Go Back   Hardware Canucks > PC BUILDERS & TWEAKERS CORNER > New Builds

    
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old September 19, 2010, 05:14 PM
Socrates_Johnston's Avatar
MVP
 
Join Date: Apr 2010
Location: Waterloo
Posts: 284

My System Specs

Question Help me choose a PSU, ATI GPU(s?)!

I have slowly been gathering parts for a new build of mine, here is what I have accumulated thus far:

mobo: DFI UT 790FX-M2R
cpu: AMD Phenom II X4 955 Black Edition
ram: G.Skill 4gb (2x2) DDR2 1066 (F2-8500CL5D-4GBPK)

These parts should play nicely together I think (if not let me know!)

I still haven't settled on a graphics card(s) and subsequently this will impact what PSU I purchase.

I was thinking about getting two 5770's to crossfire, which will cost roughly ~$300... but at around the same price point I can get a single 5850 (that could potentially be x-fired in the future). I understand that the 5770s scale pretty well when crossfired, but certain games I play do not play well with multi-gpu set ups (namely SC2)... suggestions?

As for my GPU, I figure something in the ~700w range will be sufficient to power potentially two GPUs, an overclocked CPU/RAM, (probably) 2 HDDs. I was looking at the Seasonic X750 (or X650 if it is powerful enough to handle a multi-gpu set up)... or also potentially a Corsair PSU (the AX750 in particular)...

If you think one of these PSUs may be overkill let me know!
Reply With Quote
  #2 (permalink)  
Old September 19, 2010, 05:45 PM
Top Prospect
 
Join Date: Jun 2010
Location: Windsor, ON
Posts: 244
Default

If you go with the 2 5770's in CFX then go with the SeaSonic X650, otherwise get the X750 for the 2 5850's.

Good luck with your build
Reply With Quote
  #3 (permalink)  
Old September 19, 2010, 09:09 PM
Phill's Avatar
Allstar
 
Join Date: Mar 2007
Location: Morden MB
Posts: 591

My System Specs

Default

Can you stretch your budget a little? IMHO this is currently a great deal found on NCIX latest sale!



Also I do think this PSU would go well with a 5870. Also taken from NCIX latest sale
[
Reply With Quote
  #4 (permalink)  
Old September 20, 2010, 02:50 AM
Top Prospect
 
Join Date: Jun 2010
Location: Windsor, ON
Posts: 244
Default

If you do stretch your budget to get the 5870 and plan to do CrossfireX later on, then I would suggest getting a 750W unit instead, due to 2 of them during close to 400W @ max output. I always set aside 300W for the system before taking the gpu's max power in consideration to leave plenty of headroom so I'm not stressing out the power supply.

Corsair offers 3 750W units, the TX HX & AX series. The TX is non-modular, the HX and AX are both modular with the AX been a Gold certified unit.
Reply With Quote
  #5 (permalink)  
Old September 20, 2010, 06:26 AM
fishingfanatic's Avatar
Hall Of Fame
 
Join Date: Mar 2010
Location: Hamilton Ont
Posts: 1,249

My System Specs

Smile New Builds

In order to get the most out of your system, consider getting the best gpu you can for the money. That said, keep an eye on the BST threads for some excellent deals.

As for psu, modular really is better overall, so keep an eye out for one that's on sale or in the BST s well. Caldezar had a 850 watt XFX psu on sale for $125, a good psu, though I believe it's pending.
Reply With Quote
  #6 (permalink)  
Old September 23, 2010, 01:32 PM
Rookie
 
Join Date: Jun 2010
Location: Toronto (Downtown)
Posts: 15

My System Specs

Default

Quote:
Originally Posted by fishingfanatic View Post
In order to get the most out of your system, consider getting the best gpu you can for the money. That said, keep an eye on the BST threads for some excellent deals.

As for psu, modular really is better overall, so keep an eye out for one that's on sale or in the BST s well. Caldezar had a 850 watt XFX psu on sale for $125, a good psu, though I believe it's pending.
I believe there's also a M12D Seasonic 850W for $130 which is a steal of a deal too in the BST. I'd go with a 750W+ unit because as stated above, the extra headroom is golden. The new Corsair AX series are really something else. I was reading somewhere that the 750W version is basically fanless until it hits over 300W load? I'd double check that though as i just stumbled on the thread while browsing.
Reply With Quote
  #7 (permalink)  
Old October 6, 2010, 06:23 PM
Rookie
 
Join Date: Oct 2010
Posts: 6
Default

I have a Seasonic X-650 and an ATI 5850.

I had the same concerns about Crossfire 5770 or single 5850 at the beginning. But if the price and power is the same, I'd prefer single GPU. No scaling/crossfire problem possible and you always have the option of upgrading later on.

650W is enough for two 5850 in crossfire. You can look at the ATI Specs if you want to.

I was planning on going crossfire, but right now, I have to say that one 5850 on a 1650x1050 monitor is plenty... so I'll upgrade to a 120GB OCZ Vertex 2 SSD instead of going crossfire.
Reply With Quote
  #8 (permalink)  
Old October 7, 2010, 11:52 AM
Top Prospect
 
Join Date: Nov 2009
Location: Canada
Posts: 83

My System Specs

Default

I was concerned about crossfire for a while. Due to budget and the availability of a low cost to free 3870 in addition to my own I was considering that. But then I got a 4850 for $20. So I'm relieved of that worry.

I've always been a bit wary about crossfire/SLI. I use a GTX295 with the latest drivers a few months ago for a bit and there was some stuttering issues. High FPS, but stutter. Mostly in COD4, so it would have rendered it useless for competitive gameplay.
Reply With Quote
Reply


Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help me choose a PSU ADay2Long Power Supplies 5 September 12, 2010 09:00 AM
PSU-related GPU issue? Moss Orleni Power Supplies 6 August 31, 2010 11:01 AM
Nvidia or ATI... What to Choose. Chromey Video Cards 19 March 26, 2010 04:46 PM
Is this possible: nvidia and ATI gpu simultaneously Navi CPU's and Motherboards 20 January 24, 2010 04:19 PM
help to choose best psu for x1950pro Real_DeaL311 Power Supplies 10 October 17, 2007 05:47 PM