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Need a new PSU when upgrading?

post #1 of 13
Thread Starter 

So I have a Hiper 580W PSU at the moment. I have been looking at getting a new graphics card, maybe a HD 6870.

According to the PSU calculators my PSU would just about be ok to run everything I have, but I remember that amps must also be taken into consideration, if not more than watts.

Do I need to also upgrade my PSU? If so, what would be the best PSU to have when and if I buy a HD 6870, I may also be tempted a buy two, then I would be really happy with my gaming rig.

Would this be ok:


or is there such thing as overkill?
Chris-PC
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Chris-PC
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post #2 of 13
Hi again. Do you mind if I stalk you?

According to AMD, you wouldn't need more than a quality 550-600W to power your system if it had two 6870s in it:

http://www.amd.com/us/products/deskt...verview.aspx#3

But, I know nothing about this Hiper PSU. So I'll leave that up to someone who does.

But regarding overkill: oh there definitely is, and a part of it has to do with the efficiency, and another part has to do with the risk of having too small of a load on the PSU which can create instability:

http://www.overclock.net/power-suppl...fficiency.html

http://www.overclock.net/power-suppl...load-myth.html

http://www.overclock.net/power-suppl...-articles.html
It's a computer!
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It's a computer!
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post #3 of 13
I'd be interested to know the full model number of your current PSU.
Ideally if you could take a clear (bright and not blurry) picture of the sticker on its side, that would give me all the info I need.
FYI 850W is definitely overkill for a system with two 6870s; that can run on a good 650W unit. Second, if you were to get a 850W unit, there are better units to consider than the Corsair TX850.
Let's hear what PSU you actually have first.
post #4 of 13
Thread Starter 
Ok thanks for the replies

Here is my current PSU (exact one):

http://www.jonnyguru.com/modules.php...=Story&reid=85

Ok well, I am almost certainly wanting to upgrade to one 6870, a second one would be an option I would like to take in the future potentially.
Chris-PC
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Chris-PC
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post #5 of 13
Quote:
Originally Posted by Sin100 View Post
Ok thanks for the replies

Here is my current PSU (exact one):

http://www.jonnyguru.com/modules.php...=Story&reid=85

Ok well, I am almost certainly wanting to upgrade to one 6870, a second one would be an option I would like to take in the future potentially.
I stopped scrolling down when I saw that the +12V wattage capacity is only 360W.

In other words, I do recommend replacing it. Can you afford Antec's 550W TruePower New? It's not as modular as this Hiper unit, but it's still modular and it's a superior unit!
It's a computer!
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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
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250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
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Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
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Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #6 of 13
Jonny said exactly what I was going to say when I saw the +12V rating:

Quote:
But, if you look at test CL1, you can also see that I've thrown a 240W load onto the 3.3V and 5v rails, and yet the numbers aren't quite as bad as they could be. This, folks, is an old ATX 1.3 design, originally cooked up for the Pentium III days. However, test CL2 also shows that the 12V rails are indeed capable of the 30A total load given on the label. So, it can power many of our newer builds as well, provided one doesn't get too 12V happy with it. Personally, I would call this unit based on the tests results so far the equivalent to a modern 450W unit. You're not going to see the 580W promised on the label unless you really load down the 3.3V and 5V rails, and really what system built these days will get those two up that high?
Only it's been a couple years since that review, and systems are even more +12V oriented. It's now the equivalent of a modern 400W; quality 400W power supplies like the NeoECO 400W, CX400, and StealthXStream 400W carry +12V ratings of 30A, which is what your Hiper has.
post #7 of 13
In terms of wattage I think your system would run OK on the PSU you have, even with one 6870 thrown in there... but the mediocre build quality leaves much to be desired, so overall I'd recommend getting a new one.
Like I said, a good 650W unit would go a long way and would be perfectly fine even with two 6870s.
post #8 of 13
According to AMD, even a 600W would be fine to power a system with two 6870s in it:

http://www.amd.com/us/products/deskt...verview.aspx#3

So I think it stands to reason that even a quality 550W would be enough.
It's a computer!
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CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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Reply
It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #9 of 13
Thread Starter 
Well I think to be more future proof i'll look at getting a good quality 650W or 750W then?
I wish I could just buy, say a good 1000W and be done with it so I never have to bother changing my PSU again regardless what little or serious hardware I have in the future, but I do understand it doesn't work like that and having a overly-powerful PSU with little hardware can be just as bad as a small PSU on high powered equipment. I'ts all about balance I guess.
Chris-PC
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Saitek Eclipse II XFX Pro 650W Core Edition Corsair Carbide 300R Logitech MX518 
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Chris-PC
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Samsung 250GB EVO SSD (Internal) 2TB WD Black HDD (Internal) 4TB WD My Book HDD (External) LG 18X DVD-RW 
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Antec TruQuiet 140mm (X5) Antec TruQuiet 120mm (X2) Windows 10 Pro 64-bit 23" Samsung 2333HD 1080p 
KeyboardPowerCaseMouse
Saitek Eclipse II XFX Pro 650W Core Edition Corsair Carbide 300R Logitech MX518 
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post #10 of 13
Quote:
Originally Posted by Sin100 View Post
Well I think to be more future proof i'll look at getting a good quality 650W or 750W then?
I wish I could just buy, say a good 1000W and be done with it so I never have to bother changing my PSU again regardless what little or serious hardware I have in the future, but I do understand it doesn't work like that and having a overly-powerful PSU with little hardware can be just as bad as a small PSU on high powered equipment. I'ts all about balance I guess.
1000W maybe if you were running 3x OCed GTX 480s, but otherwise, no.
Unlawful
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Unlawful
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