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Higher end z490 - why no iGPU support?

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post #1 of 17 (permalink) Old 05-24-2020, 06:18 AM - Thread Starter
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Higher end z490 - why no iGPU support?

Hi All,

It appears that higher end Asus boards (Apex, Formula, Extreme) and MSI ones (Godlike, MEG ACE, MEG Unify), do not support the VCCGT power line and do not have any video out ports.

Does anyone know the reason behind this? Does it improve the CPU power delivery in any way? Cheaper MSI/Asus boards all can make use of iGPU, just like all other brands across their whole board ranges.

https://docs.google.com/spreadsheets...-2Q/edit#gid=0

For me personally this is a bummer since you can't use your iGPU as a backup for your dedicated graphics card. You can't even use USB C as a video out either or use the iGPU in GPGPU mode.

I was planning to get MSI Z490 Unify as it looks really solid at the mid-price point (for Z490 price range that is).

Thanks!
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post #2 of 17 (permalink) Old 05-24-2020, 07:41 AM
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Quote: Originally Posted by Majek View Post
Hi All,

It appears that higher end Asus boards (Apex, Formula, Extreme) and MSI ones (Godlike, MEG ACE, MEG Unify), do not support the VCCGT power line and do not have any video out ports.

Does anyone know the reason behind this? Does it improve the CPU power delivery in any way? Cheaper MSI/Asus boards all can make use of iGPU, just like all other brands across their whole board ranges.

https://docs.google.com/spreadsheets...-2Q/edit#gid=0

For me personally this is a bummer since you can't use your iGPU as a backup for your dedicated graphics card. You can't even use USB C as a video out either or use the iGPU in GPGPU mode.

I was planning to get MSI Z490 Unify as it looks really solid at the mid-price point (for Z490 price range that is).

Thanks!
Looks like the spec sheet shows the MSI Godlike as having an iGPU rail but there's no iGPU port on the board. Is that an error?

Anyway I'm assuming the reason for this is because of the number of phases the voltage controller can access is limited. If you have all 8 (16) phases for a CPU, (even if doubled from 8), the voltage controller would not be able to address a GPU phase.

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post #3 of 17 (permalink) Old 05-24-2020, 01:49 PM
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Quote: Originally Posted by Falkentyne View Post
Looks like the spec sheet shows the MSI Godlike as having an iGPU rail but there's no iGPU port on the board. Is that an error?

Anyway I'm assuming the reason for this is because of the number of phases the voltage controller can access is limited. If you have all 8 (16) phases for a CPU, (even if doubled from 8), the voltage controller would not be able to address a GPU phase.
In addition it removes all the traces required for it from the PCB so they can be optimized more for CPU.

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post #4 of 17 (permalink) Old 05-24-2020, 03:22 PM
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Actually, Godlike has an VCCGT phase, you can still use Intel QuickSync, but without an output on rear IO, graphic can not be delivered from GT.
I myself prefer a Mobo with iGPU functions, therefore I would choose M12H over Unify/Ace.
And as everybody knows, the LGA1200 would be compatible with next gen Intel Rocket Lake-S, which has a huge upgrade of it's iGPU to an brand-new Xe archetchure with far more EUs——the important thing is, the SPECs for VCCGT would be 50A, which makes 1-phase-weak-VCCGT Mobos difficult.
For example, Aorus Master has a phase of VCCGT only rated for 50A.
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post #5 of 17 (permalink) Old 05-24-2020, 03:32 PM
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Quote: Originally Posted by Cxxcc View Post
Actually, Godlike has an VCCGT phase, you can still use Intel QuickSync, but without an output on rear IO, graphic can not be delivered from GT.
I myself prefer a Mobo with iGPU functions, therefore I would choose M12H over Unify/Ace.
And as everybody knows, the LGA1200 would be compatible with next gen Intel Rocket Lake-S, which has a huge upgrade of it's iGPU to an brand-new Xe archetchure with far more EUs——the important thing is, the SPECs for VCCGT would be 50A, which makes 1-phase-weak-VCCGT Mobos difficult.
For example, Aorus Master has a phase of VCCGT only rated for 50A.
interesting so if I wanted to be more future proof...Asus Hero or Master? What do you think? I don't need the iGPU output but would like to use Quicksync some times.

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post #6 of 17 (permalink) Old 05-24-2020, 03:56 PM
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Hi,
Some do some don't have onboard graphic's :/

Wondering which one to buy now
Wait 30 days for a XII apex or buy now a XII formula either one coming from amazon not newegg

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post #7 of 17 (permalink) Old 05-25-2020, 09:39 AM - Thread Starter
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Thank you for your insight, guys! This is a bummer.

I can get over the lack of video out ports and just buy some old video card for the periods of time when I waiting for next gen GPUs etc. But the lack of VCCGT line is more difficult, especially with the Rocket Lake iGPU upgrade in mind which I did not think about.

And based on Cxxcc's post, Aours Master is not a good option either because of the weak 50A VCCGT MOSFET. I was only considering the Unify or the Master.

So what is a good board to buy for 10900k? Z490 Hero XII is too expensive for me.

I feel like cancelling my pre-order for 10900k and Unify with Zen 3 and Rocket Lake around the corner and this whole Z490 motherboard mess. But then again with my 5 last CPU gens I have always bought a new mobo anyway, so maybe the lack of VCCGT on Unify is not such a big deal...
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post #8 of 17 (permalink) Old 05-25-2020, 09:47 AM
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I didn't even think about this with my ASUS Extreme + 10900k. Yep, it looks like some boards are omitting the port. ASUS does seem to have the better Z490 boards right now quality wise and of course BIOS wise.

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post #9 of 17 (permalink) Old 05-25-2020, 10:09 AM
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Quote: Originally Posted by ThrashZone View Post
Hi,
Some do some don't have onboard graphic's :/

Wondering which one to buy now
Wait 30 days for a XII apex or buy now a XII formula either one coming from amazon not newegg
I'd wait for the Xpex. I'm never buying a formula again

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post #10 of 17 (permalink) Old 05-25-2020, 10:18 AM
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Quote: Originally Posted by Shawnb99 View Post
I'd wait for the Xpex. I'm never buying a formula again
Hi,
Too late
Bought the formula last night free amazon returns if it doesn't go well get it this weekend

Looks like buggy asus beta bios is the worst but how is that different than all first releases

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