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PSU for quad 7950's or 2 x 7950s and 2 x 7970s - Page 3

post #21 of 39
Unfortunately, If you plan of having Quad 7950 or Quad 7970, and Overclocking everything, I don't think it will be enough for long run.

I would recommend up tp 3 GPUs and a CPU overclock to the max on this power supply.
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post #22 of 39
I just upgraded to Quad 7970s and a Lepa G1600.
post #23 of 39
Quote:
Originally Posted by skyhigh2004 View Post

Do you think that 1350w will be enough for the setup I posted in the OP karlitos? If it is enough I would be very interested in your Enermax platimax 1350w biggrin.gif


You can get away with 1500w give or take with medium/mild overclocks. However, pushing over 5ghz on a hexacore and 4 golden 7970s, and a big ass loop, not even a Lepa 1600 is enough.
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post #24 of 39
Brilliant... I knew there was more than just me thinks you need decent power for tri and quad fire.
I am getting a bit tired of arguing with people about it in the PSU section on here of late. frown.gif
post #25 of 39
Thread Starter 
Quote:
Originally Posted by KaRLiToS View Post

Unfortunately, If you plan of having Quad 7950 or Quad 7970, and Overclocking everything, I don't think it will be enough for long run.

I would recommend up tp 3 GPUs and a CPU overclock to the max on this power supply.

Thanks for being honest man. I've narrowed it down to the Lepa 1600w unit and the enermax 1500w unit. With mail in rebates and shipping costs the Enermax 1500w comes to $3 more lol so I think I'm gonna lean that direction as its very similar to the Lepa model, even sharing most internals but with a few more added parts for voltage ripple and regulation.
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Intel i7 3820 ASUS Rampage IV Extreme MSI TF3 7950 w/7970 PCB MSI TF3 7950 w/7970 PCB 
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OCZ Agility 3 SSD Samsung 22x DVD-RW Custom Liquid Cooling Windows 8 Pro 
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CoolingOSMonitorMonitor
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MonitorKeyboardPowerCase
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post #26 of 39
Quote:
Originally Posted by Stu-Crossfire View Post

Brilliant... I knew there was more than just me thinks you need decent power for tri and quad fire.
I am getting a bit tired of arguing with people about it in the PSU section on here of late. frown.gif

Well, finding some people who would "think" you need more power for anything isn't very hard, as a lot of people either grossly over-estimate a power requirement and/or under-estimate the capability of the PSU in question. On the other hand, it's harder to find those who knows whether or not you need more or not.

I'm not going to go into details regarding the other stuff, but no one had denied that a few heavily OCed 7970s can be very power hungry. In fact, the ones you had argue with had agree that if you wish to quad-fire them, you would want a PSU larger than 1200w. On the other hand, no one seem to agree that it requires a dual PSU setup even among the people in this thread, so it's still just you. tongue.gif
post #27 of 39
Quote:
Originally Posted by qwan456 View Post

Quote:
Originally Posted by Stu-Crossfire View Post

Brilliant... I knew there was more than just me thinks you need decent power for tri and quad fire.
I am getting a bit tired of arguing with people about it in the PSU section on here of late. frown.gif

Well, finding some people who would "think" you need more power for anything isn't very hard, as a lot of people either grossly over-estimate a power requirement and/or under-estimate the capability of the PSU in question. On the other hand, it's harder to find those who knows whether or not you need more or not.

I'm not going to go into details regarding the other stuff, but no one had denied that a few heavily OCed 7970s can be very power hungry. In fact, the ones you had argue with had agree that if you wish to quad-fire them, you would want a PSU larger than 1200w. On the other hand, no one seem to agree that it requires a dual PSU setup even among the people in this thread, so it's still just you. tongue.gif


headscratch.gif


I have to use a 2nd psu whenever I bench with quads.
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post #28 of 39
My post was specifically directed towards Stu in another thread regarding a 2600k / 3770k setup not an SB-E i7-3930k setup. My buds and I had setup and benched on an i7-2600k and quads (all of which overclocked) on the G1600 as well for a short while and haven't had a problem with power. Wish I could try it out again, but I had gifted each components for a few of my buds when I had moved away. Assuming that your situation isn't like Stu and the OCP is being trip off, I'm surprised you ran into a situation where you had to used a second PSU even with that SB-E seeing how Karlitoes had been satisfied with his own G1600. Must have OCed the hell out of it.
post #29 of 39
doubled post
post #30 of 39
Quote:
Originally Posted by qwan456 View Post

My post was specifically directed towards Stu in another thread regarding a 2600k / 3770k setup not an SB-E i7-3930k setup. My buds and I had setup and benched on an i7-2600k and quads (all of which overclocked) on the G1600 as well for a short while and haven't had a problem with power. Wish I could try it out again, but I had gifted each components for a few of my buds when I had moved away. Assuming that your situation isn't like Stu and the OCP is being trip off, I'm surprised you ran into a situation where you had to used a second PSU even with that SB-E seeing how Karlitoes had been satisfied with his own G1600. Must have OCed the hell out of it.


Yea, none of the theirs runs as fast as mine. And exactly as I posted above, there just wasn't enough in the lepa for me to run both max clocks on gpu and cpu at the same time with my loop. It's also annoying how the accessories share with the gpu rails, a bit annoying. The lepa gets me a few mhz higher before shutting off vs the st1500 it replaced. The st1500 is pretty stout itself being able to run that much higher than its rating, but the lepa is soo much shorter so it's sort striking how it can pack so much into a box so small.
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