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Stop recommending 650W-850W power supplies for single card systems

 
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post #31 of 286 (permalink) Old 06-15-2011, 07:53 AM
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+1 to the PSU expert (Phaedrus)

I ran my 2600k @ 5GHz and two 5870 2GBs @ 1GHz each off an Antec Neo Eco 620c.

EDIT: Phaedrus, I do have a question. There was a guy earlier this week OCing his 6950 on a TX 650. He said that the 12v rail started to really droop as he took it above 980MHz. Once he switched to a 1200w he didn't have this problem. Now, was this just because the TX 650 is an older PSU? Or something else?


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post #32 of 286 (permalink) Old 06-15-2011, 07:54 AM - Thread Starter
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Quote:
Originally Posted by ktf View Post
System Type:1 physical CPU
Motherboard:Regular - Desktop
CPU:Intel Core i5-2500K 3300 MHz Sandy Bridge
Overclocked:4500 MHz, 1.3 V
CPU Utilization (TDP):90% TDP
RAM:2 Sticks DDR3 SDRAM
Video Card:NVIDIA GeForce GTX 570
Video Type:Single Card

ATTENTION: FOR PERSONAL, NON-COMMERCIAL USE ONLY
IDE HDD 5400 rpm:5 HDDs
IDE HDD 7200 rpm:2 HDDs
DVD-RW/DVD+RW Drive:1 Drive
Sound Blaster w/ Front Bay:Yes
Additional PCI Card (avg):2 Cards
Fans
Regular:4 Fans 120mm; 3 Fans 140mm;
Keyboard and mouse:Yes
System Load:90 %

Minimum PSU Wattage:585 Watts
Recommended Wattage:635 Watts

Please note that those numbers are relative and do not include GPU OC. I have a 750 W Corsair and I doubt it would handle perfectly another 570 with full OC on both cards and CPU. And efficiency is at its best at around 50 % of PSU power, so I don't see why we should not recommend 650 W for gaming rigs.

A 650 W PSU holding SLI of 570 ? Are you sure ?

PSU calculators are unreliable. I find the eXtreme.outervision.com one tends to overestimate for newer cards and underestimate for older ones. It used to recommend ~500W for a system with a 4870; now it recommends a 350W.


I am 100% positive that you could do SLI with overclocks on your current PSU.

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post #33 of 286 (permalink) Old 06-15-2011, 07:55 AM
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Lol, this also reminds me of a review I read from one of Newegg's "expert" buyers about a Silverstone Strider 1500W. He said it wasn't enough to run two GTX 580's and he had already fried two AX1200's! At some point you want to just say to some people, "Look buddy, you're doing it wrong!"


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post #34 of 286 (permalink) Old 06-15-2011, 07:59 AM
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Quote:
Originally Posted by Majin SSJ Eric View Post
Lol, this also reminds me of a review I read from one of Newegg's "expert" buyers about a Silverstone Strider 1500W. He said it wasn't enough to run two GTX 580's and he had already fried two AX1200's! At some point you want to just say to some people, "Look buddy, you're doing it wrong!"
*Plugs 8-pin PCIe into motherboard*


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post #35 of 286 (permalink) Old 06-15-2011, 08:03 AM
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Quote:
Originally Posted by Phaedrus2129 View Post
Knock it off, you're making people waste money. I guess a lot of you are newer users, but you could still look at what the more experienced are saying. If the person is going to use a GTX590 or HD6990, sure recommend a 650W. But if they're using an HD6950 or GTS450 or HD6850 and state that they aren't going to SLI/Crossfire, then recommending a 650W or more is wasting their money.

And before saying "they may want to SLI/Crossfire later", first check and make sure that they have a dual slot motherboard in the first place.
Sorry but I would never get branded 650W PSU for 6950 in CF. Minimum for me is 700-750W. Thank You.

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post #36 of 286 (permalink) Old 06-15-2011, 08:03 AM
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So Phaedrus will a HX750 power 2 580s, i7 950 @ 4GHz w/ 1.28v + SSD + WD Caviar Black + 5 AP-14s + 1 AP-15 + NF-P14 + 140mm CM fan + 230mm LED CM fan and a Xonar DX?

Quote:
Originally Posted by Majin SSJ Eric View Post
Lol, this also reminds me of a review I read from one of Newegg's "expert" buyers about a Silverstone Strider 1500W. He said it wasn't enough to run two GTX 580's and he had already fried two AX1200's! At some point you want to just say to some people, "Look buddy, you're doing it wrong!"
Clear example of PEBKAC.
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post #37 of 286 (permalink) Old 06-15-2011, 08:03 AM
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I ran a 4870X2 2GB with an Antec EarthWatts 500W and my sig rig below for a few months with no problems at all.

Getting overly powerful PSU's is overrated and is a waste of money.

If people DO actually upgrade to CF/SLI, then buy a more powerful one and sell the old one. Its really not that hard.

The Metallian
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WD Blue M2 SATA 512GB, Crucial M4 256GB, Samsung HD203 2TB
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post #38 of 286 (permalink) Old 06-15-2011, 08:04 AM
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Quote:
Originally Posted by morphus1;13879966 
People ask for advice and people give advice... it's kinda what OCN is all about.

Another I see is when people ask advice about building a gaming rig, then get a list of parts where they're spending more on a motherboard than a video card.

Comp #2: Intel 2500k, GTX480, MSI P67AGD55, 4gb G Skill, X-Fi XtremeMusic,Logitech Z5500, 24" Gateway LCD, Antec P180,3 striped 36gb Raptors + 1 500gb, Hyper 212+, Corsair 520HX.

Comp #3:Intel 2500k, GTX480, MSI P67AGD55 , 4gb G Skill, Antec 650W, Logitech 560 4.1, 24" Acer LCD, Chenming MidTower, Liteon DVDRW, 74gb Raptor + 500 gb, Hyper 212+, Creative X-Fi XtremeGamer.

Comp #4: Intel 2500k, MSI 6950 2gb, Asus P8P67A, 4gb G. Skill, 22" Acer LCD,Raptor 150, Hyper 212+, Logitech 530, Antec P180, Antec TruePower 650w,Creative X-Fi XtremeMusic,Liteon DVDRW
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post #39 of 286 (permalink) Old 06-15-2011, 08:05 AM
 
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I was talking to my old boss who has an 850 watt PSU in his system. From what I gather he was upgrading to a 2600k and keeping his 460 video card.

Get this, he told me he needed to upgrade the PSU (the 850watt psu) in order to accommodate the upgrades (the 2600k). I told him 800watt should be enough but he said "no, no, I have fans and hard drives that need power."

Since I was quitting that day I said nothing, I was waiting for my final pay-check so I didn't argue with him. Really for any single card system a 80 plus 450 should be enough to power his system, 500w for security maybe.

I totally agree with this, even though the PSU in my rig is totally overkill. But I was once running two 4850's in SLI.
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post #40 of 286 (permalink) Old 06-15-2011, 08:09 AM - Thread Starter
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Quote:
Originally Posted by blackbalt89 View Post
So Phaedrus will a HX750 power 2 580s, i7 950 @ 4GHz w/ 1.28v + SSD + WD Caviar Black + 5 AP-14s + 1 AP-15 + NF-P14 + 140mm CM fan + 230mm LED CM fan and a Xonar DX?



Clear example of PEBKAC.
Should.

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