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problem with power needed????

I

investwisely

n00b
Joined
Aug 19, 2004
Messages
15
I ahve the following:
Antec Case 350W PS
Asus P4S800D E Deluxe MB
2 sticks PC 2700 512mb KIngston DDR
BFG 6800GT
2 harddrives - 120/80gb
1 DVD-R
1 CD-RW
6-1 memory reader
Samsung 193p

My system looked liked it was working fine and suddenly the desktop background
graphics had darjer bluw with faint white lines (4 horizontal going thru) I tried making all adjustments. Now granted I was also fooling around with overclocking my CPU but restored to default. The power supply is stock when I bought the case a few years ago.
I ran some program on the web and it estimated I needed 362W PS! I tried disconencting 1 CD/RW which they assume consumes 20W and the graphics issued disappeared and everything looks great again. I am now thinking that I should replace the PS? Looking at a Antec True 430W. Is this sound like a PS issue? I do want to overclock at some point also.
 
Yea you need a new PSU. I'm surprised it didn't show problems when you built it with that 6800 in there. Don't skimp on power supplies get a good name brand. I've always trusted Antec power supplies and you can get a good 550w for right at $100
 
investwisely said:
I do want to overclock at some point also.
Click to expand...


how seriously?

check the Watts dont mean Jack sticky
and ask yourself do you need a supply to simply run that rig
or do you need one as an infrastructure investment
and how seriously your going to pursue overclocking
 
I can do this in the Bios. I have seen 2.8C OC to 3.2 with stability. Right now though it bothers me that a week after installingBFG 6800gt, my system is flickering, not booting sometimes and actinf weird. When I removed a device from the chain, it worked fine. This tells me that it is a PS issue. Now, I know watts aren't everything but if I had to decide between Antec TruePower 430/480/550, which one should it be?
 
its the proper distribution of amps per rail that is the issue
what you have in Watts these days are PSU heavy on the +5V rail
which is what PIII some P4 and Athlons where powered off of
while newer more powerful CPU are now being powered off the +12V rail
as is the auxillary power for the Graphics Cards

so you have PSU rated with a high wattage, but supplying alot of it as power on rails you wont be using in some configurations, so read that sticky
use the calculator, figure out your needs, build in a safety margin

and then ponder the rail stability and AC Ripple portions of the equation in light of your stated goal of overclocking, then consider if you want to pony up more $$$ now, for a PSU that will last you through a few boards or simply one to power your current rig

your options are either a basic education so you can make an informed decision
or blindly trusting the advice based on frequency of people posting to this thread
your stated goals, if taken seriously and without qualification would lead me to recommend a $200 PSU

but then Im unable to judge exactly what your intentions are
you maybe able to simply use a $75 PSU with nearly the same results

PCP&C Turbo Cool Express $200 (for comparision purposes a 600Watt PSU)
Fortron 530 $75

overclocking is both an art form and a lottery
and power is an important component of that
like any troubleshooting process the key factor is elminating potential variables
the closest you can get to eliminating power as a variable cost $200 plus a power conditioning scheme for the PSU (read UPS)
 
I ran the program to analyze rails and I got the following:

1) 3.3v 11.2A
2) 5V 7.9A
3) 12V 17.4A
3.3/5V combined 76.8W
All 286 W

I used a Geforce 4 but I will have to assumed 6800Gt adds some to 3.3v and 12V

My current Antec 350W is rated as follows:
Max Dc
3.3v 20A
5V 33A
12V 15A


5v/3.3V - 180W
all combined 323W


So correct me if I am wrong but the 12 V is the problem and that makes sense since I disconnected a CD and regained some more on the rail. Does anyone know the power on the 3.3V for the 6800GT? The 5V is probably ok and I am lacking on the 12V
 
Power Consumption of Contemporary Graphics Accelerators. Part I: Graphics Cards on ATI Chips
Power Consumption of Contemporary Graphics Accelerators. Part II: NVIDIA vs. ATI

that Antec was rated at 25C so unless your sitting in a freezer, its likely your actual +12V amps is closer to 10A (consider its likely exhausting the CPU Heatsink)
of course your not actually using all those amps at the same time, but yes, CPUs are now powered off the +12V rail, whereas old mobos used the +5V rail

your trying to use an old school +5V geared PSU on a +12V geared mobo and definately need to upgrade, the question becomes how far?
into the next gen (ATX12V v2.0) with the 24 pin connector and PCI-E video connector, dual +12V rails

or simply something that will run that board (ATX12V v1.3) with a 20 pin main and single +12V rail
 
I have tried researching all the threads. I do not plan on upgrading for 3 years.
I just did my major upgrade, CPU/MB,GPU. I was looking at Antec 480/550 True or the Fortron 530ATX or Fortron 550EPSV. Please juts a quick summary on what EPS gets me.I noticed Fortron EPS has a 12V/15A and 12V/.8A spec (2 lines)?

Antec 480 is +3.3V@30A;+5V@38A;-5V@0.5A;+12V@22A
Fortron 530ATX +3.3V@30/17A,+5V@44/24A,-5V@0.3A,+12V@16/28A,-12@0.8A,+5VSB@2A
Fortron 550EPS +3.3V@27A,+5V@29A,-5V@0.3A,+12V@18A,-12V@0.8A,+5VSB@2A


Thanks again. This has been a good exercise. Learned about power. Refreshed my EE background. Too bad I got corrupted by the sales job. That's what I have an Apps Engr. for now. Still like to tinker though.
 
EPS12V is for workstations and servers
translation dual CPU
it has double the auxillary +12V pins on the mobo connector (8pin vs 4 pin)
and it has the 24 pin main power connector that was subsequently adopted by the ATX12V spec (v2.0)

a compliant EPS12V PSU will have from 3 to 4 +12V rails
one powers the drives and other peripherals
the next onboard components, and the third processors
(in the 4 rail version each processor gets its own +12V rail which is otherwise split in the 3 rail version)

for comparision an ATX12V v2.0 combines the onboard and CPU into one rail, and the drives onto the other (including the video card aux)

an ATX12V v1.3 has a single +12V rail

the latest spec was pumped up for PCI-Express hense the 2nd +12V rail
and ideally youd get a PSU with the new PCI-E power connector (6pin)

http://www.pcpowercooling.com/products/power_supplies/highperformance/turbocools/510/index.htm
http://www.pcpowercooling.com/products/power_supplies/dimensions/mb_T51EX.htm
http://www.pcpowercooling.com/products/power_supplies/dimensions/dim_T51EX.htm

note the PCP&C Turbo Cool Express is a single +12V rail supply
it can get away with that, because its also the tightest regulated PSU on the market with output line regulation at 1%, and the lowest AC Ripple available

while its compatible its not compliant
whereas the Fortron, is a single rail as well, but has the 20 pin not the 24 pin and lacks the PCI-E video connector

for mobos that dont have the 24 pin connector on the mobo, you are likely to be able to connect it anyway, just leaving the extra 4 pin hanging off
 
Do the manufacturers spec. anywhere 2.0 vs. 1.3? If I see for example the fortron 530 and the 12V spec. is ,+12V@16/28A, this would be 2.0 correct?
 
nope, first (16) is the rated amps, 2nd (28A) is the peak amps
peak amps is something that would occur for a fraction of a second

however Fortron is notorious for underating their rails
(the opposite of most manufacturers)
for a good ATX12V v1.3 supply Id recommend it, just put one in my brothers box
for a ATX12V v2.0 PSU Ive been recommending the Antec Neopower, however some of the new gen of PSUs seem to have signal issues with some mobos
(they are likely conforming to the new BTX PS_ON signal specs, while the mobos arent)
and then in my dual Opteron Tyan K8W workstation with enough RAM to ransom a King
Im running a PCP&C Turbo Cool (In EPS12V trim, but still just compatible not compliant, with a single +12V rail)
 
Received my Antec true 430. It did have 26A on the 12V not 20A as specified on their web site and Newegg. I swapped with my old supply and wala same problem with my display. Then I decided it was probably a problem with the AGP on the MB. Lastly before I called Asus for an RMA I used the 193P monitor on another system and the same problem was there, so the issue is with my 193p. Samsung will send a replacment. I still assume that I should keep the new Antec over using my olf Antec 350W that had 15A on the 12V. What do you think?
 
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