4870 and PSU - Techist - Tech Forum

Go Back   Techist - Tech Forum > Computer Hardware > New Systems | Building and Buying
Click Here to Login
Closed Thread
 
Thread Tools Display Modes
 
Old 12-25-2008, 12:16 PM   #1 (permalink)
Super Techie
 
Join Date: Dec 2005
Location: Massachusetts
Posts: 458
Default 4870 and PSU

My friend is building a PC on ibuypower.com and I was wondering if for a 4870 and e8400, is a 420W PSU enough? I know on newegg, the specifications require 500W, but on tomshardware benchmarks, it has the system drawing 283W (Power Consumption - Review Tom's Hardware : Radeon HD 4870: Better Than GTX 260!)
__________________

__________________
Intel E8400
Zalman 9500AT
evga 8800gt dual-slot cooler
4gig (2x2gb)g.skill ddr2 1066
gigabyte p43-ds3L
Antec sonata II mid tower
200gb Seagate HDD, 500gb Seagate HDD, 1TB Seagate HDD
bkolk is offline  
Old 12-25-2008, 12:35 PM   #2 (permalink)
disgruntled ex-moderator
 
Nagasama's Avatar
 
Join Date: Oct 2006
Location: probably on the lake
Posts: 6,956
Default Re: 4870 and PSU

it depends on the amperage, not the wattage. in any event, i would get a PSU with 30-40 amps on a single rail if possible. most psu's that small wont be anywhere near that.
__________________

__________________
"nagasama no longer drinks tecate, or streaks out of the night for anything, and he has a fine wife so he has no use for your girlfriend...she is safe..."
Nagasama is offline  
Old 12-25-2008, 12:37 PM   #3 (permalink)
Techie Beyond Description
 
veg1992's Avatar
 
Join Date: Dec 2006
Posts: 19,993
Default Re: 4870 and PSU

My recommendation is to avoid that 420w..

Try to choose the crappiest PSU possible, get on Newegg and order at least a 550vx and throw that in yourself
__________________
I do not accept help requests and/or deleted threads/complaints by PM, Profile or IM/Email. Just ask on the forums! Also, I do have Lockerz invites if you want them, feel free to PM me your email if you want one :0

If I help you, or you just like what I said, rep me by clicking the
or under my avatar; it helps me know that my advice actually helped you.


.. But things don't go according to plan! My Actual Rig, 2009:
veg1992 is offline  
Old 12-25-2008, 09:24 PM   #4 (permalink)
Monster Techie
 
meat_helmet's Avatar
 
Join Date: Apr 2006
Location: Sydney, Australia
Posts: 1,119
Default Re: 4870 and PSU

Quote:
Originally Posted by bkolk View Post
My friend is building a PC on ibuypower.com and I was wondering if for a 4870 and e8400, is a 420W PSU enough? I know on newegg, the specifications require 500W, but on tomshardware benchmarks, it has the system drawing 283W (Power Consumption - Review Tom's Hardware : Radeon HD 4870: Better Than GTX 260!)
Yes it may be drawing 283W under load, but, your PSU doesnt just run a video card does it. A 420W PSU may top out at around 300W or less dedicated to the 12v rails that the video cards run off - and that aint nearly enough.

As Naga said, its more about amps than watts anyway, its alot more complex than just having a certain wattage of psu - it depends on how many watts and amps are dedicated to the gpu, how efficient the psu is, how well built it is, and how stable/reliable it is.

Bottom line though - 420W isnt enough.
__________________
meat_helmet is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
buying 4870 SiZcO New Systems | Building and Buying 11 12-17-2008 12:33 PM
Recommended Watts for 4870 Crossfire? mike4realz New Systems | Building and Buying 2 12-02-2008 06:13 AM
FS: BFG 8800GTS 320mb OC2 / EZCool 600W PSU (NEW!) Oreo Buy/Sell/Trade and Hot Deals 2 08-30-2008 05:52 PM
NVIDIA GeForce GTX 280 3-Way SLI vs. ATI Radeon HD 4870 X2 Quad CrossFireX Prototype New Technology and Products 57 08-24-2008 08:08 PM
HD 4870 not displaying on boot up darkop16 Hardware Repairs and Troubleshooting 0 08-17-2008 12:26 PM



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 05:57 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.