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Good to read that it works! I was afraid that removing resistors could destroy your card.

I got the same issue for audio on my domU Win7 while playing game. On this domU Win7 AMD driver was previously installed too. So it is to be an usual issue.

Kind regards.

David

Le Samedi 19 octobre 2013 3h45, Casey DeLorme <cdelorme@xxxxxxxxx> a écrit :

Mostly Great News!

I managed to make the modification. Sadly my hand slipped and I took off two other resistors of unknown purpose (unrelated to PCI Device Id). I decided to install it anyways and give it a try.

Linux recognized it as a GK104 (Grid K1). Passed it to Windows, and installed the Grid K1 drivers. Rebooted and voila 100% functional video card, including the audio component over HDMI.

As for the less than great news, when I rebooted Windows and started up a 3D game, the graphics got a bit distorted and audio ceased (in that game only). I ejected the card and the problem went away. This could be general instability due to the removal of those extra resistors, OR it could also be my instance of Windows (it still has the AMD driver & software installed, and was already nearing its end-of-life as far as a stable system goes).

I plan to try linux and reinstall Windows this weekend. I'll post back if there are any changes from the new installs.

With this being successful I intend to order a second GTX 670 anyways, as well as aftermarket coolers (due for some changes to the system in general). If I were to look at getting a new motherboard any IvyBridge compatible recommendations?

Thanks again David & Gordan for all your help.

Cheers,

~Casey

On Fri, Oct 18, 2013 at 2:00 PM, David TECHER <davidtecher@xxxxxxxx> wrote:

Casey

Back to home. I had a look and yes R2 and R4 are resistors to remove.

I know that you read this thread on eevblog.

You may have a look here

http://www.eevblog.com/forum/chat/hacking-nvidia-cards-into-their-professional-counterparts/msg217534/#msg217534

Click on "Top.png" and "Down.png". I can tell you that R2 and R4 are resistors that I removed.

Hope this helps

Le Vendredi 18 octobre 2013 17h28, David TECHER <davidtecher@xxxxxxxx> a écrit :

Hi Casey,

I am at work for the moment. I will have a look on my card tonight when back to home but the photos I sent in my previous mails should be good

Le Vendredi 18 octobre 2013 15h26, Casey DeLorme <cdelorme@xxxxxxxxx> a écrit :

Back with more info and questions.

I finished reading the thread, and then I took apart my card to find the R1, R2, R3, and R4 components.

@David, I attached photos of the same points as yours, but noticed that R1 appears to be empty, two solder-dots but not resistor? Was yours also empty or are my eyes just not sharp enough? After that, to confirm, you removed R2 and R4 and it changes to a grid k2?

I will probably get some rest tonight and pickup with the project tomorrow evening.

Looking forward to a reply, and favorable passthrough results, and thanks again for all your help.

Cheers,

Casey

On Thu, Oct 17, 2013 at 8:24 PM, Casey DeLorme <cdelorme@xxxxxxxxx> wrote:

Hi Again,

The card arrived, and I am reading through all 40~ pages of eevblog's posts before I do anything.

@David, I recently moved and have an electric stove but no lighters with me. I did however bring a heat gun. Should I use that to heat the knife to remove the resistors?

@Gordan, if I was going to replace the resistors where would I get the supplies from? Not shy about taking a knife to a computer part, but I am certainly no electrician or engineer.

Thanks again,

Casey

On Sun, Oct 13, 2013 at 6:42 PM, David TECHER <davidtecher@xxxxxxxx> wrote:

>I bought the GTX 670 model in David's article, I will be giving this a shot in a week.

It could be done easily because this GTX 670 model has almost the same PCB than the Asus model shown on eevblog forum. Except for a few components installed by manufacturer but it is not taken into account for hardware modification to GRID K2.

>I was hoping to ask a few questions.

>1. Is there a specific qemu version required (traditional or the new default)?

Xen 4.3.0
device_model_version="qemu-xen-traditional"

>2. What (if anything) should be done after removing the resistors (NVFlash to 1/2 GRID K2)?

There is nothing special to do (no bios modification before and after removing components). Just back up your BIOS.

Nothing special to do! I bought this card last 2 weeks ago, unboxed it. I removed resistors directly.

I took my knife (+ fire source) and removed resistors directly. Tweezers should be better! Soldering iron the best choice! Unfortunately I don't have soldering iron.

A knife like this one should be enough http://www.davidgis.fr/download/PICT0226.JPG http://www.davidgis.fr/download/PICT0227.JPG

>if you have any other tips or advice you can send my way that would be great.

Stable hands, good eyes, don't be disturbed...while removing resistors.

Keep it mind that info provided below may be different from what you may get (It depends on your hardware)

Before buying this card I already have existing domUs (with NVIDIA drivers already installed for my previous card). Once this card has been hard-moded and put into my PC

- domU Linux:

It may start directly! You can use the latest NVIDIA driver. This domU was used for my tests with ATI card. So I was able to reused my domU Linux

Just uninstall the ATI/AMD driver, restart the domU, install the NVIDIA driver, restart the domU (classic way!)

- domU Win XP/7 64:

NVIDIA driver 320.XX series works!

Becauser NVIDIA drivers was already installed for my previous card (I think) the first time and only the first time I started those domU I got a black screen (gfx_passthru=1). So I stopped the domUs. Set up gfx_passthru=0 to start the domUs (2nd time). I shutdown my domUs properly. After that I set up gfx_passthru=1 and my domUs were OK ( > 2nd time). Black screen issue went away So you may have this behavior. You may have to set gfx_passthru=0 temporary

I already had another domU Win 7 64 installed with ATI/AMD driver -- used when I was doing my tests with ATI card. If you have a such domU just uninstall ATI/AMD driver, stop the domU, restart it (gfx_passthru=0), download and install NVIDIA driver. Restart the domU (gfx_passthru=1).

Another tips to know:

Hig resolution (either 2560x1440 or 1920x1080) works. Tested on Linux/XP/7
Extended monitor (1srt screen: 2560x1440, 2nd screen: 1920x1080) works (dual link DVI). Tested on Linux/XP
Win XP 64 is limited to 3GB for me! With more RAM my domU XP gets slower.

Until the current domU is restarted/ is the same then there is no problem. Exceptions occured when switching between domUs ("switch" = stop one domU and start another one domU)
switching either from XP to Linux or from Linux to XP is OK.
switching e from 7 to XP you may have black screen.

>Thank you both for all your work, experimentation, learning and passing along new passthrough options.

In my case "experimentation" is the right word for this GTX 670 card. No experience in electronics!
I read eevblog forum entirely. To be honest I was a bit confused for this card. Which resistor to remove? Should I remove all resistors? So let's say that I was ready to sacrifice my GTX 670 card!
For GTX 670 I removed resistor one by one until I got "GRID K2". Once I got it then I stopped removing resistor! Got a stable card for Xen now

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Re: [Xen-users] GTX 670 Tips?