Go Back   Computer Forums > General Computing > Hardware
Click Here to Login
Join Computer forums Today


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-16-2008, 04:48 AM   #1
(╯□)╯︵ ┻━┻
 
Teny's Avatar
 
Join Date: Dec 2006
Location: United States
Posts: 5,957
Default how much power?

so i got a new motherboard, the MSI K9A2 CF.
seems pretty cool so far, doesnt have as much OC feature as my old DFI one.
since i bought the board, it says it supports crossfire.
i am thinking of getting a 3870 sometime after 2 weeks, and another 3870 whenever i can (most likely around next year).
i couldnt find any bench marks of the 3870 CF against a single 8800 GT/GTS.
i was originally going to get a 8800GT, but the 3870 seems a little cheaper right now. I am on a budget since i dont have a job yet, and would like to have some extra cash just in case something breaks down.
so anyways, i was just wondering how big of a power supply should i get for a single 3870?
what about 3870 CF?
i am pretty sure that 450W is not good enough. and what are some good brands for PSU?
my specs on are on sig.
thanks in advance.
__________________

__________________
Desktop -Cooler Master NV690/AMD Phenom II X4 965 BE/MSI 880G-E45 Motherboard/2 x 2GB DDR3 G.Skill Ripjaws X/Sapphire HD 5870 1GB GDDR5/CORSAIR CMPSU-550VX/Seagate 7200.12 500GB (OS), Samsung F3 1TB (Storage)/Sony DVD Burner/Windows 7 Professional 64-bit
Teny is offline   Reply With Quote
Old 05-16-2008, 05:27 AM   #2
Daemon Poster
 
wmorri's Avatar
 
Join Date: May 2007
Posts: 1,066
Send a message via AIM to wmorri
Default Re: how much power?

If you are looking at getting a second graphics card in the future then I would recommend that you get around a 700watt PSU. Just to be on the safe side.

cheers!
__________________

__________________
LEARN BY DOING NOT BY FOLLOWING DIRECTIONS!
Linux Forever!

I thought you were a hispanic/african american? Who is the white guy in the pictures?
wmorri is offline   Reply With Quote
Old 05-16-2008, 06:25 AM   #3
Fully Optimized
 
ssc456's Avatar
 
Join Date: Jan 2007
Posts: 4,279
Send a message via MSN to ssc456
Default Re: how much power?

depends on the affiency i think you'll be good with 500 Watt PSU
__________________
He who has never failed has never attempted anything worth succeeding at.

Dont Eat Animals, Its Not Good For Them And They Dont Like It!
ssc456 is offline   Reply With Quote
Old 05-16-2008, 06:39 AM   #4
Omnipotent One
 
Atomic Rooster's Avatar
 
Join Date: Apr 2006
Location: USA
Posts: 11,161
Send a message via AIM to Atomic Rooster Send a message via Yahoo to Atomic Rooster
Default Re: how much power?

A good 450W PSU is fine for a system using a single HD 3870. It's recommended to have at least 550W for a Crossfire setup.

Some good choices would be OCZ, Silverstone, SeaSonic, Enermax, Antec.

Atomic Rooster is offline   Reply With Quote
Old 05-16-2008, 12:03 PM   #5
Golden Master
 
worshipme's Avatar
 
Join Date: Oct 2007
Posts: 5,603
Default Re: how much power?

Quote:
If you are looking at getting a second graphics card in the future then I would recommend that you get around a 700watt PSU. Just to be on the safe side.

cheers!
BS. AMD recommends a 550W PSU for dual card CrossfireX, and you have to remember that AMD also has to take PoS power supplys into account in that rating. A quality 450W+ would be enough for HD 3870 CF.
I've not heard of Xion unless you mean Xclio so I'll let others answer that.
Quote:
i couldnt find any bench marks of the 3870 CF against a single 8800 GT/GTS.
I can assure you that a HD 3870 CF setup is going to be faster than a single GT in almost every benchmark except for the odd one where Crossfire is not well supported.
__________________
AMD Phenom II X4 955 BE @ 4.0GHz + TU120E lapped - MSI 770-CD45 AM3 - 2x2GB OCZ DDR3 1333MHz - Sapphire HD 4870 - Samsung Spinpoint 500GB 7200RPM 16MB cache HDD - Tagan TG600-BZ Piperock - (Currently open test bed) - Windows Vista Home Premium 64bit.
worshipme is offline   Reply With Quote
Old 05-16-2008, 11:15 PM   #6
(╯□)╯︵ ┻━┻
 
Teny's Avatar
 
Join Date: Dec 2006
Location: United States
Posts: 5,957
Default Re: how much power?

Quote:
Originally Posted by worshipme View Post
I can assure you that a HD 3870 CF setup is going to be faster than a single GT in almost every benchmark except for the odd one where Crossfire is not well supported.
i see, thanks.
but what about 3850 CF against the 8800?
i saw benchmarks, some shows its the same, and some shows that its worse.
buying 2 3850 is about $100 cheaper than buying 2 3870, thats why i am asking in case you guys are wondering.
__________________
Desktop -Cooler Master NV690/AMD Phenom II X4 965 BE/MSI 880G-E45 Motherboard/2 x 2GB DDR3 G.Skill Ripjaws X/Sapphire HD 5870 1GB GDDR5/CORSAIR CMPSU-550VX/Seagate 7200.12 500GB (OS), Samsung F3 1TB (Storage)/Sony DVD Burner/Windows 7 Professional 64-bit
Teny is offline   Reply With Quote
Old 05-17-2008, 12:00 AM   #7
Omnipotent One
 
Atomic Rooster's Avatar
 
Join Date: Apr 2006
Location: USA
Posts: 11,161
Send a message via AIM to Atomic Rooster Send a message via Yahoo to Atomic Rooster
Default Re: how much power?

It really is a tossup between the 3850 CF and a 8800GT. The CF setup will work better if the game's are optimized for dual video cards and running at the highest resolutions. A single 8800GT performs better at standard resolutions using AF and AA settings.
Atomic Rooster is offline   Reply With Quote
Old 05-17-2008, 12:58 AM   #8
(╯□)╯︵ ┻━┻
 
Teny's Avatar
 
Join Date: Dec 2006
Location: United States
Posts: 5,957
Default Re: how much power?

playing games on 1680 by 1050 resolution, which is the best option? (8800, 3850 CF, 3850 CF)
and what about playing 1680 by 1050 resolution with AA and AF on? (mid to highest setting)
oh yeah, and i found this link, but doesnt show the resolution as 1680 by 1050
http://www.legitreviews.com/article/605/1/
__________________
Desktop -Cooler Master NV690/AMD Phenom II X4 965 BE/MSI 880G-E45 Motherboard/2 x 2GB DDR3 G.Skill Ripjaws X/Sapphire HD 5870 1GB GDDR5/CORSAIR CMPSU-550VX/Seagate 7200.12 500GB (OS), Samsung F3 1TB (Storage)/Sony DVD Burner/Windows 7 Professional 64-bit
Teny is offline   Reply With Quote
Old 05-17-2008, 01:10 AM   #9
Omnipotent One
 
Atomic Rooster's Avatar
 
Join Date: Apr 2006
Location: USA
Posts: 11,161
Send a message via AIM to Atomic Rooster Send a message via Yahoo to Atomic Rooster
Default Re: how much power?

If you noticed in that review, the 8800GT held it's ground against the 3850 in some games. When the resolution was cranked up, the 3850 CF pulled ahead. I'm assuming those benches were done with all options on including AF an AA.
__________________

Atomic Rooster is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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



All times are GMT -5. The time now is 08:55 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0