Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

PSU for Radeon HD4870x2


  • Please log in to reply
13 replies to this topic

#1 Scorr

Scorr

  • Members
  • 6 posts
  • OFFLINE
  •  
  • Local time:10:34 PM

Posted 16 August 2010 - 12:31 PM

I recently bought a Huntkey 700 watt power supply and put it in my pc. I've also connected the two 6-pin connectors to my graphics card. The recommended amount of watts on my Radeon HD4870x2 are 650, so my PSU should easily be able to handle that but when I boot up my pc ATI Catalyst says I don't have enough power for my graphics card so it is throttled. I have the newest drivers installed. Is there any way to prevent this?

BC AdBot (Login to Remove)

 


#2 MadDawg

MadDawg

  • Members
  • 453 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Houston, TX
  • Local time:03:34 PM

Posted 16 August 2010 - 12:48 PM

I recommend getting a 750 or 800 watt PSU; 700 watts is cutting it close, IMO.
A penguin broke my windows with a half-eaten apple!

#3 Scorr

Scorr
  • Topic Starter

  • Members
  • 6 posts
  • OFFLINE
  •  
  • Local time:10:34 PM

Posted 16 August 2010 - 12:52 PM

I just bought it and I'm a bit short of cash now so I'm not going to get a new one. Point is it should be enough to support my graphics card but apparently it doesn't.

#4 JonM33

JonM33

  • Banned
  • 503 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:04:34 PM

Posted 16 August 2010 - 12:57 PM

I recommend getting a 750 or 800 watt PSU; 700 watts is cutting it close, IMO.


450W is nowhere close to 700W actually.

Posted Image

#5 dc3

dc3

    Bleeping Treehugger


  • Members
  • 30,802 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Sierra Foothills of Northern Ca.
  • Local time:12:34 PM

Posted 16 August 2010 - 06:39 PM

The wattage is important, but with graphics cards it is just as important that you have the proper amount of amperage on the 12V rail. If you don't have enough amperage to supply what the manufacturer is recommending, the voltage won't matter.

Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.

 

 

 

 


#6 MrBruce1959

MrBruce1959

    My cat Oreo


  • BC Advisor
  • 6,378 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Norwich, Connecticut. in the USA
  • Local time:04:34 PM

Posted 16 August 2010 - 07:03 PM

The wattage is important, but with graphics cards it is just as important that you have the proper amount of amperage on the 12V rail. If you don't have enough amperage to supply what the manufacturer is recommending, the voltage won't matter.


I agree with this statement 100%! :thumbsup:

That is one thing most computer builders mis-calculate is the current and its ability to perform an electrical function, which is called Amperes, it is the ability of a given electrical current to perform a certain task.

http://en.wikipedia.org/wiki/Ampere Read this for an explanation.

Hope this helps.

Bruce.

Edited by MrBruce1959, 16 August 2010 - 07:08 PM.

Welcome to Bleeping Computer! :welcome:
New Members: Please click here for the Bleeping Computer Forum Board Rules
 
My Career Involves 45 Years as an Electronics Repair Technician, to Which I am Currently Retired From.

I Am Currently Using Windows 10 Home Edition.

As a Volunteer Staff Member of Bleeping Computer, the Help That I Proudly Provide Here To Our BC Forum Board Membership is Free of Charge. :wink:


#7 RainbowSix

RainbowSix

  • Members
  • 604 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:04:34 PM

Posted 16 August 2010 - 09:09 PM

Does the PSU have multiple 12V rails? From what I see in screenshots, the 4870x2 has both 6-pin and 8-pin power connectors. I'm not sure how exactly 12v rails work but make sure you are using a separate 12V rail for each PCIe power connector if you aren't already.
[ Antec 1200 v3 | Gigabyte GA-890FXA-UD5 rev. 3.1 | AMD Phenom II x6 1090T (overclocked to 4GHz) | Corsair XMS3 4x4GB DDR3 1600 | COOLER MASTER Silent Pro 600W & Visiontek Juice Box 450W | SAMSUNG 470 Series 64GB SSD | WD Caviar Black 640GB & Samsung Spinpoint 2TB HDD | 2x XFX Radeon HD 5770 in Crossfire | SAMSUNG 22X DVD±RW | Microsoft Windows 7 Professional 64-bit]

CompTIA A+ certified
Stringfellow Electronics

#8 dc3

dc3

    Bleeping Treehugger


  • Members
  • 30,802 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Sierra Foothills of Northern Ca.
  • Local time:12:34 PM

Posted 16 August 2010 - 09:57 PM

I got curious about just what is suggested for the amperage on the 12V rail and did a quick search. It looks like that requires 26.6A. I'm assuming that this is split between the six and eight pin connectors.

Family and loved ones will always be a priority in my daily life.  You never know when one will leave you.

 

 

 

 


#9 dpunisher

dpunisher

  • BC Advisor
  • 2,234 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:South TX
  • Local time:03:34 PM

Posted 17 August 2010 - 05:50 AM

I think there are a couple of OEMs on that Huntkey. It is very possible that PSU may only put out 550 watts on a good day.

What is the exact model number on that PSU?

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)


#10 Scorr

Scorr
  • Topic Starter

  • Members
  • 6 posts
  • OFFLINE
  •  
  • Local time:10:34 PM

Posted 17 August 2010 - 08:48 AM

It's a HK700-52PP I believe. I have a Sapphire HD4870x2 card that only has two 6-pin connectors (unless the others are hidden somewhere!).

#11 RainbowSix

RainbowSix

  • Members
  • 604 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:04:34 PM

Posted 17 August 2010 - 12:35 PM

Is this the card? I see both a 6-pin and 8-pin connector.
If not, can you give us the exact Sapphire model?
[ Antec 1200 v3 | Gigabyte GA-890FXA-UD5 rev. 3.1 | AMD Phenom II x6 1090T (overclocked to 4GHz) | Corsair XMS3 4x4GB DDR3 1600 | COOLER MASTER Silent Pro 600W & Visiontek Juice Box 450W | SAMSUNG 470 Series 64GB SSD | WD Caviar Black 640GB & Samsung Spinpoint 2TB HDD | 2x XFX Radeon HD 5770 in Crossfire | SAMSUNG 22X DVD±RW | Microsoft Windows 7 Professional 64-bit]

CompTIA A+ certified
Stringfellow Electronics

#12 MrBruce1959

MrBruce1959

    My cat Oreo


  • BC Advisor
  • 6,378 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Norwich, Connecticut. in the USA
  • Local time:04:34 PM

Posted 17 August 2010 - 01:37 PM

I am posting a link which is relevent to this topic, it has both references to video cards and power supplies.

http://www.playtool.com/pages/home/index.html

Hope you all find this information useful.

Bruce.

Welcome to Bleeping Computer! :welcome:
New Members: Please click here for the Bleeping Computer Forum Board Rules
 
My Career Involves 45 Years as an Electronics Repair Technician, to Which I am Currently Retired From.

I Am Currently Using Windows 10 Home Edition.

As a Volunteer Staff Member of Bleeping Computer, the Help That I Proudly Provide Here To Our BC Forum Board Membership is Free of Charge. :wink:


#13 Scorr

Scorr
  • Topic Starter

  • Members
  • 6 posts
  • OFFLINE
  •  
  • Local time:10:34 PM

Posted 20 August 2010 - 04:44 AM

RainbowSix was right, one of them looked similar to the other one so I thought they were both 6-pin at first glance since both fitted. However, one of them is indeed 8 pins, with a 6 pin being in it right now. I've never had a PSU that had a connector with 8 pins, nor do I now.

#14 RainbowSix

RainbowSix

  • Members
  • 604 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:04:34 PM

Posted 20 August 2010 - 01:55 PM

You can find all kinds of adapter cables these days. In fact, your card may have come with one.

I know molex to 6+2 pin PCIE adapters exist because I just found them on newegg, but they only ship to the U.S. or Canada. Unfortunately, I don't know of any specific places for you to order them.

Edited by RainbowSix, 20 August 2010 - 02:01 PM.

[ Antec 1200 v3 | Gigabyte GA-890FXA-UD5 rev. 3.1 | AMD Phenom II x6 1090T (overclocked to 4GHz) | Corsair XMS3 4x4GB DDR3 1600 | COOLER MASTER Silent Pro 600W & Visiontek Juice Box 450W | SAMSUNG 470 Series 64GB SSD | WD Caviar Black 640GB & Samsung Spinpoint 2TB HDD | 2x XFX Radeon HD 5770 in Crossfire | SAMSUNG 22X DVD±RW | Microsoft Windows 7 Professional 64-bit]

CompTIA A+ certified
Stringfellow Electronics




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users