nVIDIA reference GeForce GTX 480 Mods

[Mod_Aap]

Is the no coldbug bios also withoud ocp and ovp?

[BenchZowner]

Is the no coldbug bios also withoud ocp and ovp?

Yeap.
OVP isn't an issue at all however, the GTX 480 scales just at 1.25V to 1.35V

[Mod_Aap]

Yeap.
OVP isn't an issue at all however, the GTX 480 scales just at 1.25V to 1.35V

Ok cool.

I don't have a card so I can't check but is the uP6210A user to power the memory?

[BenchZowner]

Hmmm, I don't know I didn't bother checking.
I'll get back to you later on

[chuchnit]

Hipro just alleviated a ton of tension in the community

[matose]

Hipro is a gentleman as always. Thanks George and good luck at MOA finals !

[knopflerbruce]

Very generously done by Hipro TY!

[MaJ0r]

Big thanks

[Johnny87au]

thank you sir

[G H Z]

OCP Hard mod added.

Anyone tested this?

[BenchZowner]

Don't bother doing hardware OCP mods.
There's a nice software way of taking care of that ( I'll post it later on, gotta go now )

[BenchZowner]

You can disable OCP via software ( flash the CHL8266 controller with a modified firmware which disables OVP & OCP ) [ you still need to do the MEM OCP mod, this disables the OCP for the GPU core only ].
No need to run GPU-z and co, just flash the CHL8266 once and you're done forever

You'll find the necessary files and instructions in the linked RAR archive file:

CHiL 8266 Disabled OCP Firmware - Download from BenchZone
CHiL 8266 Disabled OCP Firmware - Download from RapidShare

Updated the first post too.

[nickless]

First thank's for your efforts.

Is there a difference if I flash the card with No OCP, No OVP BIOS from the first post and if I flash only CHL8266 controller with a modified firmware using the stock bios.
And it is possible to revert CHL8266 original firmware?

[BenchZowner]

You can revert to the original firmware ( although it doesn't really matter, the only difference is that it disables OCP & OVP, which does no harm to the card despite the cooling method used, and is also non-detectable by non-really experts ).
I will get back to you with the PM asap

[nickless]

I try to flash CHL8266 on EVGA GTX480SC, but I receive this error message

All files from archive are copied to bootable USB stick. Am I doing something wrong?

[TJ TRICHEESE]

nice mods, might try these if i get some 480's

[BenchZowner]

@nickless

Sorry man, forgot to enter the full flash command, sometimes ( I don't know why it does that ) you have to define the target device by using the -t switch.

Type chlflash.exe /? to see all the available command switches ( one of them will be a save/dump current firmware, which allows you to save a backup of your current CHL8266 firmware ( BIOS ).

[steponz]

SO does this has been tested to remove OCP? or is it an assumption waiting for test?

[BenchZowner]

It's 100% GUARANTEED.

[T_M]

sweet mod

[steponz]

You da man bench!!!!!!!!!!!

[=[PULSAR]=]

When does the OVP kick in?

[nickless]

@nickless

Sorry man, forgot to enter the full flash command, sometimes ( I don't know why it does that ) you have to define the target device by using the -t switch.

Type chlflash.exe /? to see all the available command switches ( one of them will be a save/dump current firmware, which allows you to save a backup of your current CHL8266 firmware ( BIOS ).

Thank's. I manage to save current firmware, but the commands in help menu are little different from this one in readme.txt (chlflash Vt chl8266 chilocp.txt)

I saved current firmware with "chilflsh -t CHL8266 -b SaveSettings.txt"
Now for flashing with modified firmware if I use the commands in help menu I should use the following command:
chilflsh -t CHL8266 chilocp.txt (in your readme.txt the command is with Vt).
Is this the full flash command (only with -t switch)?

EDIT: Tested, "chilflsh -t CHL8266 chilocp.txt" command works for me
Thank's again.

[steponz]

I did this on my 3 cards.. and now I can't set the clocks with any program... Need a backup.. this is the only thing i did to them and lost the ability to set the gpu core.

[BenchZowner]

That's weird.
Which program are you using ?
Did you switch drivers maybe ?

I'll get you back on track later, need to get some rest now, sorry I'm very tired.