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Quick question: OCZ Modstream or NEO HE

D

Dillusion

Supreme [H]ardness
Joined
Oct 21, 2003
Messages
5,465
Quick quesiton before i click the checkout button:

OCZ Modstream 520w +12V 28A
or
Antec NEO HE 500w +12v 16A x3

Both are modular, and both are about 89$- but which to choose?
 
I went with the OCZ. Quietter, a single big rail, and seems to be more mature. The new antec's are coming DOA to allot of users.
 
_Korruption_ said:
Output rails are not additive.
Click to expand...
Seeing as the power goes to many different components, the load will be spread out so much that in effect the total amperage is more important than 1 big rail.
 
Oline61 said:
Seeing as the power goes to many different components, the load will be spread out so much that in effect the total amperage is more important than 1 big rail.
Click to expand...

What if a component, like an overclocked A64 needs more than what the PSU can provide on that dedicated rail? ;)
 
Dillusion said:
What if a component, like an overclocked A64 needs more than what the PSU can provide on that dedicated rail? ;)
Click to expand...
On that NeoHE that would be 192 watts. Your PSU running out of power would be the least of your problems as your A64 would be fried.
 
Oline61 said:
I'd go with the NeoHE, 48 amps vs. 28 amps is no contest.
Click to expand...

The HE 430w has a combined limit of 32A @ 12v... 48A is impossible for it, and it will shut down well before attaining that figure. Even the 550w still has a 42A limit.
 
Oklahoma Wolf said:
The HE 430w has a combined limit of 32A @ 12v... 48A is impossible for it, and it will shut down well before attaining that figure. Even the 550w still has a 42A limit.
Click to expand...
Antec NeoHE 500. 3 12V rails 16 amps each. 3 x 16 = 48.
 
Oline61 said:
Antec NeoHE 500. 3 12V rails 16 amps each. 3 x 16 = 48.
Click to expand...

According to Antec's site: http://www.antec.com/specs/NeoHE500_spe.html the 500w is 17amps per rail. 3x17=51. However.....rails are not additive. On this unit the 12v rails combined is 456watts. 456/12=38

Even if it is 3x16 you are still stuck at 456watts which is 38 amps.....not 48.

Watts=volts x amps
 
Hmmm. Antec did their math wrong. If it is 17 amps, thats 17 x 3 = 51 amps.
51 amps x 12 volts = 612 watts on the 12V rail.
 
Oline61 said:
Hmmm. Antec did their math wrong. If it is 17 amps, thats 17 x 3 = 51 amps.
51 amps x 12 volts = 612 watts on the 12V rail.
Click to expand...

No antec did their math right. The rails are not additive.
 
Oklahoma Wolf said:
The HE 430w has a combined limit of 32A @ 12v... 48A is impossible for it, and it will shut down well before attaining that figure. Even the 550w still has a 42A limit.
Click to expand...
Were talking about the NeoHE 500, no one said the 430 could hit 48 total amps. Why would the 550 have a 42a limit? The specs clearly state that 18 amps are available on each of the three 12V rails, hence 54 amps total available current on all 12V rails combined.

Spectre said:
No antec did their math right. The rails are not additive.
Click to expand...
The rails being additive has nothing to do with it. Whether it can be added in real life or not the expression 3(12x17) will always equal 612 watts, and never equal 456 watts (I don't understand how 3(12x17)=456 is "doing their math right"). Wether the rails are additive or not, the total wattage available at 12 volts is 612, the total amperage available at 12V is 48. Either 456, or 17 was a number pulled out of someone's ass because they don't go together.

Anyway it seems this is completely irrelevant as most NeoHEs don't work in the first place. :)
 
Oline61 said:
The rails being additive has nothing to do with it. Whether it can be added in real life or not the expression 3(12x17) will always equal 612 watts, and never equal 456 watts (I don't understand how 3(12x17) is "doing their math right"). Wether the rails are additive or not, the total wattage available at 12 volts is 612, the total amperage available at 12V is 48. Either 456, or 17 was a number pulled out of someone's ass because they don't go together.
Click to expand...

No it was not a number pulled out of someone's rectum and it has everything ot do with why rails aren't additive. It is due to the way most SMPS work. While the PSU has multiple 12v rails they are not additive. The 12v rails are all fed by the same single rectifier and transformer. Whatever the limit is on that rectifier and transformer (in this case 38 amps) is the combined limit for the 12v rails and denoted by the combined out put limit of 456 watts. 456watts/12v=38amps. Those 38 amps can be distributed in many ways but the most that can be fed to any one rail is what that rail is rated at (in this case 17 amps).

Anyway it seems this is completely irrelevant as most NeoHEs don't work in the first place. :)
Click to expand...
Somehow I seriously doubt that.
 
Spectre said:
No it was not a number pulled out of someone's rectum and it has everything ot do with why rails aren't additive. It is due to the way most SMPS work that you do not understand. While the PSU has multiple 12v rails they are not additive. The 12v rails are all fed by the same single rectifier and transformer. Whatever the limit is on that rectifier and transformer (in this case 38 amps) is the combined limit for the 12v rails and denoted by the combined out put limit of 456 watts. 456watts/12v=38amps. Those 38 amps can be distributed in many ways but the most that can be fed to any one rail is what that rail is rated at (in this case 17 amps).


Somehow I seriously doubt that.
Click to expand...

Thank you for explaining that to me! That explains why I couldn't figure it out.
Sorry if I came across as a jackass, but I couldn't figure out why the math was off. Anyway I sincerely hope that the NeoHEs work, but there are two threads in the PSU forum where people are having major problems.
 
Oline61 said:
Anyway I sincerely hope that the NeoHEs work, but there are two threads in the PSU forum where people are having major problems.
Click to expand...

I know....but as someone who was bit by an Ultra that died when things looked bad......it all turned out to be not as bad as it once looked. I would give it some time.
 
well so far, after figuring out the semi-problems i was having, i can't really complain about the performance. i was able to game for a solid hour straight in F.E.A.R. without any kicks to the desktop, etc....i'm hoping to get some time this weekend to play with my current overclock with my cpu/memory and 6600gt's and see if i can squeeze out some more performance, because i have a feeling my 450 modstream was holding me back some...here's to hoping everything works out for the other NeoHE owners...
 
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