Best power supply for Core i7?

Hello, here is my system. It's about a three weeks old now and I couldn't be happier with my setup.
For the actual issue, go below the specs

Core i7 920 (Clock speed stock, memory overclocked to 1600, stock cooler) D0 Stepping (Whats that?)
Gigabyte GA- EX58 UD4P
OCZ Gold 1600 6gb Triple Channel
Diamond HD 4890 (Plan to add two more later)
Antec Nine Hundred
One SATA 7200RPM drive, one IDE DVD drive

My current issue is with my power supplies. I am using two 500 watt power supplies.

Power Supply #1: All of the fans, the DVD drive, the video card, and the motherboard power.

Power Supply #2: The 200mm fan, and the CPU power.

This seems to be holding up very good, although the current configuration is not exactly rock solid stable. It's frozen up a few times, but not enough to bother me. (Just about once per two weeks)

The only major setback is the temperatures I'm getting. This is almost unreal!
The two main sources of heat are the video card (which is expected) and power supply #1 which seems to be at it's peak.

What power supply would be best for my system? Remember it has to power at least one more 4890 with a lot of power left over.

Thanks

In MicroCenter (Our somewhat local PC store) they said one 4890 alone can take up to 380 watts by itself. Wow..

^+1 on the CORSAIR CMPSU-850TX 850W.... Most people in the new system build section recommends that PSU for two 4890's. I personelly support it, since I have it in my system. Another very good PSU is PC Power & Cooling Silencer PPCS910 910W

i wouldn't go for anything lower then 950W just to be on the safe side... but thats me, i wouldn't risk 3 X 4890's and an i7

http://www.newegg.com/Product/Prod [...] 6817139007

Try switching mobo power to PSU #2. And make sure that both psu's maintain strong (ground) contact with the each other and the case. Like a good gauge wire from a screw on the psu that's outside the case to a screw on the case. Otherwise they may have different "grounds" and that could cause some voltage issues for you. And potentially, some heat.

As for a replacement PSU, I'll let the others speak.

Keep in mind that most reviews measure total system power consumption, which will make things look FAR more power hungry than they really are.

CF 4890
i7 @ 3.8ghz
2gb ram

total peak is 402w...
http://www.techpowerup.com/reviews/ATI/HD_4890_CrossFire/23.html

what i think most people are saying (and im now saying) is that 850tx (or HX...if u need 3x4890 for the adapters) is gonna be over the top, but the best for what u need

He doesn't need a 1000W PSu

Yes, you are right my mistake. I didn't recheck the specifics and since I have a TPQ 850 modded with 8 PCI-E lanes I supposed it was the same everywhere.

However I don't get what you intend for "low". 70A is fine for a 1KW PSU also because he doesn't need all that power anyway. I don't think three 4890 requires more than 60A in the rails.

anyone read what i linked? 850 corsair is fine, and if he wants tri-fire, use the 850HX for the extra adapters

TDP does not equal power consumption.

According to xbitlabs the 4890 only uses 120W running 3DMark06. It won't use close to 200W even running Furmark.

I want something powerful enough to handle the system as if EVERYTHING is on 100% load. I plan on overclocking as high as my system will let me, without doing damage to components. All three 4890's may see some overclocking as well.

the animal - Thanks for posting the HD 4870 triple Crossfire power consumption from the Anandtech article. None of the usual power consumption charts are up to date.

When I mentioned a 1000 watt power supply during testing in my original post. I didn't mean to imply that a 1000 watt psu was necessary. I was just reporting what was used during testing. Sorry if there was a misunderstanding.

I'm getting different numbers for 3 4890s in crossfire.
http://mark.zoomcities.com/images/ [...] andgen.png

This site shows 421w for them at load, and that's not overclocked.

This article, which is the best i've seen at breaking down the actual power use of a system.
http://www.xbitlabs.com/articles/c [...] ttage.html

Puts an i7 system not overclocked, a GTX295 (which uses about 100w less then the 3x4890s), single hard drive, 3x1 GB of RAM at would be about 600w of power used at load with the 3-4890s. That is with nothing overclocked. The OP obviously has a highend system, his i7 (DO) will probably be clocked to 4.0 or higher, his 4890s will also be overclocked, i doubt if he is going to only use a single HD for any length of time. Once he's tweaked his system i bet his at load power consumption will be well over 700w. If i had just dropped over $2,000 into a top end gaming system, spending another $100 for a 1,000w + quality power supply is what i'd do.

http://www.newegg.com/Product/Prod [...] 6817194046
http://www.jonnyguru.com/modules.p [...] y&reid=145

yeah, overkill and i'll admit it, but the price is $100 more then the Corsair 850HX and with so much invested in a top end system, i'd spend it.

Yeah, that's why i like that xbitlabs link. The guy that ran it made some special apparatus to measure everything in a system. In the comments area of the article he also says at some time in the future he'll write another article to cover overclocking. I sure agree with you that it's tough to get accurate power use readings.

theanimal likes xbitlabs too. I've had the site bookmarked for quite some time but haven't really looked at it in depth. I guess it's time to go see what the site has.

For right now, you could definitely use a single, good quality PSU. If you really plan to trifire later though, you'll want a bit more than that.