Wierd relation MB-PSU

[cuchu]

Hi everyone,

 

I have the most weird problem.

 

On the first place, I have a Rampage III formula with a i7 950 with a Sentey GPS-1000w psu. Some time ago, the system start to shutting down when I start a 3D app, randomly, sometimes it shutsdown and sometimes doesn't. But on the last week every time I launch a 3D app, games/benchmark, alllways shutsdown. I have a gtx 770, also I try a gtx 560ti, but did the same.

 

At first I thought that was my psu, and I tried another, but works perfect, so I think that was the psu. But when I try my psu on another system it works perfect too, like nothing.

 

So I have a system A with a MB A and PSU A, another system B with a MB B and PSU B. The second system is a I5 4460, with the same gtx 770

 

I put the PSU A on MB A, doesn't work.

I put the PSU B on MB A, works.

I put the PSU A on MB B, works.

I put the PSU B on MB B, works.

 

I start to think that my PSU and MB have a bad relationship .

 

Thanks in advance.

[VinZie]

Super strange, never heard of this before. Have you tried jump starting?

[LienusLateTips]

Ok, what PSUs are these?

[-rascal-]

i7-950 is a higher power consumption chip compared to the i5-4460.

I am suspecting the Sentey PSU is acting up.

 

By the way, how old is that Sentey PSU of yours?

What is the other power supply in your "System B"?

[cuchu]

The second psu it's a Sentey SDP650W.

 

VinZie, also I tried only the 24 pin connector of the 650w psu, and every else from the 1000w and works perfect.

 

LineusLateTips, it's this model but of 1000w https://www.hardwaresecrets.com/sentey-golden-steel-power-850-w-power-supply-review/

 

-rascal-, I know the power difference of both cpus, but the stress test on the little oced 950, the 1000w psu works perfect, the problem it's when I launch some 3D app. I start to think it was some software related problem, but I reflash the bios on the gpu, the motherboard, I use a fresh OS with only the gpu driver and nothing, I install the lastest drivers, and the same result. But with the 650w psu work perfect, I don't know. The 1000w has 6-7 years old, and the orther around 5 years.