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Overclocking with the Ultra LSP550 Pro Lifetime Series?

post #1 of 12
Thread Starter 

I have a friend who has the Ultra LSP550 Pro Lifetime Series and he wants to overclock his E8600 on his XFX 750i, and I'm telling him to be careful because I've never heard anything good about it.  However, should I be telling him to get a better PSU before he attempts any overclocking?

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post #2 of 12
Quote:
Originally Posted by TwoCables View Post

I have a friend who has the Ultra LSP550 Pro Lifetime Series and he wants to overclock his E8600 on his XFX 750i, and I'm telling him to be careful because I've never heard anything good about it.  However, should I be telling him to get a better PSU before he attempts any overclocking?

According to Ultra, it's only got a 30A/360w rating on its 12v rail, so I think you know what to do.

Also, that model is allegedly made by ShenZhen RuiShengYua... so yeah.
Edited by svenge - 3/13/13 at 4:53pm
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post #3 of 12
Thread Starter 
Quote:
Originally Posted by svenge View Post


According to Ultra, it's only got a 30A/360w rating on its 12v rail, so I think you know what to do.

Also, that model is allegedly made by ShenZhen RuiShengYua... so yeah.

 

Oh wow.  Omg.  He's all excited too because he said he just upgraded from the E8200 and wants to overclock now.  I didn't have the heart to comment on this "upgrade", but when I learned what PSU he has... well needless to say I came here as quickly as I could.

 

He also has two 9600 GTs in SLi.  Maybe I should try to find a way to tell him how much of a risk this is.  Perhaps I can tell him that there's a risk of a fire.  I don't know.  I don't want to lie.  I want to give him the facts and I need to be convincing.  All I know how to say is, "omg no don't do it!"

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It's a computer!
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post #4 of 12
Quote:
Originally Posted by TwoCables View Post

Oh wow.  Omg.  He's all excited too because he said he just upgraded from the E8200 and wants to overclock now.  I didn't have the heart to comment on this "upgrade", but when I learned what PSU he has... well needless to say I came here as quickly as I could.

He also has two 9600 GTs in SLi.  Maybe I should try to find a way to tell him how much of a risk this is.  Perhaps I can tell him that there's a risk of a fire.  I don't know.  I don't want to lie.  I want to give him the facts and I need to be convincing.  All I know how to say is, "omg no don't do it!"

I like to use facts and figures with my friends before trying theatrics wink.gif

Tell him this: The 9600 GT video cards have a 95w TDP, so that's 190w in SLI. The E8600 is a 65w TDP chip. Then you've got the motherboard, assorted peripherals (fans, hard drives, etc.) and so forth. It's not really safe to run all those items even at stock speeds on a PSU that's really a low-quality 360w unit (despite the label's claims). It could overload, fail, and in the process destroy other components.

If that doesn't work, you can quote from Guru3D's review of the 9600 where he says:

"A second GeForce 9600 GT installed on this system requires you to have a 500 Watt power supply unit at minimum ... That power supply needs to have (in total) at least 36 Amps available on the 12 volts rails."
Edited by svenge - 3/13/13 at 5:04pm
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post #5 of 12
Thread Starter 

Wow.

 

16542.png

 

Their power supply pulled 396W from the wall outlet with two 9600 GTs running Oblivion at 2560 x 1600.  If their PSU was 80% efficient during this power draw, then their system was pulling 316W from the PSU during this test!

 

Oh man.

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250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
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Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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It's a computer!
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CPUMotherboardGraphicsRAM
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Hard DriveHard DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
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Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
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Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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post #6 of 12
So adding a 2nd 9600 GT required an additional 120w of power in that chart? That makes the TDP scenario I outlined 50w worse ([120-95] x 2) than when I originally typed it!
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post #7 of 12
Quote:
Originally Posted by svenge View Post

So adding a 2nd 9600 GT required an additional 120w of power in that chart? That makes the TDP scenario I outlined 50w worse ([120-95] x 2) than when I originally typed it!

Not really, as that's measured at wall, doesn't consider additional loss of power in power supply (and also an increase in power drawn by a CPU to keep up with the GPUs).

For a moderate OC on a 45nm dual core you're not exactly going to be increasing power consumption by all that much. It's more that the power supply is a cheapo that should be replaced regardless of overclocking.

Well, I guess with a heavy enough load you're legitimately getting close to the power supply's limit here.
post #8 of 12
Quote:
Originally Posted by mikeaj View Post

Not really, as that's measured at wall, doesn't consider additional loss of power in power supply (and also an increase in power drawn by a CPU to keep up with the GPUs)

I forgot to multiply by 0.8 to account for that, didn't I?

/smacks head
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post #9 of 12
Thread Starter 
Quote:
Originally Posted by svenge View Post


I forgot to multiply by 0.8 to account for that, didn't I?

/smacks head

 

Even though I did that in my post?  :)

 

Like I said, if their PSU was 80% efficient, then that would mean their system pulled 316W from it during that test.

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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 DriveOptical DriveOptical Drive
250 GB Samsung 840 EVO (OS) 3 TB Toshiba P300 (storage) Samsung SH-S243N 24x DVD Burner Samsung SH-S203N 20X DVD Burner 
CoolingOSMonitorKeyboard
Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) Filco Majestouch 104-key Cherry MX Blues w/NKRO 
PowerCaseMouseMouse Pad
Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate Basic, but premium round 
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post #10 of 12
Well, I can't be a genius all of the time, right?
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