gutcheck Posted November 21, 2009 Share Posted November 21, 2009 According to this: http://www.anandtech.com/video/showdoc.aspx?i=3679&p=4 You need to have one buff PSU. For overclocked operation, AMD is recommending a 750W power supply, capable of delivering at least 20A on the rail the 8pin plug is fed from, and another 15A on the rail the 6pin plug is fed from. There are a number of power supplies that can do this, but you need to pay very close attention to what your power supply can do. Frankly we’re just waiting for a sob-story where this card cooks a power supply when overvolted. Overclocking the 5970 will bring the power draw out of spec, its imperative you make sure you have a power supply that can handle it. I know one should be no problem, but how about 2 in Crossfire? Link to comment Share on other sites More sharing options...
lee63 Posted November 28, 2009 Share Posted November 28, 2009 I would like to know the answer to this as I might be getting two of these cards. Link to comment Share on other sites More sharing options...
Synthohol Posted November 28, 2009 Share Posted November 28, 2009 how about 40A per rail? Link to comment Share on other sites More sharing options...
FEAR6655 Posted November 29, 2009 Share Posted November 29, 2009 HX1000 can easily handle 2x 4870 X2 overclocked cards, therefore because the 5970 uses about 20w less than the 4870 X2, this PSU will handle 2 of those cards overclocked as well. Link to comment Share on other sites More sharing options...
lee63 Posted November 29, 2009 Share Posted November 29, 2009 HX1000 can easily handle 2x 4870 X2 overclocked cards, therefore because the 5970 uses about 20w less than the 4870 X2, this PSU will handle 2 of those cards overclocked as well.I guess if you look at it that way it makes sense...thanx. Link to comment Share on other sites More sharing options...
gutcheck Posted December 1, 2009 Author Share Posted December 1, 2009 Thanks, because I have them sitting here. What I want to know, is if I get these to 5870 speeds, how many watts am I pulling at full load? I mean, I also have a OC'ed CPU, 3 HD's and a SSD, 2 pumps, a fan controller, and 2 I/O drives. Can she handle it Scotty? Link to comment Share on other sites More sharing options...
Synthohol Posted December 1, 2009 Share Posted December 1, 2009 http://www.extreme.outervision.com/psucalculatorlite.jsp fill it out as complete as you can. Link to comment Share on other sites More sharing options...
gutcheck Posted December 1, 2009 Author Share Posted December 1, 2009 I did that... No 5970's there Link to comment Share on other sites More sharing options...
NfiniteZERO Posted December 1, 2009 Share Posted December 1, 2009 After looking at the rail disto diagram up top, I'm not too sure how that will work out. 12v1 and 12v2 are split up between the GPUs and the mainboard. Looking over your build and what-not, you may have to get two PSUs just to handle the load you are looking for. Link to comment Share on other sites More sharing options...
Wired Posted December 1, 2009 Share Posted December 1, 2009 http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-5000/hd-5970/Pages/ati-radeon-hd-5970-system-requirements.aspx 650 Watt or greater power supply one 75W 6-pin and one 150W 8-pin PCI Express® power connectors recommended (850 Watt with two 75W 6-pin and two 150W 8-pin connectors for ATI CrossFireX™ technology in dual mode) http://ati.amd.com/certifiedPSU doesn't even list that video card as of yet. Also some interesting power draw info @ [H]ard|OCP: http://www.hardocp.com/article/2009/11/18/amd_ati_radeon_hd_5970_video_card_review/7 Without crunching numbers, I THINK the HX1000W can handle it, but depending on what else is in your system you could certainly max it out. Link to comment Share on other sites More sharing options...
NfiniteZERO Posted December 1, 2009 Share Posted December 1, 2009 I agree Wired - the HX1000 can handle it if it were running stock...but even then it might be pushing it. As soon as you factor in an OC CPU, WD Raptor drives, and two pumps the HX1000 doesn't have enough amps on the rails to keep everything powered optimally. I think he's going to have to split the load with another smaller power supply to make everything happy. Link to comment Share on other sites More sharing options...
Wired Posted December 1, 2009 Share Posted December 1, 2009 ... or wait for Dr. Emmett Brown's 1.21 gigawatt PSU! :) Link to comment Share on other sites More sharing options...
NfiniteZERO Posted December 1, 2009 Share Posted December 1, 2009 Does that come with a Mr. Fusion to power it? That'd be one hell of a deal if it did. :D @Gutcheck, I'd recommend going through and figuring how much exactly how much your system is pulling. It's going to be a number crunching game. Link to comment Share on other sites More sharing options...
gutcheck Posted December 2, 2009 Author Share Posted December 2, 2009 I'll just use one for now then. What is this business about 12v1 and 12v2 using the mobo too? So, should I hook the GPU up with the modular PCIe cables, or the ones attached to the supply? Corsair, time to make a 1500 watt!!! And sleave it!!!!!!!!!! Link to comment Share on other sites More sharing options...
gutcheck Posted December 2, 2009 Author Share Posted December 2, 2009 What about a 5970 and a 5870? Is there a bay PSU everyone likes? Link to comment Share on other sites More sharing options...
NfiniteZERO Posted December 2, 2009 Share Posted December 2, 2009 I'll just use one for now then. What is this business about 12v1 and 12v2 using the mobo too? So, should I hook the GPU up with the modular PCIe cables, or the ones attached to the supply? Corsair, time to make a 1500 watt!!! And sleave it!!!!!!!!!! Just use the modular ones and you should be alright with just the one. I was trying to do the math with both OC'd cards, OC'd CPU, etc. and starting typing out loud again :D: Link to comment Share on other sites More sharing options...
gutcheck Posted December 2, 2009 Author Share Posted December 2, 2009 Really? I shouldn't use the PCIe cables that are attached to the supply? Link to comment Share on other sites More sharing options...
lee63 Posted December 2, 2009 Share Posted December 2, 2009 I have been told the HX1000 is really a 1200w PSU.....is this true ? Link to comment Share on other sites More sharing options...
gutcheck Posted December 2, 2009 Author Share Posted December 2, 2009 Yes, I have read this too someplace.... Can someone clarify this modular connector thing? Link to comment Share on other sites More sharing options...
Wired Posted December 2, 2009 Share Posted December 2, 2009 Where'd you read that? It may be well engineered and can take more punishment than a standard PSU, but I've never heard that before. That's a 20% overage. Maybe they were talking about how much wattage it can pull from the wall (1250W * 80% = 1000W). Link to comment Share on other sites More sharing options...
FEAR6655 Posted December 3, 2009 Share Posted December 3, 2009 The HX1000 is actually just essentially 2x 500w PSU's in parallel. I think the 1200w claims come from here, however it seems its referring to a 1200w PSU based on the design of the HX1000, rather than the HX1000 actually being a 1200w PSU, which it can't be as per it being 2x 500w. Link to comment Share on other sites More sharing options...
Wired Posted December 3, 2009 Share Posted December 3, 2009 Just got word from internal - it's not recommended as it's like redlining your car all the time. Link to comment Share on other sites More sharing options...
gutcheck Posted December 3, 2009 Author Share Posted December 3, 2009 Whats not recommended? 2 5970's? If so, can you ask if a 5970 + a 5870 would be OK? I would imagine it would, the 5870 has a TDP of only 180ish watts. Link to comment Share on other sites More sharing options...
FEAR6655 Posted December 3, 2009 Share Posted December 3, 2009 5970+5870 would be fine. Link to comment Share on other sites More sharing options...
gutcheck Posted December 3, 2009 Author Share Posted December 3, 2009 so how do I hook them up? This topic about not using the non modular cables is interesting. I had a single 295 that I RMA'ed like 5 times because of issues, but I have 3 5850's with no issues. How do I hook up the single 5970? how about the 5970 and the 5870? Link to comment Share on other sites More sharing options...
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