Question 700W PSU Not Enough?!

ibex333

Diamond Member
Mar 26, 2005
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My new system is:

700w Thermaltake 80 PLUS PSU
AsRock 5600XT
Ryzen 5 3600

So with only one M.2 NVME SSD the system boots fine. As soon as I add 3 more SSDs(2.5inch) the system no longer has any video. ALL Lights on, ALL fans spinning, but fans on video card do not spin(even though video cards RGB lights are on)

if I unplug all SSDs the system has video and boots. Plug them back, NO VIDEO again. I mean... Seriously? Really? 3 SSDs push the power requirements of the system over the edge? That makes no sense... There must be a different reason.

All components are band new.

Please help.
 

VirtualLarry

No Lifer
Aug 25, 2001
56,570
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Guessing maybe some sort of secure-boot issue, if it's not a PSU '/ power issue?

Can you add the SSDs one at a time to see? Or are they all part of a big array? Maybe just one of them is "bad".

Or it could be related to the boot order. SATA often comes BEFORE NVMe, by default, in the boot order. Make sure that your NVMe support is Enabled properly, and Fast Boot is Disabled, and you might want to outright disable CSM Mode. Then make sure that your NVMe drive is FIRST in boot device order.

The GPU fans not spinning may or may not have anything to do with the issue, if that card is a "Zero RPM fan speed at low temp" card.

Edit: And when you say "no video" - do you mean no video in Windows, or no POST video either? What happens if you bang on DEL on keyboard to get into BIOS? And then unplug and re-plug HDMI cable. Are you in BIOS, or is it still a black screen? Can you hit NumLock and CapsLock, and watch the LEDs on your keyboard blink on and off as you press those keys? (That would indicate that the CPU isn't hung, and that it is processing interrupts / SMM Mode.)
 
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fralexandr

Platinum Member
Apr 26, 2007
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If it's a thermaltake smart 700w, it should have no problem running that. From newegg +3.3V@24A, +5V@17A, +12V@54A, -12V@0.5A, +5VSB@2.5A.
That's ~80w on the 5v rail and ~80w on the 3.3v rail.

At the bottom of the first page someone stress tested it with 2x 580 gtx and posted some results. Not a high end psu, but that's probably to be expected.

that said there have been some cases where putting unexpectedly high or unbalanced loads on a psu brings the 3v or 5v rails out of spec. The stress test posted on the jonnyguru forums puts the 5V at 5.27V during their stress/high load scenario which is slightly greater than the max 5.25V allowed by ATX specifications, though I'm guessing that's when stressing the 12V rail since he doesn't mention adding any additional drives.
 
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