OCZ or Corsair PSU?

[beehew]

I'm looking at going with a different PSU than I have right now. I bought an Apevia 700w PSU and just don't feel right trusting my system with it. So, I'm looking at 2 different PSU's right now:

CORSAIR CMPSU-750TX 750W ATX12V $90 w/MIR
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

OCZ OCZ700MXSP ModXStream Pro $49 w/MIR
http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=10009502

FYI:
CPU - E8400
RAM - 4 GB, 2 sticks
VGA - Radeon HD 4890

I plan on crossfiring another HD 4890 in a year or so, so I need something that can handle that increased load- as both of these should. The Antec calculator says I need about 275w for my set-up, but I've read that you need at least 700 for crossfire. The Corsair would be my first choice since it has a little more power and tons of connectors. I'm not crazy about the modular set-up of the OCZ, as I've read that modular is less efficient but this particular unit seems to do very well in reviews. The price difference is enough that if there is not much of a gap between the two, I'd probably go with the OCZ.
I made a mistake with buying that Apevia, so I'd like to get some input from the pro's here before I make another one. And as always, if there are any other options or things that I can or should consider, LMK.
BTW, I also have an Antec Basiq BP430 430W. I'd have to buy a PCI splitter for it if I were to use it.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371023

 

[redgarl]

The modXstream is a great power supply for loads between 350 and 550 Watts with a great efficiency.

For a single card setup, take the OCZ. It's way enough.

The OCZ is the most efficient of the 2 PS you have chosen with 85% at usual loads. Unless your are stressing it with higher loads, the Corsair will be a little better.

The problem right now is that there is only 2 PCIe cables with the OCZ. So if you plan to Crossfire 2 4890, take the Corsair.

 

[xtc28]

Corsair for the Upgrade in the future.

 

[xaira]

corsair always

 

[boulard83]

Corsair is BETTER

 

[beehew]

How about this- my upgrade schedule is usually about every 4-5 years. I understand that concept of buying a PSU for future upgradablility, but it seems to me that with how infrequently I upgrade, it would be better to buy a new PS at that time. My last PSU has the wattage (560w) I need, but it has tons of floppy and IDE connectors and only 1 or 2 SATA. I could buy splitters and adapters, but it's easier to just buy a new unit. So, the Corsair is way more than I need right now, but will it be what I need in 5 years? I'm sure a PSU in 5 years will be even more efficient and have the connectors for the ever-evolving hardware that we are all slaves to. Why shouldn't I go with a 500w OCZ modstream for now? ($30) According to Antec, even with crossfired 4890's, I'd only need about 375 watts max. I know that Corsair is well regarded, but a certain tier list has both the OCZ moddtream and Corsair TX lines graded at level 2.

 

[redgarl]

Corsair is BETTER

...?

For paying an extra 50$?

Seriously, I would like peoples to explain the me. The OCZ a really high efficiency, is powerfull enough for 2 4870 and is half the price and rated at 40C... way enough for almost any environment.

Both are offering the same advantage except that the Corsair past the 50C test. Still there, it's less efficient and that's a big minus in my book.

 

[redgarl]

You need a certain level of security, getting 100W more than your setup is really something you should invest on. Running a PS at it's full power is something I will never do since I have experienced issues with it.

At 50$ after MIR, the OCZ is quite enough and really well prized.

 

[boulard83]

IM not telling OCZ is bad. i own a PC P&C ( that is partner with OCZ ... )

Im just telling that Corsair build rock solid and efficient PSU. With very light ripple... blah blah blah.

And yes, i agree that you need more Power then the minimum required... Todays PSU are lots more efficient that 2-3 years before but its still better to stay in the 60-75% of the total power that your PSU can deliver.

EX: My rig draw 425W under full GPU and CPU load. ( this is the Highest ive seen displayed on my Watts meter using OCCT PSU stress test ) and i have a 750W PC P&C. While gaming this is fluctuating between 300w and 350w.

 

[MRFS]

That OCZ has 2 x +12V rails each @ 25 Amps:

http://www.ocztechnology.com/images/awards/mxsp_wattage_charts.jpg


The Corsair has only 1 x +12V rail @ 60 Amps:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006


MRFS

 

[xtc28]

Amperage is the key here . My 4890 pulls in some serious amperage around 30-45A.
My 4870 x2 pulls in near double that and would take more if I could spare it. The higher amperage is the best when it comes to these new cards.

 

[masterjaw]

If your just gonna run a single card then go with a corsair hx620 instead (50A in 12v rail).

As far as specs, I could see that the corsair could do better than their declared power rating. I don't know about OCZ as I haven't tried them.

 

[AKM880]

Corsair.....get the Corsair..

 

[cjl]

Amperage is the key here . My 4890 pulls in some serious amperage around 30-45A.
My 4870 x2 pulls in near double that and would take more if I could spare it. The higher amperage is the best when it comes to these new cards.

Your 4870x2 does not pull in 60-90 amps. No possible way. That would mean that the 4870x2 would pull between 720 and 1080 watts, all by itself. Considering that I have a 4.2GHz i7 and a pair of 4870x2s in CFX all powered quite happily off a Corsair HX1000, I'd say that they definitely use less than that. As for how much they really use? They can pull up to 150W from the slot, 75W from the 6 pin, and 150W from the 8 pin. That's a theoretical max of 375 watts per card, around 31A max from the 12V (and they really use significantly less than that). The 4890 should use significantly less than the 4870x2, so I would guess 20A at the absolute most for the 4890 (and even that estimate is likely well on the high side). Of course, the rest of the system needs 12V power as well.

 

[xtc28]

Your 4870x2 does not pull in 60-90 amps. No possible way.
I guess not I just used a new copy of GPU z to check again and its in the 20 A range on the 4890. I havent checked the x2 yet. I did always think that was toooooo high. Well I learnt something new today. wow! The thing I find strange is that the last version of GPU Z fluctuated alot on the amps and this version stays constant even when gaming hard. HMMMMMMMMM is this one wrong too?

 

[boulard83]

The WATTS i tell in my last post are from my ENTIRE RIG.

425W = CPU + GPU 100% load, Waterpump, 10 fans, 2 fan controller, 1 DVD, 2 HDD

IDLE : 150W
CPU 100% : 245W
GPU + CPU 100% : 425W

With these you can guess that a GTX285 Pump 180 more watts from idle to load. This give about 20amps total. A HD4890 pump nearly the same thing.

 

[Yoosty]

I'm looking at going with a different PSU than I have right now. I bought an Apevia 700w PSU and just don't feel right trusting my system with it. So, I'm looking at 2 different PSU's right now:

CORSAIR CMPSU-750TX 750W ATX12V $90 w/MIR
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

OCZ OCZ700MXSP ModXStream Pro $49 w/MIR
http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=10009502

FYI:
CPU - E8400
RAM - 4 GB, 2 sticks
VGA - Radeon HD 4890

I plan on crossfiring another HD 4890 in a year or so, so I need something that can handle that increased load- as both of these should. The Antec calculator says I need about 275w for my set-up, but I've read that you need at least 700 for crossfire. The Corsair would be my first choice since it has a little more power and tons of connectors. I'm not crazy about the modular set-up of the OCZ, as I've read that modular is less efficient but this particular unit seems to do very well in reviews. The price difference is enough that if there is not much of a gap between the two, I'd probably go with the OCZ.
I made a mistake with buying that Apevia, so I'd like to get some input from the pro's here before I make another one. And as always, if there are any other options or things that I can or should consider, LMK.
BTW, I also have an Antec Basiq BP430 430W. I'd have to buy a PCI splitter for it if I were to use it.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371023

Plus figure in the cost for shipping..

NewEgg is 3 Day free shipping.

ZipZoomFly shipping is not known and will most likely be $10 to $15 for 3 day shippping.

 

[beehew]

That OCZ has 2 x +12V rails each @ 25 Amps:

http://www.ocztechnology.com/images/awards/mxsp_wattage_charts.jpg


The Corsair has only 1 x +12V rail @ 60 Amps:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006


MRFS

I'm not really sure what the significance is of that. I wish I knew enough to draw the obvious conclusion, but alas...
Is it better to have two @ 25 each or 1 at 60?

 

[beehew]

The modXstream is a great power supply for loads between 350 and 550 Watts with a great efficiency.

For a single card setup, take the OCZ. It's way enough.

The OCZ is the most efficient of the 2 PS you have chosen with 85% at usual loads. Unless your are stressing it with higher loads, the Corsair will be a little better.

The problem right now is that there is only 2 PCIe cables with the OCZ. So if you plan to Crossfire 2 4890, take the Corsair.

If I just buy a pci splitter for about $5-7 would that do the trick for crossfire? The number of pci connectors is the only limitation there @ 700w, right?

ANyway, I have about 2 hours to make my decision, because the rebate for the Corsair is only good until 27th.

 

[boulard83]

Its all about how the Vreg are built ... a multiple rail can beat a single rail and the oposite can be true. its all about build quality.

 

[theAnimal]

They can pull up to 150W from the slot

75W from the slot.

 

[beehew]

Plus figure in the cost for shipping..

NewEgg is 3 Day free shipping.

ZipZoomFly shipping is not known and will most likely be $10 to $15 for 3 day shippping.

No, ZipZoomFly also has free shipping on this particular product. Both sites offer 2.5% cash back through Bing shopping, too, while you're at it.

 

[theAnimal]

The modXstream is a great power supply for loads between 350 and 550 Watts with a great efficiency.

Yup, just don't ask it to deliver it's rated capacity. HardOCP tried that and it failed.

The OCZ is the most efficient of the 2 PS you have chosen with 85% at usual loads.

No, actually. The Corsair hits 84%, the OCZ only 83%. The marketing BS on the box doesn't count.

The problem right now is that there is only 2 PCIe cables with the OCZ. So if you plan to Crossfire 2 4890, take the Corsair.

The other problem is the small difference of 14A on the 12V rails.

 

[beehew]

I'm hesitant to get the Corsair right now. It seems that whenever I buy a big-ticket item, I find the same thing within a week or two for about $20 less. Happened recently with my motherboard and VGA. The best way to get the price to go down on something I want-- is to buy it.

 

[masterjaw]

As a personal rule, I don't save up money on a PSU. I buy PSU that will suit my needs and will serve me for long. If you can afford to buy an another 4890, why do you hesitate on buying a reliable PSU? I don't say that the OCZ is no good. Its simply that corsairs are proven to be reliable and deliver clean voltage output.