I want to know the PSU requirement for the 2 cards below
HD 5670 1 GB Xfired
HD 5770 1 GB Xfired
So, it sounds like he has two cards, 1 5670 and 1 5770. And he wants to run them in crossfire. He will need a 600W-650W PSU. The crossfired cards will run, and it will run as if he has 2 5670s in crossfire. Crossfire should give him better frame rates than 1 5770.
As you can see here it gives you 4 parallel PCI-E, this means if you get it you can crossfire any hi-end Graphic card couse most of them they use two pci-e connectors. Else you gonna run and find 2 molex to pci-e for every extra card you add screwing the cable managment, blocking the airflow and some small power loss for every extra connection you do.
After Testing HD5770 in 950Mhz 1350Mhz it runs fine with 81 Watts and gives 75 FPS and 90 FPS needed in the most games so you don't really need the CrossFire, it gave 59 C in the games and Furmark 1.8 extrem test 1 hour raised the watts to 87 and the temprature to 69 C (+-1 day ,-2 night) with the fan in 100%, very hight noise level. The 80 C and above you will get in HD5770 CF is a reall problem Furmark 1.8 will burn you out and i suggest we wait for the 32nm GPUs, DDR with lower operating volts.
I felt sorry for the kid, offered him to send his my 2 molex to pci-e connector! Finaly fixed it alone! I imagine him cutting wires and try to mix them, tape, etc. I simply suggest a PSU and if he take it he wont find him self in this possision. The 650 Watts Thermaltake can support up to 6 Satta ii in raid 0 without a problem, good tolerance in power loss in big tempratures for more info read the link i gave.
The OP in here spoke about Crossfire and i gave him a full analisys of the chip, and the best sollution for this 'opperation'.
hey big head my PSU did not cost $15 it was actually $75 and if you can show me a link to the $15 PSU i would be very surprised, also this is a reasonable quality PSU which does the job and looks nice fool!
FYI, your xpower has 30a on its 12v rail. for a 450w unit that is solid. for a 580w, that is crap. the 520w seasonic above as 120w more power on its 12v rail. My corsair has 216w more on its 12v rail and its only rated 20w more then your 580w.
ok thanks, ill target towards getting a 520watt power supply as i am still in doubt about which card to get as 5770 HD exceeds my budget. but if i somehow get the money for 5770 then according to what i understand, 520 watt supply will work with a CF setup of 2x5770 in future.
farr the 5770 helps you at more demanding games. I play most of my games maxed usually at 1080p. Even mass effect 2 get's really high fps. Well not all games but most.
With 2 5770 you should be able to get really great performance in games at high resolutions.
November 1, 2010 10:09:28 AM
I have the 650 Thermaltake PSU so i speack with personal experience the 140x140 fan in the PSU is need it in high tempratures belive me. The kid that did what i toled him to do didn't went his motherboard to be looked out at list. I repost the link and focus on Temprature tolerance power lost (solid capasitor tested in 105 C fully operational) becouse you speack about CF an HD5770 by not focusing on 80 and above C you will take is a huge mistake.