Will my power supply power a R9 295x2?

[EarthDog]

A lot of those 'nopes' weren't based of of facts though...a quality 750W single rail PSU would be fine to run that card (just not overclocking it and the CPU to their ambient limits consistenly - as I said I did it with my G2 and pulled the 750W rating while benchmarking - but a mild overcock all around is plenty)...it just so happens that his is a TRUE multi rail PSU with OCP on it (versus just what the "label" says which is sometimes misleading if you read power supply reviews.

 

[Solaris17]

A lot of those 'nopes' weren't based of of facts though...a quality 750W single rail PSU would be fine to run that card (just not overclocking it and the CPU to their ambient limits consistenly - as I said I did it with my G2 and pulled the 750W rating while benchmarking - but a mild overcock all around is plenty)...it just so happens that his is a TRUE multi rail PSU with OCP on it (versus just what the "label" says which is sometimes misleading if you read power supply reviews.

I wouldn't go that far your assuming you are not the only one that did not realize it was a G1. Nor do you know how he planned to use the system. You are inferring that they were baseless responses when you are also making baseless responses which more or less render your opinion invalid. Without most of the information the members were making decisions based on a worst case scenario where the OP was planning on over clocking the card and the rest of his system and probably assuming that he would like to expand at a future date. All of these things combines are an assumption made again by the members based on the information that was provided.

In which case they all came to the self same conclusion that given a worst case scenario the system PSU chosen would NOT work with his configuration. Which ended up being the case this form of thought process is called an educated guess and happens when dealing with non technically inclined members who provide little to no relevant information as well as people who don't have companies giving them equipment to test or thousands of dollars to spend on testing equipment since most are not part of the privileged few that can spend this kind of money and post about on forums like their opinions are immediately valid.

 

[EarthDog]

You make good points. But I am a betting man and I would bet most just went by the high level '750W'.

We can all make examples for this not to work. I would think my system is bordering on a 'worst case' type environment with an overclocked 140W hex, and overclocking the tar (to the edge of stability not daily driving) that GPU, not to mention water cooling, a couple of SSDs, HDDs, and 6 fans (I know the water/ssd/hdd/fans aren't much).

That said, with the kind of money he has available, I agree with your eventual conclusion of room for upgrading as there wouldn't be much in a lot of cases.

 

[buildzoid]

You make good points. But I am a betting man and I would bet most just went by the high level '750W'.

We can all make examples for this not to work. I would think my system is bordering on a 'worst case' type environment with an overclocked 140W hex, and overclocking the tar (to the edge of stability not daily driving) that GPU, not to mention water cooling, a couple of SSDs, HDDs, and 6 fans (I know the water/ssd/hdd/fans aren't much).

That said, with the kind of money he has available, I agree with your eventual conclusion of room for upgrading as there wouldn't be much in a lot of cases.

Hit your system with a Unigine and a multi core CPU benchmark and it still won't shutdown because OCP typically trips 10% above the rating of good PSUs. Mine for example has each rail rated at 30A but the OCP is set well above that so my my 3960X does not trip the OCP while at 5.3Ghz with 1.725V running Cinebench R11.5. I don't have a watt meter but at those setting it should be pulling about 440W which is 22% above the rating of the rail it's on. Also my R9 290X also hasn't managed to trip my OCP and I was bennching at 1.4V with 1200mhz core and 1500+mhz VRAM. I think the OCP trips after 40A onn my PSU but I can't find where I read that

 

[EarthDog]

I have drawn 900W at the wall with that PSU many times for a few minutes at at time benchmarking in cold weather (Supernova G2). Thing is a BEAST.

 

[Dominates]

Still thinking hard of doing it. Im really confused because some people said yes and other said no. Maybe if i underclock the cpu it will work out?

 

[newtekie1]

Why would you underclock your CPU just to use an GPU that is too power hungry? Why not pick a better option for you system like SLI GTX970s? Two 970s would be cheaper and consume a heck of a lot less power and perform the same or better and there'd be no chance of issues with your PSU.

 

[EarthDog]

Still thinking hard of doing it. Im really confused because some people said yes and other said no. Maybe if i underclock the cpu it will work out?

There problem is with the way your psu is divided on the 12v rails. In this case, underclocking the cpu wouldn't matter as there isn't enough amperage to drive the gpu because of how it's divided.

Why this monster card in the first pace? You running 4k? 3x monitors? I mean, what is the NEED regardless of the deal? Anything 2560x1440 or less easily work with a 290 or a 970 and I doubt you are getting that card for ess than $350.

 

[buildzoid]

He could try using one of those 2x6pin to 1 8pin adapter to get 3 rails to feed the GPU.

 

[Dominates]

He could try using one of those 2x6pin to 1 8pin adapter to get 3 rails to feed the GPU.

Wait, what? How do you do that?

 

[EarthDog]

Its an adpater, like he said.

 

[Dominates]

Can you link me to one? that should help feed the gpu?

 

[EarthDog]

http://www.ebay.com/itm/Dual-6-Pin-...n_Power_Cables_Connectors&hash=item2c92062f2d
Not sure I would do that though...

Again I ask, why the 295x2? For what resolution? I sure hope AT LEAST 2560x1600 or x3 1920x1080 or 4K. Otherwise, no matter how cheap it is (well, how cheap? You never mentioned) its a waste of cash.

 

[Tonduluboy]

how much the 295x2 price?
In my place this card price still expensive selling at $1500, i dunno how the pc stores going to sell this because 2 gtx 980 is still cheaper than 1 295x2...

 

[newtekie1]

http://www.ebay.com/itm/Dual-6-Pin-...n_Power_Cables_Connectors&hash=item2c92062f2d
Not sure I would do that though...

That wouldn't help anything. He would still only be using 2 rails. All of the pci-e power connectors on his PSU are connected to just 2 rails. The 6-pins and 8-pins all run off just 2 rails.

 

[EarthDog]

I thought someone mentioned it was a quad rail PSU, LOL! This is not my thread, LOL!



EDIT: Wait, it is? http://www.evga.com/Products/Product.aspx?pn=120-G1-0750-XR

Sooooo, if he used two of those adapters (which would then span all the rails) he would have 40A each...

While AMD says it needs 50A from each plug, doing the math on that doesn't add up, does it? As that is 1200w, LOL!

I don't think its a good idea, but I think I am missing something. Its a dual rail, but the label says four I suppose is what you are saying. But if it has 20A OCP on each dual rail, that is only 480W total on the 12v rails (x2)

 

[15th Warlock]

Just to reiterate, you risk overloading your PSU when your system is at full load during gaming, better get something with a bit more juice.

 

[claylomax]

Good news and bad news. It will trigger your psu OCP and the computer will shut down; you won't be able to use your card. Been there, done that.

 

[fullinfusion]

I have drawn 900W at the wall with that PSU many times for a few minutes at at time benchmarking in cold weather (Supernova G2). Thing is a BEAST.

I pulled over a KW from the wall with my 7970's on a corsair HX 850 and it died a slow death shortly after. Thus why I went to a G2 1300 PSU and never turned back

 

[buildzoid]

I thought someone mentioned it was a quad rail PSU, LOL! This is not my thread, LOL!



EDIT: Wait, it is? http://www.evga.com/Products/Product.aspx?pn=120-G1-0750-XR

Sooooo, if he used two of those adapters (which would then span all the rails) he would have 40A each...

While AMD says it needs 50A from each plug, doing the math on that doesn't add up, does it? As that is 1200w, LOL!

I don't think its a good idea, but I think I am missing something. Its a dual rail, but the label says four I suppose is what you are saying. But if it has 20A OCP on each dual rail, that is only 480W total on the 12v rails (x2)

I was thinking he could hook up 3 different Rails but that PSU doesn't even have labels for which connectors are which rail so this will definetily not work

 

[EarthDog]

I pulled over a KW from the wall with my 7970's on a corsair HX 850 and it died a slow death shortly after. Thus why I went to a G2 1300 PSU and never turned back

What, 3 of them?

 

[fullinfusion]

What, 3 of them?

No two MSI OC edition reference cards

somewhere in this site i posted a picture of the power draw I was using last winter overclocking the entire system

 

[newtekie1]

I thought someone mentioned it was a quad rail PSU, LOL! This is not my thread, LOL!



EDIT: Wait, it is? http://www.evga.com/Products/Product.aspx?pn=120-G1-0750-XR

Sooooo, if he used two of those adapters (which would then span all the rails) he would have 40A each...

While AMD says it needs 50A from each plug, doing the math on that doesn't add up, does it? As that is 1200w, LOL!

I don't think its a good idea, but I think I am missing something. Its a dual rail, but the label says four I suppose is what you are saying. But if it has 20A OCP on each dual rail, that is only 480W total on the 12v rails (x2)

Again, still wouldn't work. His PSU is a quad-rail design, but only two of the rails are connected to the PCI-E plugs. It is just a shit design, IMO.

VGA1 and VGA2 run of the 12v2 rail. VGA3 and VGA4 run off the 12v4 rail. 12v1 is dedicated to the CPU 8-Pin and 24-Pin. 12v3 is dedicated to the SATA and Molex connectors.

 

[MxPhenom 216]

It should be fine. Those EVGA units are some of the best on the market currently. I just question why a 295x2?

Unless you can get one for A LOT cheaper then say 2 GTX970s, go for it.

EDIT: Wait, those SuperNova G1 units were pretty meh iirc. I know that EVGA first gen of SuperNova, or something, had a pretty bad rep.

 

[RadFX]

I pulled over a KW from the wall with my 7970's on a corsair HX 850 and it died a slow death shortly after. Thus why I went to a G2 1300 PSU and never turned back

I ran a 7970ghz, and two R9 280's on an OCZ Fatality 1000w for 2-3 months and it's still kicking. Here's the deal though:

1.. 7970ghz was underclocked/undervolted to 1.094v down from 1.256v.
2. Both R9 280's were overclocked but left at stock voltage which was 1.168v

This was mining rig running 16 hours a day, so it was constraint stress. It was my main rig too with the AMD Fx 9370 in it but I had that set not to go over 1.4ghz most of the time unless I needed it to for whatever reason.

Since then (end of July this year) I've been running the Gigabyte Radeon 7970ghz at stock voltage 1.256 and one R9 280 at 1.1ghz and 1.5ghz ram at stock 1.168v.



So bottom line, would I try it yes, but I would also have another PSU on order in the meantime.

As mentioned you could fry your psu and it could take out parts of your system. Your psu itself might just cause your system to crash at which point you'd know it was inadequate or it could die a slow death.