Sign-in / Sign-up
Your question

Crossfire PSU requirements

Tags:
  • Radeon
  • Power Consumption
  • Crossfire
  • Graphics
  • Product
Last response: in Graphics Cards
October 8, 2012 7:59:51 PM

I'm a budget (tightwad) gamer and I am looking at adding a second Radeon 5770/6770 in a crossfire setup. AMD lists the PSU requirements as 600W, but that seems a bit high. They list the same 600W requirement for many cards, including the 5870, which we know use considerably more power than the 5770/6770.

Just for reference: http://www.anandtech.com/show/4260/amds-radeon-hd-6790-...

Shows 5770 at up to 100w less power consumption as the 5870, and yet same PSU requirement from AMD? If 600w can handle two 5870, then one would think you could even get away with 430w on two 5770.


I've got a Rosewill continuous 530w (peak 630w) PSU. You think I would be OK to add the second card? If I had to upgrade the PSU, then grabbing a 7850 or 6950 makes more sense, but I can add another 6770 for about $70-80.

Also, just in general, are the power requirements a bit liberal? You see that even high end cards are only generating a total system load of 250-350w yet often a 500w+ PSU is required by the card maker.

More about : crossfire psu requirements

October 8, 2012 8:19:26 PM

That's plan B. The 5770 cards are only going for $50-60 on ebay, which is part of the reason I considered getting a second. Assuming I only net $45 after fees and shipping, It's barely worth selling.



m
0
l
Related resources
October 8, 2012 8:42:44 PM

micro stuttering and driver problems are two extremely big reasons to go with a single gpu, with 2 6770, micro stuttering will be crazy, and a 7850 is a little better then a 6950 to compare 6000 and 7000 series.
m
0
l
October 8, 2012 8:55:06 PM

I was already set out to buy a 7850 before I saw that my card wasn't worth anything to sell. So I guess I already knew the answer to that one. But I still would be curious to hear about the power requirements and real world CF power usage.
m
0
l
October 8, 2012 9:02:04 PM

for those two cards i would say a nice 400w could run it, depending on your build.
m
0
l
October 8, 2012 9:07:49 PM

To answer your original question, that PSU is fine for two of those cards. I too would recommend going with a stronger single card unless you're playing at an insanely low resolution, but that's up to you.
m
0
l
October 8, 2012 9:20:31 PM

You could wait for the 8850, supposedly will be $200 with performance around gtx 670 (I doubt, but we shall see in the near future! Thats is of course if we survive December 21st.)
m
0
l
October 8, 2012 9:45:54 PM

At this point you wise as well get what you can from the 5770 you wont get much but it will help its not worth much and isn't really all that great of a performer in todays games.
m
0
l
October 8, 2012 9:54:29 PM

The 5770 was doing awesome until I got BF3 over the weekend! :) 

I guess I should just pony up and get a GTX 660 or 7870 and quit being such a cheapskate.
m
0
l
October 8, 2012 10:12:26 PM

I loved my 5770 but you wont get very good frames on high detail or ultra. I wouldn't say you are being cheap get what you can man :) 
m
0
l
October 9, 2012 1:38:03 AM

Alright, thanks guys. I guess I will be looking for a good deal on a GTX 660. That one seems like a good bang for the buck right now and outperforms the 7800 series Radeons for BF3.




m
0
l
October 9, 2012 1:53:02 AM

I bought the EVGA GTX 660 a couple of weeks ago and I highly recommend it. It has never gone below 40fps on ultra settings. And in certain situations it goes up to 70
m
0
l
October 9, 2012 2:00:41 AM

I apologize twelve I meant wouldn't not would. I would say there is a good portion of us that would want the best stuff on the planet if we could afford it but we all can't hopefully you end up with something that gives you the frames you need to enjoy yourself man :) 
m
0
l
October 9, 2012 2:12:18 AM

bigshootr8 said:
I apologize twelve I meant wouldn't not would. I would say there is a good portion of us that would want the best stuff on the planet if we could afford it but we all can't hopefully you end up with something that gives you the frames you need to enjoy yourself man :) 




It's OK to call me cheap, I admitted to it in the OP.

I just need to find that perfect level of price/performance that keeps the Mrs. from complaining. ;) 


m
0
l
October 9, 2012 2:39:07 AM

What she doesn't know wont hurt her :p  just spend the 1000 dollars on a 690 :p  kidding!!!!!!
m
0
l
October 9, 2012 3:48:24 AM

Use a PSU Calculator Pl0x
m
0
l