New computer problem

Run the stress test 5 time, not one system shutdown. I think you guys cracked it!

Fingers crossed it remains stable, thank you so much for your help. I can get some sleep now. :D
 
Happy for you. :)

You owe this man @Vexr a drink.

When you get some rest, and if you didn't see my post about the memory in the other thread - your board has two XMP choices. So rather than setting a frequency, try the XMP choices.
 
Wayne0001 said:
Run the stress test 5 time, not one system shutdown. I think you guys cracked it!

Fingers crossed it remains stable, thank you so much for your help. I can get some sleep now. :D
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Especially overclocked Vegas draw current spikes far above 35A limit reading directly on box and in PSU's sticker:
https://www.kitguru.net/components/power-supplies/zardon/bitfenix-formula-gold-750w-psu-review/2/

And even if there wasn't that current limit, with high performance cards you'll want to use separate cables to minimize voltage losses and fluctuations in card's ground reference.
Using one cable instead of two also quadruples power losses in cable heating it that much more.
(with two cables total power loss is halved)
 
The highest I can set the RAM to without windows blue screening is 2800 CL16-18-18-18-38 at 1.35v

Taking a look at memtest now.
 
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Danny75 said:
Windforce has 6 phases doubled. Nitro+ has 7 phases doubled. With the better cooler, it also keeps the actual chip cooler.

Gigabyte have been naughty claiming more phases without stating half are doublers. As you probably know, there was similar trouble on the motherboard front.
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There no doublers on nitro, just 7 phases

https://www.tomshardware.co.uk/sapphire-rx-vega-64-nitro,review-34125-2.html

Windforce

https://www.tomshardware.co.uk/gigabyte-rx-vega-64-gaming-oc-review,review-34174-2.html

There is no PWM controller on the market that handle more then 8 channels , so vendors have to use doublers. You have 12 phase, 2 each are linked to doublers , they 6 doublers are linked to the controller.

MSI and Gigabyte do the same for their motherboards, X399 MEG from MSI PWM can actually handle quad config, so thats 36 plus phases ....

What Gigabyte got caught out on is using 1 high and 2 low MOSFET to make a phase, technically you need 2 hi + 2 low , or using a fully integrated MOSFET like IR 3555 etc :)

TG said that board should handle 3200hz , tried on Asus and Gigabyte a while ago .
Ryzen ram calculator might help you push 3200hz
 
You know this is probably dirty but of the two cards id take the reference card as (dual bios) and one bios flashed to 64 with 1650/1100 overclock. They perform pretty nicely :) not sure the partner design would make it there.
 
orbitalwalsh said:
There no doublers on nitro, just 7 phases

https://www.tomshardware.co.uk/sapphire-rx-vega-64-nitro,review-34125-2.html

Windforce

https://www.tomshardware.co.uk/gigabyte-rx-vega-64-gaming-oc-review,review-34174-2.html

There is no PWM controller on the market that handle more then 8 channels , so vendors have to use doublers. You have 12 phase, 2 each are linked to doublers , they 6 doublers are linked to the controller.

MSI and Gigabyte do the same for their motherboards, X399 MEG from MSI PWM can actually handle quad config, so thats 36 plus phases ....

What Gigabyte got caught out on is using 1 high and 2 low MOSFET to make a phase, technically you need 2 hi + 2 low , or using a fully integrated MOSFET like IR 3555 etc :)
Click to expand...

It says 7 doubled for Sapphire and 6 doubled for Windforce in those same links:


We count 14 voltage converter circuits instead of just seven, though. What gives? In reality, there are seven power phases that get doubled, thereby distributing load across two circuits per phase.

This so-called doubling is achieved through a total of seven IR3598s located on the back of the board. Voltage conversion for the 14 circuits is handled by one IRF6811 (on the high side) and one IRF6894 (on the low-side) for each circuit. The latter also include the necessary Schottky diode.

https://www.tomshardware.co.uk/sapphire-rx-vega-64-nitro,review-34125-2.html


While Gigabyte implements six power phases with doubling, resulting in 12 voltage converters for the VDDC

...

As with AMD's reference design, the focus is on International Rectifier's IR35217, a dual-output multi-phase controller that provides six phases for the GPU and an additional phase for the memory. But again, there are 12 regulator circuits, not just six. This is a result of doubling, allowing the load from each phase to be distributed between two regulator circuits.

https://www.tomshardware.co.uk/gigabyte-rx-vega-64-gaming-oc-review,review-34174-2.html
Click to expand...
 
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