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Can the HX1000 handle two overclocked 5970's?

gutcheck

By gutcheck
in Power Supplies

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gutcheck

gutcheck

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Well that sucks! I guess I can live with tri fire. I'm in no hurry to replace my 300 USD PSU, unless Corsair comes out with a bigger one. I could try 2 PSU's, that might be fun. I will have all my cards on water so I want to OC the hell outta them.
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lee63

lee63

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lee: I got that info from Corsair directly, so I'm going with their recommendation.

 

gut: One 12V line per card. In otherwords, make sure both cables that go to a video card come from the same 12V line as per this diagram:

http://forum.corsair.com/forums/showthread.php?t=70317

Well according to ATi your only able to run one 5870 with this PSU.

 

I'm interested to see what Corsair says about a few thing that I have found ? The 1x5870 draws more power than 2x4870X2 http://game.amd.com/us-en/crossfire_certified.aspx?cat=3 :confused: These are all ATi Certified BTW.

I'm not trying to be a pain in the butt but I need to know exactly what I'm able to run GPU wise. I'm sure when the next Nvidia card is released it will draw a crap load of power also.

 

 

Here ATi clearly says it takes a 850w to run 5970 CrossfireX...so now I'm really confused. I think Corsair need to look at this thread and make an official comment on this (No offense to you Wired)

 

http://img265.imageshack.us/img265/7117/atip.png

 

I also found this at Tweak Town.

 

http://img248.imageshack.us/img248/6356/93843739.png

 

A lot of poeple have the 58xx and 59xx cards right now...so it would be nice to get this cleared up.

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gutcheck

gutcheck

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lee: I got that info from Corsair directly, so I'm going with their recommendation.

 

gut: One 12V line per card. In otherwords, make sure both cables that go to a video card come from the same 12V line as per this diagram:

http://forum.corsair.com/forums/showthread.php?t=70317

 

So I can hook one 5970 up with the non modular cables, the 6 and 8 pin and I will get the 40A on that rail?

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gutcheck

gutcheck

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Well acording to ATi your only able to run one 5870 with this PSU...if so Ill need to sell it.

 

What do Corsair have to say about this ? The 1x5870 draws more power than 2x4870X2 :confused: These are all ATi Certified BTW.

 

Honestly I think that is not true. Corsair is never on ATI's lists. Maybe Corsair doesn't pay the fees they want to be on the list. The HX1000 is for sure, a good PSU. If it can't do it.....

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lee63

lee63

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Well acording to ATi your only able to run one 5870 with this PSU...if so Ill need to sell it.

 

What do Corsair have to say about this ? The 1x5870 draws more power than 2x4870X2 :confused: These are all ATi Certified BTW.

 

Honestly I think that is not true. Corsair is never on ATI's lists. Maybe Corsair doesn't pay the fees they want to be on the list. The HX1000 is for sure, a good PSU. If it can't do it.....

It is on the list.
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lee63

lee63

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Oh crap.

 

Do you have the link to that list? Man I don't want to buy a new PSU.....

I wouldn't panic yet the list is all messed up just check out some of the PSUs compared to each other...Ill wait to see what Corsair says about the list and the system requirments AMD/ATi have provided.

 

Here is the list BTW

 

http://game.amd.com/us-en/crossfire_certified.aspx?cat=3

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lee63

lee63

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Finally I found a review using the HX1000....and from what they tested I think we'll be fine

 

http://www.hexus.net/content/item.php?item=21212

 

http://img705.imageshack.us/img705/4664/86202410.png

 

Sli GTX 295 draws a 100w more than XF 5970s

 

http://img249.imageshack.us/img249/3664/15513719.png

 

This guy is using an 850w

 

http://www.youtube.com/watch?v=tbpeHkvKyKk&feature=related

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Wired

Wired

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lee: it technically went around the filter, and as I stated in the edit, I removed a pic.

 

Both Corsair and AMD aren't recommending this PSU for TWO 5970s. One's fine. I'll ask for a more detailed response, but we're talking about redlining the PSU for an extended period of time. Hexus didn't test the cards for 6 months straight or anything. OTOH, 512W for the FULL RIG? Sounds low, but what do I know, I wasn't there :) I'm wondering if it's more of an Amperage issue.

 

IMHO it's a robust PC and it can take some over the top punishment, but for how long?

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lee63

lee63

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2 5970s idle @ 159....unless you play games 24/7 for six months straight how can it possibly be redlining your PC ?

 

Also when you do the Power Supply search for your system and enter 2xGTX 295 (which draw more power than 2x5970s) and Overclock the CPU and GPUs,

 

The results show the HX1000 and the TX950w

 

I think a more detailed response is whats needed here before people start blowing up stuff.

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Wired

Wired

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6 months was just a random number :) What I meant is that we don't know how long they tested for at full throttle or if they tried to break a PSU w/ them or anything.

 

I'm finding too much different information on how much wattage it pulls. ATI says:

 

650 Watt or greater power supply one 75W 6-pin and one 150W 8-pin PCI Express® power

 

http://www.geeks3d.com/20090618/graphics-cards-thermal-design-power-tdp-database/

http://translate.google.com/translate?hl=en&sl=fr&tl=en&u=http%3A%2F%2Fwww.hardware.fr%2Farticles%2F777-2%2Fdossier-amd-radeon-hd-5970.html

 

Announced with a TDP of 294 watts ... AMD says the card is made for overclocking and the sink is able to collect up to 400 watts!

 

Watts / Voltage = Amps

[table=head]Watts|Voltage|Amps

225W|12V|18.75A

294W|12V|24.50A

400W|12V|33.33A[/table]

 

NOTE: I am very well aware that these are over simplified calculations. This isn't meant to be 100% accurate or scientific. Just back of the napkin stuff :)

 

So assuming:

  • those calculations are in the ballpark correct
  • a non-OC'd gaming scenario (e.g. 225W or 294W)
  • one card per 12V line on an HX1000W which has 40A per 12V line

 

This means you'd have between 15.25A and 21.25A left available on a 12V line that's connected to a 5970.

 

The last calculation falls roughly in line with what Anandtech said concerning OC'd 5970s.

 

So if this crap is right and depending on the rest of your rig's needs, you might get away with running 2 of them on an HX1000W. Two cards OC'd though? I wouldn't try it.

 

 

BTW, the link mentioned earlier by Synthohol now has the 5970 listed, and attempting to duplicate the Hexus setup got me 514W - 593W (depending on if you consider some random fans and an optical drive).

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lee63

lee63

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Thank for all your research and input Wired...yes it is very confusing. I guess we'll have to find out the hard way:roll: at the moment I only have 2 5870s,

 

It would be nice to have the option to upgrade to the 59xx without needing a new PSU.

 

I really like Corsairs products and wouldn't hesitate to buy a 1200w if they made one.

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lee63

lee63

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Well I'd be happy if I could OC the 5970 to stock 5870 speeds and then leave the 5870 at stock. Both would be on water so heat wouldn't be an issue. Is this safe?
Basically Corsair is not recommend it, so its up to us to decide.

 

I think it will be ok..but that's me ;): Ill prolly end up getting 2 5970s.

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