Just a prevention...

[MarcoAzarmaneche]

Hey guys. A few weeks ago I built my system: 5960x, 64gigs of DDR4, SLI 980ti, Rampage V Extreme fully watercooled, ax1500i psu. 

 

So I oc'd my cpu about 20% and I am planning on doing that on the 2 gpus.

Can I do that ? I mean will I have enough power - TO MENTION: I am using, for each psu, a daisy chained pcie power cable - you know, those 8 pin-8 pin onto one cable. So I am using one of those for each gpu and I was wondering if it is ok to do that.

 

Thank you alot guys !

[Low_Battery]

5 minutes ago, MarcoAzarmaneche said:

Hey guys. A few weeks ago I built my system: 5960x, 64gigs of DDR4, SLI 980ti, Rampage V Extreme fully watercooled, ax1500i psu. 

 

So I oc'd my cpu about 20% and I am planning on doing that on the 2 gpus.

Can I do that ? I mean will I have enough power - TO MENTION: I am using, for each psu, a daisy chained pcie power cable - you know, those 8 pin-8 pin onto one cable. So I am using one of those for each gpu and I was wondering if it is ok to do that.

 

Thank you alot guys !

I think that kind of defeats the purpose of having two power inputs on the GPU, and even if it does run, you should have two separate PCIE cables to each GPU, especially if you are going to OC.  Your power supply should have more than enough to run it that way, so not sure why you wouldn't...

[MarcoAzarmaneche]

Just now, Low_Battery said:

I think that kind of defeats the purpose of having two power inputs on the GPU, and even if it does run, you should have two separate PCIE cables to each GPU, especially if you are going to OC.  Your power supply should have more than enough to run it that way, so not sure why you wouldn't...

But if it does run, even in stress testing, that is perfectly fine, right? Or it would underclock so it has enough power ?

[STRMfrmXMN]

Just now, MarcoAzarmaneche said:

But if it does run, even in stress testing, that is perfectly fine, right? Or it would underclock so it has enough power ?

You could run 6 980tis off 1500W.... You're fine.

[MarcoAzarmaneche]

Just now, STRMfrmXMN said:

You could run 6 980tis off 1500W.... You're fine.

No, that's not what I mean. I know the PSU is capable, but can I use only one pci-e cable, split into two for each graphic card ? I'm asking that so I don't overdraw from the port !

[Low_Battery]

3 minutes ago, MarcoAzarmaneche said:

But if it does run, even in stress testing, that is perfectly fine, right? Or it would underclock so it has enough power ?

I am not going to say that it is perfectly fine...I mean the company that engineered it put it there for a reason, and having less power draw would be a positive selling point, so you would think they would use less power inputs if they could.  For instance, they probably have the power divided to go to separate parts of the card, and while it may work with only one plugged it, it may be that another part of the card is having to work overtime or less efficiently to make up for that, which will result in overall failure sooner. This is just speculation though, but I personally wouldn't be too concerned with at least running some tests and seeing if it throttles or is unstable.  If it runs fine, and you are OK with gambling that amount of money by running it with less power, then go for it...

 

[STRMfrmXMN]

Just now, MarcoAzarmaneche said:

No, that's not what I mean. I know the PSU is capable, but can I use only one pci-e cable, split into two for each graphic card ? I'm asking that so I don't overdraw from the port !

Oh, I should imagine you'll be fine as you're stressing all the same rails as you would be with separated cables. Just make sure you have all the proper connectors on one cable. I'm not sure why you wouldn't just use two cables exiting the PSU anyways?