ASUS P8Z68-V Pro - cannot disable 2500k iGPU

[Scoob]

Hi all,

I flashed the BIOS on my P8Z68-V Pro motherboard the other day to take advantage of a stability fix that was released. Board works fine however this BIOS update appears to have enabled my 2500k's iGPU!

Now, I've gone through all the options but, with the 3402 BIOS, there isn't one to simply Disable the iGPU. Problem is that this seems to be upsetting my SLI config and my 2nd 570 has disappeared. It's possible the 2nd 570 has a fault of course, but why by iGPU insists on being active I have no idea.

After the BIOS flash things did seem fine for a while, though I noticed the extra iGPU options being enabled - but NO extra device in windows. SLI was working, but after one boot my system threw a wobbly and presented me with One 570 and one "Standard VGA adaptor". I thought the 2nd 570 had gone kaput but, using tools such HWiNFO32, I can see that the "Standard VGA Adaptor" is in fact my iGPU.

Any ideas? I'm concerned my iGPU being enabled is breaking my SLI set up...but why would it enabled if one of my 570's genuinely had a problem?

I are a bit confuzzled by this.

Any help appreciated!

Scoob.

 

[Scoob]

No one with any ideas then?

I'm still stuck here, my iGPU remains enabled and I think it might be affecting my actual discrete GPU's as only one will work. It might be dodgy, but I cannot tell with the iGPU kicking in all the time.

*sigh*

Scoob.

 

[yassarikhan786]

Maybe a CMOS reset is your only option?

 

[Scoob]

Maybe mate.

I am currently draining my loop to swap the GPU's over to prove it's not a weird slot 1 problem. If, post swap, I still just have the one 570 working AND it's the one that's always been working but now in the top slot, then I think it's a genuine GPU issue.

I did wonder, if the CPU thinks that I've NOT put a GPU in slot 1 (reporting tools say this is empty, when it's not) then maybe it enables the iGPU by default. Sounds like a stupid way to do things, but I'd not be surprised.

I just wish I had this issue BEFORE I water cooled everything as swapping GPU's is a real mission now!

I have my eye on two 670's and two new blocks if a GPU has failed....gonna hurt, but i NEEDZ my PC! lol

Cheers,

Scoob.

 

[Timeless]

Google gave me this:

In bios go to Advanced -> System Agent Configuration.
Then set Initiate Graphic Adapter to PCIE/PCI.
And set iGPU Multi-Monitor to disabled.

Don't have an ASUS board so not sure if you already did this but maybe it helps.

 

[Scoob]

Well, I took the working 570 from the lower slot and placed it in the upper slot, I did not fit the 2nd (suspect) 570 in the lower slot.

Loop re-filled, quick leak test (I trust my work, maybe foolishly) and PC is back on. During post it did get confused for a bit, but I guess it was just adjusting to the hardware swap around.

The GOOD news is that PCI-E Slot one is good and working with the known good 570. The better news is that with Slot 1 now working the iGPU on my 2500k has disabled its self. So, that at least was what I suspected.

Now all that remains is for me to test the currently removed 570 in the lower slot. However, I now suspect I've lost a 570 - which is a pain having forked out really rather a lot to water cool the system.

Options open to me, if the 2nd 570 is dead, is to run just the one GPU for the time being - still far from a poor performer on it's own. Ultimately though, I think a pair of 670's and blocks are in order though that would cost me near my entire WC spend once again! Yikes.

Ah well, shit happens.

Sensible choice would be to try to source a replacement 570. However it would need to be one of the original reference designs, rather than the revision 2 "HD" as the block is for the former. Would be far far cheaper...

Cheers,

Scoob.

 

[Scoob]

Google gave me this:

In bios go to Advanced -> System Agent Configuration.
Then set Initiate Graphic Adapter to PCIE/PCI.
And set iGPU Multi-Monitor to disabled.

Don't have an ASUS board so not sure if you already did this but maybe it helps.

Hi Timeless,

Sorry, I was writing my last post when you posted this.

Good suggestion, but it was the first thing I checked. Seems that with my Asus board, or indeed maybe it's a Sandy B. thing, that if no GPU is detected in PCI-E Slot 1, then the iGPU will be enabled. Period. I.e. it's on, it's staying on, and there's bugger all you can do about it lol.

Hopefully my post above makes things clear.

Still have a likely dead 570 tho. Bollox. Lol.

Scoob.

 

[yassarikhan786]

Sorry about the possible dead 570 . Is it the second 570 you purchased that could be dead or is it the first 570?

 

[Scoob]

Hi mate,

Thanks. This is my original 570, bought on the week of release, so it's done me well. The 2nd 570, which I bought 2nd hand from Ruthless Villan (I think just Ruthless now) is still going strong.

It's a double shame as that original 570 needed a fair bit lower vCore for overclocking etc. and ultimate SLI OC was held back by the newer card. Still, like I said, shit happen.

I am lucky that even with a single 570 the machine is still fairly potent, though I daren't run Skyrim with my insane settings just yet lol.

One odd thing I did spot, with a single GPU in the loop my CPU temps are HOTTER. However ambient is particularly high in this room at the moment, so I'll put it down to that.

Cheers,

Scoob.

 

[yassarikhan786]

Oh right, at least the first 570 has lasted a while, which is good. You've got a good excuse to upgrade to 670's now, but as you've said it will be very pricey with the blocks and all.

The weather has been particularly good the past couple of days so temps will be running a little hotter than usual

 

[Scoob]

Yeah, I've had good service from it.

I think what I will most likely do is get a 2nd 570, but a newer "HD" one (my dead one is an original rev 1 non-HD remember) and get a block for it. That way at least I'll have matching cards and matching blocks, which will make SLI easier. I have a "custom" parallel flow SLI pipe config at the mo, which is a pain when I have to dismantle.

Basically around £270 (GPU + Block) should see me back to where I was. A lot for sure, but a hell of a lot less than a pair of blocked up 670's! Does mean that my entire water cooling project has cost me over £1,000 pounds though. Ouch.

Cheers,

Scoob.