Black screens: 750W not enough for R9 390X and FX-9590 @ 4.7 GHz?

[Jon93]

Hi!

I just upgraded my GPU and MB from [1] to: [2]

I learned afterhand that the old MB didn't support the 220 TDP CPU but I was still able to use it at 4.6 GHz. Now I figured I'd get the 990FX R2.0 (which is said to support the 220 TDP) just to get the extra juice out of the FX 9590 and the 5 GHz turbo.

TL;DR: The problem is that I can't get the new system to run even above 3.5 GHz now without resulting in a black screen after a minute or two or whenever I mess with the "overclocking" in Catalyst control center.

I figured maybe my PSU just isn't up to the task even though I used http://powersupplycalculator.net/ to calculate the minimum wattage at approximately 720W for my system (the 390x wasn't available so I used the 290x instead in the calculator and it has 10% higher TDP). I'm going to try switching back to the R9 280 soon to see if I can put the clock speed higher with that without black-screening.

Or is there something else that might be the problem? Any help is appreciated. Thanks!

[1]
CPU: FX-9590
GPU: XFX R9 280 DD 3GB
MB: Gigabyte GA-970A-DS3P
PSU: Cooler Master: G750M
RAM: 1x BallistixSport 4GB 1600MHz, 2x (some old memory sticks I do not recall the name of)

[2]
GPU: Sapphire R9 390X Tri-X OC 8GB
MB: Sabertooth 990FX R2.0
Case and Cooling: CM Storm Scout II Advanced Gaming with Noctua NH-D14 for the CPU.

Same specs otherwise (except the two old memory sticks that didn't appear to work with the new MB [uneven number])

 

[Karadjgne]

Kinda like slapping a 428SCJ in a 1800lb fiberglass fishbowl and calling it a Shelby Cobra. Heh I understand analogies

 

[Rookie_MIB]

Actually I think a more apt analogy would be:

Mobo = Honda 4cyl VTEC.
CPU = Panzer VIII Maus

Expecting the Mobo to power the CPU means the mobo is going to have a rough time...

 

[Jon93]

But it happens with both processors... So it makes no sense at all...

And even the 9590 worked for over a year with the previous MOBO (which is compatible with it, just with reduced power output to the CPU, pretty much turning it into a 8370). And why wouldn't the 990FX R2 be able to handle it when it specifically has the 9000-series chipset logo on the box??

So what can I do at this stage? Return the 990FX for repair (apparently ASUS doesn't give replacements*) and hope that it holds up the second time??

* "Yes i recommend that you contact your store and return the card there for rma processing as we offer no direct replacements for motherboards."

 

[Rookie_MIB]

But it happens NOW with both processors... So it makes no sense at all...

Fixed that for you. The problem is obvious, the FX-9590 is burning out your mobos.

The 9590 worked in the old mobo.
You put the 9590 in the new mobo.
New mobo no worky.
Put the 9590 in the old mobo.
Old mobo stopped working with 9590.
Old mobo no longer works with older CPU.

Thus - old mobo is fried.

 

[Bossyfins]

Honestly, I'd return the board, get your money back, sell the 9590, get an 8350, a 970a-ud3p, and OC that. Less heat, less voltage, much stabler. But that may not be the most economical

 

[Jon93]

But it happens NOW with both processors... So it makes no sense at all...

Fixed that for you. The problem is obvious, the FX-9590 is burning out your mobos.

The 9590 worked in the old mobo.
You put the 9590 in the new mobo.
New mobo no worky.
Put the 9590 in the old mobo.
Old mobo stopped working with 9590.
Old mobo no longer works with older CPU.

Thus - old mobo is fried.

Nope. Old MOBO is working again when I paired it up with the old GPU, CPU, and PSU in the old case. So I doubt the 9590 fried it, and I doubt that it fried the new one as well. Again it makes no sense when the CPU doesn't even reach 40 C.

Unfortunately now I have run out of thermal paste so can't try anything for a while. I will send the 990FX back and see if the repaired one will work.

 

[CTurbo]

Either way. I would 100% get rid of the 9590. It's only going to cause you more trouble. You would be so much happier with a FX8320, 8350, or 8320e, and you would get better performance too.

 

[Outlander_04]

A new pc would likely start in a failsafe mode with the cpu clocked to its lowest speed state . Maybe as low as 1400 MHz .
While many of the comments about the cpu are close to the mark its not reasonable to expect the high power requirement to stop the first boot .

I suspect strongly that the RAM is the issue . Its some old RAM . It may even be 1.8 volt DDR3 which would likely cause an instant failure even in BIOS .
Buy some new RAM . 1600 or 1866 Mhz and 1.5 volt . That is likely to get the PC running .
After that you can decide to keep the cpu at stock clocks based on heat and current draw , or whether to back off a little

 

[Jon93]

A new pc would likely start in a failsafe mode with the cpu clocked to its lowest speed state . Maybe as low as 1400 MHz .
While many of the comments about the cpu are close to the mark its not reasonable to expect the high power requirement to stop the first boot .

I suspect strongly that the RAM is the issue . Its some old RAM . It may even be 1.8 volt DDR3 which would likely cause an instant failure even in BIOS .
Buy some new RAM . 1600 or 1866 Mhz and 1.5 volt . That is likely to get the PC running .
After that you can decide to keep the cpu at stock clocks based on heat and current draw , or whether to back off a little

I did upgrade to a newer RAM (HyperX 8GB 1866 MHz) along with the new PSU (see one of the later comments). Tried both my old ones and the new ones with the same problem. So it's unlikely that they're the problem (especially since I'm using the older ones now as I type this). The 990FX is definetly faulty. But I'm uncertain if that's the only thing that's the problem.

 

[Jon93]

Either way. I would 100% get rid of the 9590. It's only going to cause you more trouble. You would be so much happier with a FX8320, 8350, or 8320e, and you would get better performance too.

Again I've had no problems with it for over a year and it is unlikely that it would be causing any issues on the same setup now when I meet its requirements. As for performance, I have no idea how you can say that given the significant almost 1GHz difference. But I digress because I'm not going to buy another CPU either way when this one has been and probably still is working fine.

 

[Jon93]

As it turns out; I was a stupid idiot all along... Forgot the standoffs for the new case.... I was so used to not having to put standoffs in with my old case that I entirely forgot it in the new one which appears to have short-circuited the first mobo. And when I turned it in and got a new one I fried that one as well immediately when turning the computer on... So... I got lucky... and got yet an even new one now for free...

Now... I guess I should watch a build tutorial or something so I don't forget anything else this time..... -___-


EDIT: Now everything is working fine with the new parts.