Will this PSU support a 9800GT?

mep916 said:
Thank you. It's not ****ing rocket science. Buy a quality unit and enjoy it. :rolleyes:

:)
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While I agree with everything you say Mep, it has brought out an unanswered question. I believe it is relevent to find the answer and will gladly start another thread if you see fit.

I'm not so technically minded that I can go in and put my opinion on this but I am interested in the question being "debated" :confused: especially as research on a site is all we have at our disposal.
 
TFT said:
While I agree with everything you say Mep, it has brought out an unanswered question. I believe it is relevent to find the answer and will gladly start another thread if you see fit.

I'm not so technically minded that I can go in and put my opinion on this but I am interested in the question being "debated" :confused: especially as research on a site is all we have at our disposal.
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Well, if someone can provide a clear answer that everyone agrees with, that's fine, and I have no problem with a debate, so long as said debate doesn't provide confusion to the OP and offers a good end result. Sometimes these discussions go back and forth without any gain to anyone. Or maybe I'm drunk. :P
 
All I,ve been trying to say is sure the 12V CPU rail holds amps./keeps/isolated/separate (whatever word bigfellla decides to use at the time) But its not the max amount of amps that the P/S has listed on the side for that rail. They have a max and minimum, the minimum is what is held.
 
Please reference yourself Strangle, so far you have said a lot, but referenced nothing. You claim that this is MY view and I am incorrect, and since this discussion is continuing I would like to point out that I have provided 2 references (ATX 2.2. standard, PC Power & Cooling tech brief), and here is a third:

"The problem with multi-rails, is that power tends to get stuck on the individual rails. If the PSU, for example, allocates 36 amps of power from rail 2 to the CPU but the processor only consume 22 amps – the rest cannot be reallocated to the GPU or hard drive array. " http://www.maximumpc.com/article/single_rail_versus_multi_rail_power_supplies Senior Editor, Maximum PC, 2007.

All saying exactly the same as me - that is, the underutilised current on 12V2 is isolated/seperate from the rest of the system. Basically anything that is not used by the CPU on 12V2 is lost (because it cannot be accessed elsewhere).

The only terms i have used are isolate/seperate in accordance with the documentation.

mep916 said:
Well, if someone can provide a clear answer that everyone agrees with, that's fine, and I have no problem with a debate, so long as said debate doesn't provide confusion to the OP and offers a good end result. Sometimes these discussions go back and forth without any gain to anyone. Or maybe I'm drunk. :P
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I am not trying to be difficult here, but assuming Strangle still wont accept the above (coz i have been saying the same throughout), maybe if we get more practical we can see where each of us is coming from.

Practical Example
A given non-EPS PSU (ATX2.2) has 2 x 20A rails, where 12V2 is isolated as per the standard.
For argument sake, the CPU requires 5A, and the rest of the system (gpu's, hdds, etc) requires 21A (12V1)

So 26A in total.

Do you believe the above PSU (in this example) can deliver the required 21A to the rest of that system? If so, how? References would be good too where possible.
 
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bigfellla said:
Practical Example
A given non-EPS PSU (ATX2.2) has 2 x 20A rails, where 12V2 is isolated as per the standard.
For argument sake, the CPU requires 5A, and the rest of the system (gpu's, hdds, etc) requires 21A (12V1)

So 26A in total.

Do you believe the above PSU (in this example) can deliver the required 21A to the rest of that system? If so, how? References would be good too where possible.
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That would not work anyway. It has two 20 amp max rails. If the system tried to pull 21 amps from the 12V 1 rail the P/S should shut down by the standards your using regardless of how many amps are really held on the CPU 12V 2 rail.
 
Exactly! Thus my point about the limitations of the rails under ATX 2.2. standard. That was all i was saying. A combination of 240VAC safety and ATX 2.2 means that the PSU in this thread (OP's ) will not supply the required power. And it is because of this isolation that the PSU cannot provide the remaining amperage to the rest of the system, and it is why EPS and single rail design is taking over again.

I never said it holds current, simply that it will isolate it from the rest of the system.
 
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Well, Well, we finally agree on something:D:D. Really the only thing we have in disagreement is how many amps ( as in the max or minimum rating of the rail) are isolated on the 12V2 rail.
 
LOL After reading back on your posts, i guess we misunderstood each other. But i am still maintaining that the full rail capacity is isolated.
 
thanks man, as i said earlier, you are a respected member, so no offense was intended - and i do like a good discussion as others here know.
 
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Thanks bigfella and Stranglehold, I've been following in the sidelines and learnt something from this and hope others have instead them thinking of adding the amps together or dividing the watts by the volts. :) before recommending a PSU. It's a limitation I never knew on dual rails.

If ever I recommend one I'll make sure its a 1kW one to cover myself :D
 
interesting point though, my server PSU has 4 12v rails. Is that one for the CPU, then 3 for whatever, or is it 4 dedicated for each multiple CPU, and none for cards etc... ?
 
TFT said:
Thanks bigfella and Stranglehold, I've been following in the sidelines and learnt something from this and hope others have instead them thinking of adding the amps together or dividing the watts by the volts. :) before recommending a PSU. It's a limitation I never knew on dual rails.

If ever I recommend one I'll make sure its a 1kW one to cover myself :D
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not all multi-rail psus do, only those that are not EPS certified.

jdbennet said:
interesting point though, my server PSU has 4 12v rails. Is that one for the CPU, then 3 for whatever, or is it 4 dedicated for each multiple CPU, and none for cards etc... ?
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its probably an EPS psu which is different

StrangleHold said:
Damn it was almost over and here we go again.
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lol
 
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Sorry if I came across as a jerk. I've seen hundreds of debates that go nowhere, so I thought this was gonna be another. Nice job guys. :D
 
bigfellla said:
No you weren't a jerk mep, you clarified the objective as a good mod does.
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free-love-smileys-888.gif
 
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