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Old 26th Nov 2012, 10:05   #1
Owmyspleen
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850w G7 Extreme Modular ATX PSU Question

I recently bought this PSU for my first build. I hadn't read up a lot on power supplies so when i saw this for sale in a local shop I picked it up.

After searching round the internet I've seen that its got a fairly bad name but no real info on it to back this name up. I haven't had any bad experiences with it so far.
My system is:
-I5-3570k overclocked @4.4GHz W/coolermaster cooler
-Z77-D3H mobo
-16GB of Corsair Vengeance RAM
-Sapphire Vapor-x HD7970 3GB on 'Boost setting'
-G7 850W Extreme Modular PSU

Everything runs fine on both Crysis and on ultra settings with various mods, so its under a fairly heavy load for long duration.

The specs for it aren't too bad from what i can tell. It's certified to have an 86% plus efficiency. It has 4, 12V rails with 12v1 at 20amps and the rest at 18 or 19(I haven't got it in front of me so I'm not 100% which one it is). I'll post up more specs once I'm home and have the box in front of me.

Overall I'm happy with this PSU but would you recommend changing it over or should I stick with it based on the good experience I've had with it so far?

I'll be looking to swap my mobo out next year after Christmas and will be Crossfiring two of the above Sapphire cards, so would i have to swap this PSU out?
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Old 26th Nov 2012, 10:17   #2
Fire_fly
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I would defiantly change it before you go X-fire. Personally I would look at changing it as soon as possible.

Although it has not gone yet, the chances will increase once it is loaded with a second 7970. If it does go and takes bits with it you are looking at an expensive bill.


i5 3570K - GA-Z77X-UD3H - GTX 980Ti
Last edited by Fire_fly; 26th Nov 2012 at 10:31.
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Old 26th Nov 2012, 10:24   #3
spixelspixel
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What's the total amps on the 12v rail say? It comes with 4 pci-e cables, so it might not blow up. You'd be looking at round 500-550w full load with 7970 crossfire.
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Old 26th Nov 2012, 10:43   #4
Bacon?
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It appears to use the same layout and HEC PCB as this:

http://www.hardwaresecrets.com/artic...y-Review/902/9

Final words "Avoid at all cost"

i5 3570K OC'd with a H100 CLC
Z77-D3H & MSI 280X OC 8GB ADATA RAM
EVGA SuperNEX 650G Phanteks Enthoo pro
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Old 26th Nov 2012, 11:07   #5
Owmyspleen
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I'm not at home at the minute so I can't tell you the total current on all the rails.

I haven't seen any of the things that they said in the review that you posted. If the power supply was going to go south anytime soon would I know about it, as in would I have any unusual things happen whilst I'm running the computer?

I'll more than likely swap it out when I go to X-fire next year, depends on how well the single card runs Crysis 3.
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Old 26th Nov 2012, 11:14   #6
Bacon?
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Chances are you wouldn't know about it till it blew and nothing happened or blew and you lost your graphics card, motherboard and CPU.

Also did you read the entire review or just the conclusion?

i5 3570K OC'd with a H100 CLC
Z77-D3H & MSI 280X OC 8GB ADATA RAM
EVGA SuperNEX 650G Phanteks Enthoo pro
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Old 26th Nov 2012, 11:52   #7
Owmyspleen
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I was just re-reading the page on whether it can supply the amount it of power it said it could and that it was struggling to get into the 80% efficiency region at 80% load capacity.

The G7 PSU says that it is at a greater than 86% efficiency at 100% load so would that not suggest that is a different/ better made PSU than the linked one?
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Old 26th Nov 2012, 12:00   #8
Fire_fly
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Quote:
Originally Posted by Owmyspleen View Post
The G7 PSU says that it is at a greater than 86% efficiency at 100% load so would that not suggest that is a different/ better made PSU than the linked one?
No, the manufacture may have run a slightly different test or tweaked other variables to get that result.


i5 3570K - GA-Z77X-UD3H - GTX 980Ti
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Old 26th Nov 2012, 13:24   #9
olivier renault
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Your system deserves a better PSU. Never go cheap on those or their failure may be costly. Always get a known brand with good reviews.

If you gonna crossfire those, get a good 850W unit.

http://www.realhardtechx.com/index_archivos/Page541.htm

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Last edited by olivier renault; 26th Nov 2012 at 13:27.
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