I currently have an 850 watt thermaltake PSU and 1 PNY GTX 260. I'd like to add a 2nd card but my power supply only has 3-6 pin connectors and I need 4. I'm running the i7-920 with 1 HDD, 1 DVD drive, and 3 gigs of ram. Is it at all possible to add a 2nd card in w/o buying a new PSU?
- Wattage 850 Watts
- Fan 140 mm
1900 rpm ± 10%
Air Flow: 82 CFM
- Efficiency 85% +
- PFC Active PFC
- Hold-Up Time 16 ms
- Switches ATX Logic on-off additional power rocker switch
- Motherboard Connectors 24-pin Main Connector
4+4-pin Power Connector
- Power Good Signal 16 ms
- Form Factor ATX 12V 2.2
- Dimension 6.3 x 5.9 x 3.3 inch (L)x(W)x(H)
160 x 150 x 85 mm (L)x(W)x(H)
- Warranty 5 Years
- Certifications ATI CrossFire X Certified
80 Plus Certified
- Input Voltage 100 VAC~240 VAC
- Input Current 115 VAC / 10A max
230 VAC / 5A max
- Input Frequency Range 47 ~ 63 Hz
- Inrush Current
- Operating Range
- MTBF >120,000 hours
- RFI / EMI CE, CB, TUV, FCC, UL, CUL, BSMI
- Output Table
- Over Voltage Protection +5V trip point @ 7.0 Vmax
+3.3V trip point @ 4.5 Vmax
+12V trip point @15.6 Vmax
The high end PC has an i7 920 at stock speeds, 3x1GB DDR3, 1 HD and a GTX295.
The system drew 502.8 @ full load with i7 920 and a GTX295. I believe a 550W PSU may not be able to adequately supply power to the entire system for an extended period of time. This system was at full load with the GPUs and CPU both stressed. I wouldn't be so foolish as to use a small power supply running at near 100% when I could spend a few more dollars for a larger unit which can supply a larger amount of current. I agree that 1000W PSUs are pointless, but a 750W is not by any means. If you still strongly feel a 550W PSU can supply enough current, go ahead and do it. A power supply is the last component you want to cut corners with just to say that you "can" use a 550W PSU.
I am already using the PSU. I love it. Best power supply I have ever owned. I was just wondering if people thought it would be worth it or not.
Sounds like I will just wait until the GTX 285 drops in price and replace the GTX 260 instead of just picking up a second one. I don't run high resolutions anyways, so the SLI wouldn't scale that well anyways. Would have been neat to try is all.
If you run a power supply that "supplies" enough power...... not one that's friggin "good" enough, everything will run as it should and things will run cooler. I've been down that road. Stop trying to cheapen things up by buying just enough..... it's a losing situation in the long run.
There is no such thing that will always supply enough power. There is always a new card that makes old power requirements seem weak. 500 watts seemed extreme a few years ago. Then 750 was crazy to even think about, now 1,000 watts is getting to be the norm.
I have never had a PSU destroy a component from being overloaded, just BSD it and restart. So it doesn't seem like there is much harm in asking if anyone else has tried this before buying yet another soon to be outdated PSU.