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which psu should i buy??


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31 replies to this topic

#1 gerry13

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Posted 14 April 2011 - 01:01 PM

hi,my computers specs are:


motherboard GA-880GM-UD2H
cpu:AMA Athlon ii x3 3.20 ghz
RAM:6 gb(1x2gb,1x4gb DDR3)
2 hard disks: maxtor 6Y120M0(120gb),WDC WD6400AAVS-00G9B1(640 gb)

i'm going to buy an ATI radeon hd 5770 graphics card.i have heard that my 450w psu won't be able to handle it so i amplanning to buy a 700w psu.

however i'm not sure since i know very little about PSUs.can anyone help me??

Edited by hamluis, 14 April 2011 - 01:15 PM.
Moved from Internal Hardware to System Upgrading forum.


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#2 the_patriot11

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Posted 14 April 2011 - 01:59 PM

a 450 watt should handle your system if its a good one, but it would be a tight fit. With PSUs, you want to look for A: wattage, B: amperage on the +12v rail(s) and C: efficiency. I would want a PSU with at least 45-50 amps on the +12v rails, and at a bare minimum a 80% efficiency rating. Something like this or this (this would be my preference) should do you just fine.

picard5.jpg

 

Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

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#3 gerry13

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Posted 14 April 2011 - 03:55 PM

thanks a lot for the reply!!!

the psu i intend to buy has:

A:750 watts
B:60 A
C:80% efficiency

#4 the_patriot11

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Posted 14 April 2011 - 05:38 PM

what brand?

picard5.jpg

 

Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

If I don't reply within 24 hours of your reply, feel free to send me a pm.


#5 killerx525

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Posted 14 April 2011 - 06:19 PM

If your planning to do crossfire in the future then the 750W psu would be a good buy.

>Michael 
System1: CPU- Intel Core i7-5820K @ 4.4GHz, CPU Cooler- Noctua NH-D14, RAM- G.Skill Ripjaws 16GB Kit(4Gx4) DDR3 2133MHz, SSD/HDD- Samsung 850 EVO 250GB/Western Digital Caviar Black 1TB/Seagate Barracuada 3TB, GPU- 2x EVGA GTX980 Superclocked @1360/MHz1900MHz, Motherboard- Asus X99 Deluxe, Case- Custom Mac G5, PSU- EVGA P2-1000W, Soundcard- Realtek High Definition Audio, OS- Windows 10 Pro 64-Bit
Games: APB: Reloaded, Hours played: 3100+  System2: Late 2011 Macbook Pro 15inch   OFw63FY.png


#6 DJBPace07

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Posted 15 April 2011 - 02:26 AM

Don't bother with using Crossfire on a 5770, you would be better off just buying a better single card than deal with the increased power usage and heat. A single 5770 only needs 450W, about 600W with Crossfire, either of Patriot's suggestions would work.

3939.png

 


#7 gerry13

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Posted 15 April 2011 - 03:18 AM

what brand?



coolermaster GX series 750 psu(RS750-ACAAE3-EU)

#8 gerry13

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Posted 15 April 2011 - 03:21 AM

Don't bother with using Crossfire on a 5770, you would be better off just buying a better single card than deal with the increased power usage and heat. A single 5770 only needs 450W, about 600W with Crossfire, either of Patriot's suggestions would work.


my motherboard has an ATI radeon hd4250 graphics card so i will propably use Hybrid crossfire!

if i try to make crossfire i will need a new motherboard but i'm not planning to get a new one since my current motherboard is about one month old :P

which graphics cards are better for crossfire??

#9 killerx525

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Posted 15 April 2011 - 05:29 AM

That Coolermaster power supply should do fine. Maybe two 6870.

>Michael 
System1: CPU- Intel Core i7-5820K @ 4.4GHz, CPU Cooler- Noctua NH-D14, RAM- G.Skill Ripjaws 16GB Kit(4Gx4) DDR3 2133MHz, SSD/HDD- Samsung 850 EVO 250GB/Western Digital Caviar Black 1TB/Seagate Barracuada 3TB, GPU- 2x EVGA GTX980 Superclocked @1360/MHz1900MHz, Motherboard- Asus X99 Deluxe, Case- Custom Mac G5, PSU- EVGA P2-1000W, Soundcard- Realtek High Definition Audio, OS- Windows 10 Pro 64-Bit
Games: APB: Reloaded, Hours played: 3100+  System2: Late 2011 Macbook Pro 15inch   OFw63FY.png


#10 dpunisher

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Posted 15 April 2011 - 06:17 AM

http://www.hardwaresecrets.com/article/Cooler-Master-GX-750-W-Power-Supply-Review/917/10

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#11 the_patriot11

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Posted 15 April 2011 - 11:43 AM

Just to warn you, the 4290 will not crossfire with a 5770 or any 5/4000 series card. the integrated 4250 will only hybrid in with 3000 series video cards, check your motherboards manual or email ASUS to find exact compatibility.

picard5.jpg

 

Primary system: Motherboard: ASUS M4A89GTD PRO/USB3, Processor: AMD Phenom II x4 945, Memory: 16 gigs of Patriot G2 DDR3 1600, Video: AMD Sapphire Nitro R9 380, Storage: 1 WD 500 gig HD, 1 Hitachi 500 gig HD, and Power supply: Coolermaster 750 watt, OS: Windows 10 64 bit. 

Media Center: Motherboard: Gigabyte mp61p-S3, Processor: AMD Athlon 64 x2 6000+, Memory: 6 gigs Patriot DDR2 800, Video: Gigabyte GeForce GT730, Storage: 500 gig Hitachi, PSU: Seasonic M1211 620W full modular, OS: Windows 10.

If I don't reply within 24 hours of your reply, feel free to send me a pm.


#12 DJBPace07

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Posted 15 April 2011 - 10:04 PM

Hybrid Crossfire isn't designed for midrange GPU's and will only work with a very limited set of GPU's, of which the 5770 is not included.

3939.png

 


#13 gerry13

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Posted 16 April 2011 - 05:07 AM

i just found a better psu for about the same price:

http://www.multirama.gr/products/product?pid=0511492&catid=020500

#14 killerx525

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Posted 16 April 2011 - 08:17 AM

What brand is that?

>Michael 
System1: CPU- Intel Core i7-5820K @ 4.4GHz, CPU Cooler- Noctua NH-D14, RAM- G.Skill Ripjaws 16GB Kit(4Gx4) DDR3 2133MHz, SSD/HDD- Samsung 850 EVO 250GB/Western Digital Caviar Black 1TB/Seagate Barracuada 3TB, GPU- 2x EVGA GTX980 Superclocked @1360/MHz1900MHz, Motherboard- Asus X99 Deluxe, Case- Custom Mac G5, PSU- EVGA P2-1000W, Soundcard- Realtek High Definition Audio, OS- Windows 10 Pro 64-Bit
Games: APB: Reloaded, Hours played: 3100+  System2: Late 2011 Macbook Pro 15inch   OFw63FY.png


#15 dpunisher

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Posted 16 April 2011 - 10:22 AM

What brand is that?


Mystery PSU. I looked at a closeup pic and it still has a voltage switch so you know it is an ancient/cheap design. Even 80% efficiency is doubtful. That website doesn't even list the rails.

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)





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