod thread and @robbee 's latest work I came up with a custom cooler design that features three Silverstone 5010 fans, a skived copper heatsink from Aliexpress and a DIY memory shim...

View attachment 2363

View attachment 2364

View attachment 2365

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finally! a cool&quiet A2000 🥳
How did you Get the 3 Fans together so they only use one 4 Pin connector ?
 

immolationepoch

Chassis Packer
Feb 8, 2023
18
9
I have a question for you learned folks of SFF.Net. My A2000 is shunt modded on the front and rear resistor. In addition I have a 12V line feeding the rear modded resistor from an HDPlex 250W GaN unit. However, when I plug the 6-pin PCIe connector (with the 12V pin only) into my CM 750W SFX unit, the PSU doesn't power on the system. On removal, the system boots just fine. Any idea why this could be?
 

Snerual

Cable-Tie Ninja
Jul 3, 2020
196
224
Sounds like a safety thing on the PSU? It probably doesn’t like sensing a 12V connection but no ground connection on that rail.
 

SFFMunkee

Buy first, justify later?
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Jul 7, 2021
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I have a question for you learned folks of SFF.Net. My A2000 is shunt modded on the front and rear resistor. In addition I have a 12V line feeding the rear modded resistor from an HDPlex 250W GaN unit. However, when I plug the 6-pin PCIe connector (with the 12V pin only) into my CM 750W SFX unit, the PSU doesn't power on the system. On removal, the system boots just fine. Any idea why this could be?
Does it work on another PSU?
 

SFFMunkee

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Jul 7, 2021
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Works well on the HDPlex. I don't have another PSU to test with. The GPU is otherwise fine.
So it works with slot power, but cuts out when attaching the auxiliary power?

Can you show how you’ve wired it up? What resistors did you stack (or replace) for the shunt resistors?
 

immolationepoch

Chassis Packer
Feb 8, 2023
18
9
So it works with slot power, but cuts out when attaching the auxiliary power?

Can you show how you’ve wired it up? What resistors did you stack (or replace) for the shunt resistors?
The GPU works with slot power AND with auxiliary power, but only with the HDPlex. Doesn't with the CM PSU. I guess like @Snerual said..

I'd like the GPU to work with the CM 750 too. Is there a potential workaround?

 
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REVOCCASES

Shrink Ray Wielder
Original poster
REVOCCASES
Silver Supporter
Apr 2, 2020
2,169
3,505
www.revoccases.com
The GPU works with slot power AND with auxiliary power, but only with the HDPlex. Doesn't with the CM PSU. I guess like @Snerual said..

I'd like the GPU to work with the CM 750 too. Is there a potential workaround?


You could try to grab the +12V from another rail... Maybe CPU or SATA
 

SFFMunkee

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Jul 7, 2021
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You could try to grab the +12V from another rail... Maybe CPU or SATA
Ah I misunderstood - sounds like the protection mechanism kicks in because it's detecting voltage/current on the specific 12V rail without the relevant return path. I'd suggest as per REVO says above - do you know what the rail design/spec is on your PSU?