Suggestions for PSU for new workstation build.

[DerwenArtos12]

I'm building a new workstation coming up. Budget is pretty much no issue at all. I'm currently thinking a pair if Xeon E5450 120w, dual FireGl7350's, 16GB of DDR-667 FB-dimms, 4 of the new 640GB WD drives, no optical or floppy. I was thinking of going with an 800W unit so I can keep it running as near to peak efficiency as I can. I'd like a single 12V rail for a lot of reasons. I've been on the single 12v for as long as i've had my seasonic S12-600 in my home computer. Any suggestions?

Thanks,

DA12

 

[MarcVenice]

Forget it

 

[DerwenArtos12]

Originally posted by: MarcVenice
http://www.zipzoomfly.com/jsp/...p?ProductCode=10006237

No brainer if you ask me. Stop japping about single rails . You could pick up two of these for the same price as a single rail 800w unit, if you want to play it save ?

I'm a little apprehensive to assume a 750W with four rails will be ok running dual E5450 Xeons with a total of 16GB of ram. I'm sure it could handle the dual 7350's with a gig each and the quad 640GB drives but, I'm apprehensive on the motherboard side with 120W TDPs on both processors.

 

[MarcVenice]

Well yeah, if we're talking hardware like that, there's no reason to hunt deals like those. I don't know, I'd go with a zippy or andyson, something server grade. Perhaps PC Power & Cooling Turbo-Cool 1KW ? Those cost 400$ and up though. I don't know many more with a single rail. Perhaps jonny can give some good suggestions.

Just throwing something out there: http://www.zippy.com.tw/P_prod...A1EPSL-6850P(G1)-PCIE4 it does support dual cpu's ? I probably never heard of PSU's that are commonly used in builds like yours though.

 

[DerwenArtos12]

Originally posted by: MarcVenice
Well yeah, if we're talking hardware like that, there's no reason to hunt deals like those. I don't know, I'd go with a zippy or andyson, something server grade. Perhaps PC Power & Cooling Turbo-Cool 1KW ? Those cost 400$ and up though. I don't know many more with a single rail. Perhaps jonny can give some good suggestions.

Just throwing something out there: http://www.zippy.com.tw/P_prod...A1EPSL-6850P(G1)-PCIE4 it does support dual cpu's ? I probably never heard of PSU's that are commonly used in builds like yours though.

I remeber a review abot a zippy like that one a while back and it was pretty good. Not fantastic but, pretty good. I did have all the hardware in the first post but, it's early so I'll let that one go mark

 

[jonnyGURU]

Originally posted by: DerwenArtos12

Originally posted by: MarcVenice
http://www.zipzoomfly.com/jsp/...p?ProductCode=10006237

No brainer if you ask me. Stop japping about single rails . You could pick up two of these for the same price as a single rail 800w unit, if you want to play it save ?

I'm a little apprehensive to assume a 750W with four rails will be ok running dual E5450 Xeons with a total of 16GB of ram. I'm sure it could handle the dual 7350's with a gig each and the quad 640GB drives but, I'm apprehensive on the motherboard side with 120W TDPs on both processors.

Actually, quad 12's could easily handle it. You're either going to have two procs on one +12V rail at 20A (240W) or each proc on it's own +12V rail at 18A or more (216W+). If the 800W is SLI certified, it will have the 7350's on it's own +12V rail (as per Nvidia's specs for paper certification of SLI).

I run a quad FX with a pair of 8800 Ultras with an 800W PSU with split up +12V rails just fine.

That said, if you're still stuck ont he single +12V rail marketing fluff, the only single +12V rail 800W PSU's I can think of are the Ultra X3 800W or the PCP&C Turbo Cool 850.

 

[DerwenArtos12]

Originally posted by: jonnyGURU

Originally posted by: DerwenArtos12

Originally posted by: MarcVenice
http://www.zipzoomfly.com/jsp/...p?ProductCode=10006237

No brainer if you ask me. Stop japping about single rails . You could pick up two of these for the same price as a single rail 800w unit, if you want to play it save ?

I'm a little apprehensive to assume a 750W with four rails will be ok running dual E5450 Xeons with a total of 16GB of ram. I'm sure it could handle the dual 7350's with a gig each and the quad 640GB drives but, I'm apprehensive on the motherboard side with 120W TDPs on both processors.

Actually, quad 12's could easily handle it. You're either going to have two procs on one +12V rail at 20A (240W) or each proc on it's own +12V rail at 18A or more (216W+). If the 800W is SLI certified, it will have the 7350's on it's own +12V rail (as per Nvidia's specs for paper certification of SLI).

I run a quad FX with a pair of 8800 Ultras with an 800W PSU with split up +12V rails just fine.

That said, if you're still stuck ont he single +12V rail marketing fluff, the only single +12V rail 800W PSU's I can think of are the Ultra X3 800W or the PCP&C Turbo Cool 850.

Hey Jonny,

Honestly, I've been stuck on single 12v since before PCP&C decided to use it as a marketing tool, lol. What PSU are you using and do you know how the 12v rails are devided out? Ideally it would be with the 24pin connector and the 4 pin on one rail, the 8 pin on another, teh 6 pins on another and the 4pin moles an d5 pin sata on the 4th right?

 

[MarcVenice]

jonny beat me to it Perhaps a linky to the atx 12v spec could be helpfull ?

 

[jonnyGURU]

Originally posted by: DerwenArtos12
What PSU are you using and do you know how the 12v rails are devided out? Ideally it would be with the 24pin connector and the 4 pin on one rail, the 8 pin on another, teh 6 pins on another and the 4pin moles an d5 pin sata on the 4th right?

Actually, that wouldn't be ideal... nor is it normal.

EPS12V would split the 8-pin and 4-pin across two +12V that would be all to it's own. That's not good for high end graphics cards and this is why early adoption of split +12V rails was a problem for SLI/Crossfire.

Since then, Nvidia has made it "mandatory" that PCIe gets it's own rail.

For the same reason power consumption of SLI isn't the equivalent of one GPU multiplied by two, your CPU's power consumption won't be the double of one.

What you typically see is the 8-pin and 4-pin on one rail, the 24-pin, Molex, SATA, etc. on a second and then each of two PCIe connectors on a third and fourth. If the PSU manufacturer is trying to support both EPS12V and SLI certification, there will be more than four rails and the 8-pin and 4-pin will be split up across two rails. This can be seen in a number of Topower built 1000W+ units and the Enermax Galaxy.

At risk of sounding like a shill because I'm a product manager at BFG, I use the BFG ES-800. It only has four +12V rails, but it works because the rails aren't "limited" at the typical 20A. There's 22A for the CPU's, 22A to the 24-pin and Molex, etc. and then each pair of PCIe connectors get their own 36A rail. Total overkill.

 

[Old Hippie]

How 'bout this ABS Tagan 1100 watter?

Six rails, or combine them into one at the flick of a switch!

J/K. I just linked it because I've never seen one before. Color coded, light-up, modular sockets? What will they think of next?

 

[DerwenArtos12]

Originally posted by: Old Hippie
How 'bout this ABS Tagan 1100 watter?

Six rails, or combine them into one at the flick of a switch!

J/K. I just linked it because I've never seen one before. Color coded, light-up, modular sockets? What will they think of next?

looking at that is actually a little re-assuring, I'm using those same connectors on my seasonic S12-600 to make it modular. They're actually more expensive than I was expecting but, they look great.

 

[DerwenArtos12]

Originally posted by: jonnyGURU

Originally posted by: DerwenArtos12
What PSU are you using and do you know how the 12v rails are devided out? Ideally it would be with the 24pin connector and the 4 pin on one rail, the 8 pin on another, teh 6 pins on another and the 4pin moles an d5 pin sata on the 4th right?

Actually, that wouldn't be ideal... nor is it normal.

EPS12V would split the 8-pin and 4-pin across two +12V that would be all to it's own. That's not good for high end graphics cards and this is why early adoption of split +12V rails was a problem for SLI/Crossfire.

Since then, Nvidia has made it "mandatory" that PCIe gets it's own rail.

For the same reason power consumption of SLI isn't the equivalent of one GPU multiplied by two, your CPU's power consumption won't be the double of one.

What you typically see is the 8-pin and 4-pin on one rail, the 24-pin, Molex, SATA, etc. on a second and then each of two PCIe connectors on a third and fourth. If the PSU manufacturer is trying to support both EPS12V and SLI certification, there will be more than four rails and the 8-pin and 4-pin will be split up across two rails. This can be seen in a number of Topower built 1000W+ units and the Enermax Galaxy.

At risk of sounding like a shill because I'm a product manager at BFG, I use the BFG ES-800. It only has four +12V rails, but it works because the rails aren't "limited" at the typical 20A. There's 22A for the CPU's, 22A to the 24-pin and Molex, etc. and then each pair of PCIe connectors get their own 36A rail. Total overkill.

Ok so, assuming I have to get the best layout possible I'm going to want ATX, EPS12v and sli or crossfire certified power supplies all in one with like 6 rails?

You know your stuff so I'm just going to default to you on this. If I had to choose between a single rail solution like the PCP&C 850W or 1KW and an ATX/EPS12V/SLI certified power supply which way should I go.

What do you think of the Tagan ITZ1000? seems to have all the connectors I need and then some, it's ATX and RPS12v and crossfire certified and even has a nice grouding strap, just in case.

 

[jonnyGURU]

I think the number of rails shouldn't be a deciding factor at all. That's like narrowing down an automotive choice based on the upolstery first.

Find a good unit and then, if it has multiple +12V rails, find out how the rails are split up across the connectors to see if it suits you.

That Tagan is a prime of example of what would work. They're trying to satisfy ATX12V, EPS12V and SLI certification, therefore it has 6 +12V rails. Each CPU gets a rail and the PCIe gets it's own rail.

 

[DerwenArtos12]

Originally posted by: jonnyGURU
I think the number of rails shouldn't be a deciding factor at all. That's like narrowing down an automotive choice based on the upolstery first.

Find a good unit and then, if it has multiple +12V rails, find out how the rails are split up across the connectors to see if it suits you.

That Tagan is a prime of example of what would work. They're trying to satisfy ATX12V, EPS12V and SLI certification, therefore it has 6 +12V rails. Each CPU gets a rail and the PCIe gets it's own rail.

I must just be a bass-ackward person cause I do tend to narrow things down in the wrong order. It works for me somehow though. I guess I make it work. I'll see if I can't find some reviews on that Tagan. I'm generally quick to make slightly rash decisions so, that tagan will probably end up being what goes in my system unless it has some bad reviews.

Thanks Everyone!!

DA12

 

[rich168]

how about the silverstone DA or OP series?

 

[DerwenArtos12]

Originally posted by: rich168
how about the silverstone DA or OP series?

okay, now I'm confused again, the OP and the DA series are ATX and EPS12V certified on a single rail??? Does this just mean they're not SLI or crossfire certified?

And what the crap. The ZM1200 has a switch so I can choose 6 rails or 1 rail! WTF?!?!?

 

[jonnyGURU]

Originally posted by: DerwenArtos12

Originally posted by: rich168
how about the silverstone DA or OP series?

okay, now I'm confused again, the OP and the DA series are ATX and EPS12V certified on a single rail??? Does this just mean they're not SLI or crossfire certified?

Yes. I never said that single +12V rails are not ATX12V or EPS12V compliant. Intel quietly lifted rails and rail assignments from the specification early last year, but the safety standard has not been lifted.

Performance-wise, it should make no difference. Potential for burning insulation wise, splitting the +12V makes a difference.

Originally posted by: DerwenArtos12And what the crap. The ZM1200 has a switch so I can choose 6 rails or 1 rail! WTF?!?!?

Yep. That PSU would be good too. Each CPU gets its own rail and each pair of PCIe connectors gets it's own rail. But the marketing FUD for single +12V rail has been so strong that they actually allow you to switch to a single +12V rail even though the rails being split into six would never have a problem.

 

[DerwenArtos12]

Originally posted by: jonnyGURU

Originally posted by: DerwenArtos12

Originally posted by: rich168
how about the silverstone DA or OP series?

okay, now I'm confused again, the OP and the DA series are ATX and EPS12V certified on a single rail??? Does this just mean they're not SLI or crossfire certified?

Yes. I never said that single +12V rails are not ATX12V or EPS12V compliant. Intel quietly lifted rails and rail assignments from the specification early last year, but the safety standard has not been lifted.

Performance-wise, it should make no difference. Potential for burning insulation wise, splitting the +12V makes a difference.

Originally posted by: DerwenArtos12And what the crap. The ZM1200 has a switch so I can choose 6 rails or 1 rail! WTF?!?!?

Yep. That PSU would be good too. Each CPU gets its own rail and each pair of PCIe connectors gets it's own rail. But the marketing FUD for single +12V rail has been so strong that they actually allow you to switch to a single +12V rail even though the rails being split into six would never have a problem.

Ok, the switch is marketing FUD. That makes sense and a bit of a difference. So I'd be pretty safe with the Tagan or the Silverstone 6 rails? That makes things a bit easier. Why can't the guys in CPU be so straight forward. I'm building a damn workstation and everyone is suggesting skulltrail.