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Help in CrossfireX power consumption.

post #1 of 8
Thread Starter 
I own a Sapphire HD7770 OC graphics card. And I decided to push my system just a little further, so thought of having a more mainstream HD7750.

Heard that both could easily be configured together without the CFireX bridge. So, I thought of giving it a try.

Since my ASUS motherboard only supports crossfire with configurations of x4 for the other pci-e slot. I really think of a high end gpu wont be appropriate taking consider of my tight budget.

My question is now how much power is needed for both to be running smoothly?

Now having 2 HDD and an SSD, I really think that my CM550GX power supply wont be enough to initiate the load. If not at what wattage is best for the config?

Please do assist. TQ.
post #2 of 8

Is your Cooler Master GX a Bronze series?  If not, then it will need to be replaced.  Otherwise, if it's the Bronze series, then it should be plenty of power.

It's a computer!
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It's a computer!
(19 items)
 
  
CPUMotherboardGraphicsRAM
i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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post #3 of 8
Thread Starter 
Just checked it sooo...

Yeah.... its a bronze series.

Anyway, I actually dont know of the benefits having a 'bronze' series rather than efficiency.
Does it really makes that much of a difference in performance compared with the standard ones?
post #4 of 8
No it doesn't usually. But in this case CoolerMaster made the original (non-Bronze) series and lied about the wattage. The GX650 was actually a 550W and the GX750 was actually a 450W. They got caught and made a revised series that could actually supply the labeled wattage, resulting in the GX450, GX550, GX650, and GX750 which are all pretty decent.
post #5 of 8
Just so you know CFX on works as fast as your slowest GPU. You would basically be handicapping the 7770
post #6 of 8
Thread Starter 
Still, will there be any performance increase if I use this config?
How far can it go considering me playing Crysis 2 at high settings?
post #7 of 8
Quote:
Originally Posted by KurouXX View Post

Still, will there be any performance increase if I use this config?
How far can it go considering me playing Crysis 2 at high settings?
yes, probably almost double fps
Quote:
Originally Posted by Maurauder View Post

Just so you know CFX on works as fast as your slowest GPU. You would basically be handicapping the 7770
not true
zen dream
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the old nag
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zen dream
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the old nag
(13 items)
 
 
CPUMotherboardGraphicsRAM
Zen 1700 Asrock B350 Pro4 MSI RX 480 4GB Crucial Ballistix DDR4 2400 2x4GB 
Hard DriveCoolingMonitorKeyboard
*ntel 600p 256GB NVMe Thermalright TRUE Spirit 140 Direct Dell SE2717HX Filco Magestouch MX Brown Tenkeyless 
PowerCaseMouseMouse Pad
SeaSonic M12II 620W Antec 300 Logitech G400 Glorious PC Gaming Large 
Audio
Sennheiser HD598 
CPUMotherboardRAMHard Drive
Phenom II x4 955 Asus M3N78 PRO 2GB Corsair XMS2-8500 DDR2 5-5-5-15 (2) OCZ 128GB SSD 
Hard DriveHard DriveHard DriveHard Drive
OCZ 30 GB SSD Samsung 2TB WD Black 2TB  WD Green 2TB 
OSMonitorPowerCase
Windows 10 x64 Dell P2414H Corsair CX430 v2 Fractal Design Define R5 
Other
Linksys EA6350 AC1200+  
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post #8 of 8
Thread Starter 
Whoa.... I see...

I'll buy one hd7750 then and start overclocking. I was suspicion at first, but when I checked the reviews.
The results seemed pretty feasible.

Don't see any hints of bottlenecking. Instead it came out that the frames doubled. Thanks a bunch man.

I'll definitely buying it. smile.gif
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