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Discussion Starter · #1 ·
Post here if you have a penchant for getting maximum performance out of the lowest amount of watts, undervolting your parts while squeezing maximum performance out of them! If you have a low-watt efficient Power Supply and are proud to show it off!
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Here is my current Ivy Bridge i7 system, powered by a Seasonic G-360 80+ Gold 360 Watt PSU:
http://www.overclock.net/t/1126863/real-world-power-usage-user-submitted-values/170#post_18164451

(also listed in my signature)

A lot of people are not aware still that high-powered power supplies are gradually becoming a thing of the past, except for older technology or quad-fire or similar set ups. I would like to celebrate improving efficiency and increase awareness of low-watt PSUs becoming more relevant. (Soon we'll be able to drive our computers entirely on a single small solar panel's worth of watts, right?
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One can dream! )

A power supply is at its peak efficiency at around 50% of its rated Wattage. Which means, for example, that if your system usually uses around 200 Watts in games, your optimal power supply would be a 400-Watt one. Recent technological advances result in such systems quite easily. And if you're not using the top end graphics cards, your in-game usage can easily be even lower, such as 150 Watts or less. Processors themselves are very efficient now, and with Haswell around the corner, I foresee 250-Watt PSUs for systems with integrated graphics being completely normal.

~ Enthusiast List ~
 

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Interesting thread, I've build a few very similar systems this year (up until February-March mostly, started with a build for myself and friend and ended up populating a gaming room with virtually identical systems) that consisted of an OCd 2500K, Gene-Z, OCd GTX 570 DCII using Cougar's SE 400W power supply... to my knowledge they're all (still) working flawlessly, awaiting VGA upgrades.
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Discussion Starter · #3 ·
Sounds great! I still get a surprised replies sometimes when I recommend anything under 500 Watts for people looking to build something with an Ivy i5 and the latest nVidia / Radeon graphics.
 

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You should rename as an international club since OCN is international. That you can call yourselves IEEE
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And nevermind the fact that I have a 750W psu...
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Discussion Starter · #5 ·
Quote:
Originally Posted by MME1122 View Post

You should rename as an international club since OCN is international. That you can call yourselves IEEE
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And nevermind the fact that I have a 750W psu...
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Yes, but that would be misleading!
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My second computer has a 750-watt PSU, which I got because it was a great one and on a sale I could not ignore (plus I had a GTX 580). I will phase it out eventually.

Are you subscribing to this school of thought, or just suggesting a clever name?
 

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My CPU is running a 30% overclock on below stock voltage. Does that count?
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Can't say the rest of my system qualifies. Though my recommendations should compensate.
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Discussion Starter · #7 ·
Quote:
Originally Posted by Phaedrus2129 View Post

My CPU is running a 30% overclock on below stock voltage. Does that count?
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Can't say the rest of my system qualifies. Though my recommendations should compensate.
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It's the thought that counts! The rest will catch up
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Also, love your signature. I had actually discussed it with a friend and laughed how Physics majors will immediately find it funny (as well as anything trivial that can be explained in Physics terms) ^,^

---
P.S.: I had a Phenom II 555 that I unlocked to 955 (4-cores). Had to use K10STAT to overclock and downvolt. It was super efficient! Spent forever tweaking a 3.7GHz profile, boosting per core, at the lowest possible voltages. It was like a real physics lab experiment, as I had 4 such profiles with various top boosts.
 

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I have an under-clocked and under-volted Q6600 + ATI 5670 HTPC running off a little 220 W supply. No power usage numbers though, I haven't bought a meter yet.

I'm also working on a car-puter build with an A8-3870k to save needing a separate GPU and that will be under-clocked and under-volted as well off a DC-DC 200 W Pico PSU.
 

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Quote:
Originally Posted by ElevenEleven View Post

Hello, and welcome!
Thanks, I figure those two almost make up for my Bulldozer
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This is one of those smaller OCN clubs (which are better than the big ones)
I wish I could join but unfortunately I don't really qualify apart from the Samsung Greens and using a few Green HDD's.

When I bought my PSU I had 2x 6950's in mind and I looked around and generally a 650W PSU was suggested. I found a 750W that was too hard to pass up so I went with that.
It all went to lower power usage from there, I got a 6870 because the 6950 was a bit too $$$ at the time, I then swapped the 6870 for a 6850 and crossfired two of them. I'm now sitting on a 7950 as per my rig.
I've also been through many different TDP's of processors, I started with an E8500 and then went to a Q9400 and now this 3570k. The weird thing was the Q9400 didn't produce a bit more heat compared to the E8500 (a bit less actually) and it used a drop more vcore too which I found rather strange.

Anyway, that's my rig so far. Hence why my PSU is so large compared to the rest of my system. I guess you can never be too sure, who knows one day I might get a job and get say 3x 7950's or something
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I had a Q9550 and a HD 5850 running on a 300W 80Plus (Shuttle PC60 FWIR) in my old Shuttle SG45H7 about 3 years ago. It also had a 160GB Intel X25-M G2, 1TB HDD, and 4x2GB DDR2-800. People thought I was nuts but the system ran perfectly for over 2 years before I sold it.
 

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Quote:
Originally Posted by ElevenEleven View Post

Does this mean you are in or that you are no longer subscribing to this school of thought? (looking at your 600-watt PSU)
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The last PSUs I used were 850W (Cooler Master Silent Pro M850) and now 600W but they were included with my case(s), so there's nothing I can do since it's a hassle to sell and buy needlessly.

But I believe that overspending on overqualified PSUs is a stupendous waste of money. If it weren't included I'd be wary of going higher than a quality 400-450 watter.
 

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I love your school of thought here but I`m a power waster. Dual 400watt TEC`s, dual 670`s, 3770K with a Seasonic X-1250. I might have to build something small and sweet in the near future to make myself feel less guilty. I`ll join up at that point, please don`t hate me now.
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Discussion Starter · #16 ·
This is not a hating thread! just hoping to inspire people more than being preachy about the global benefits of energy saving. Thanks for stopping by!

By the way, I was able to run a 7970 in my main rig since my GTX 670 sadly went bad and it was a good time to do some tests. Not as efficient as the GTX 670, but donwvolted a tad in Afterburner, I was able to run everything fine and use ~220 watts in some of my games (though GW2 went to 241 Watts from the wall, which equates to ~219 Watts after efficiency calculation) at 1000MHz core / 1500MHz memory.
 

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Quote:
Originally Posted by ElevenEleven View Post

This is not a hating thread! just hoping to inspire people more than being preachy about the global benefits of energy saving. Thanks for stopping by!
By the way, I was able to run a 7970 in my main rig since my GTX 670 sadly went bad and it was a good time to do some tests. Not as efficient as the GTX 670, but donwvolted a tad in Afterburner, I was able to run everything fine and use ~220 watts in some of my games (though GW2 went to 241 Watts from the wall, which equates to ~219 Watts after efficiency calculation) at 1000MHz core / 1500MHz memory.
I know you are not haters, but at least my Seasonic is running in its sweet spot of 90 % eff. Hey AXI if you are around I will see you on Saturday. Keep saving !
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Phaedrus, Thank You for always pushing me in the direction of cost and efficiency for power supplies purchases over the past few years. I can't even begin to imagine how many times I've linked your posts & threads on OCN and other forums. ElevenEleven, Thank You for your messages on the G 360 and posts here and elsewhere about it as well (JG/SPCR).
It looks like I'll be picking up an i7 3770 instead of the i3 2105 I had planned on going with, but I have a feeling an i7 and GTX 650 Ti won't push the G 360 hard enough to enter this club lol. I suppose I could always overvolt, so here's to hoping
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Quote:
Originally Posted by ElevenEleven View Post

A preliminary welcome and good luck with your new PSU!
You should look for deals on 3770s - I've been seeing them on sales for $278 periodically (and microcenter has it for $260 + tax). And I've read about NCIX price-matching Microcenter processor prices, so would be worth inquiring.
I already found a 3770 non K for $220
Edit: Scored a 3770K for $265
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Discussion Starter · #19 ·
A preliminary welcome and good luck with your new PSU!

You should look for deals on 3770s - I've been seeing them on sales for $278 periodically (and microcenter has it for $260 + tax). And I've read about NCIX price-matching Microcenter processor prices, so would be worth inquiring.
 
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