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Old 10-06-04, 07:35 AM   #241
T.h.o.m.a.s.
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Default Re: GeForce 6800 power supply questions

i have a 400W that came with my sunflower case
P4 2.4@2.8
GF6800 unlocked running @420/1190
three hd's and e dvd drive

runs flawless
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Old 10-06-04, 11:03 PM   #242
PAUL J CHATMAN
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Default Re: GeForce 6800 power supply questions

I bought the GeForce 6800 (not GT, OC, nor Ultra) 128 DDR AGP.
The specs mention that it requires a 300W power supply. I know that
the 250W supply can handle quite a bit. But I want to be sure.

Can I still use the card with my 250W supply?

My power supply is a Bestec ATX 250-12z D (Rev. D1)
Here is the specs:

250W

Output
+12v / 14A, +5v / 25A, +3.3v / 18A
-12v / 0.8A, -vsb / 2A (peak 2.5A)

+5 & +3.3v 165W max
+5v & +12v 218W max

Input:
100-127v ~6A, 200-240V ~3A
50/60 Hz


AMD Athlon XP 2800+
2.08Ghz
512MB RAM
DVD-ROM, CD-RW, Multi card reader
winXP SP2



Paul JC
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Old 10-07-04, 12:40 PM   #243
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Default Re: GeForce 6800 power supply questions

Quote:
Originally Posted by kasperisa
I hope someone answers this question. I'm trying to build a nice PC. I am going to by an ASUS GeForce 6800 Ultra. My powersupply is an Enermax Coolergiant 480watt. it states 16a on the 12V rail, but max's out at 20. I'm not sure its supposed to be maxed for a long time though.
The only other parts in my system will be
2x 512 megs ddr 3400
Athlon 64 3500+ (socket 939)
Asus A8V deluxe
1 DVD burner
1 s-ata 120 gig harddrive
onboard sound.
4 fans.

My question. Can I overclock my geforce 6800 U
Oh.. forget. My powersupply has 5 molex, and 2 extra for s-ata drives. I would only be using one of those s-ata connectors.
So 2 molex directly to the video card. One to the dvd burner, and one for all the fans. Would that work for overclocking the card?
From my earlier post, I forgot to mention something... actually, I just read something in the manual of my powersupply. Ill copy it here. Does it mean my 12v rails are more powerful then just a total of 16amp output?

---------
Serparate 12V rails:
Independent 12V rails supply to MB/CPY and drives in order to provide stable and clean current to noise-sensitive devices, such as:
CPU, add-on cards.
Meet UL 240VA safety requirements.
----------

does that mean each molex and motherboard plug supply 16a each? not combined?
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Old 10-07-04, 10:52 PM   #244
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Default Re: GeForce 6800 power supply questions

Quote:
Originally Posted by kasperisa
From my earlier post, I forgot to mention something... actually, I just read something in the manual of my powersupply. Ill copy it here. Does it mean my 12v rails are more powerful then just a total of 16amp output?

---------
Serparate 12V rails:
Independent 12V rails supply to MB/CPY and drives in order to provide stable and clean current to noise-sensitive devices, such as:
CPU, add-on cards.
Meet UL 240VA safety requirements.
----------

does that mean each molex and motherboard plug supply 16a each? not combined?
I looked up your PSU on newegg.com to see what the actual specs are. You have a +12v1(line 1) at 16amps and a +12v2(line2) at 15amps. So to answer your question:
no, what it means is that the rail providing cpu/motherboard power has +16 amps on that rail and the seperate rail that powers all other +12 rail type devices has 15amps. 2 seperate rails. So, since its TWO +12 rails carrying 16 amps on one and 15amps on the other, then you should be fine with overclocking. It does not mean that EACH molex plug gets 15 amps, it means that all the MOLEX and every thing else that runs on THAT +12 rail has a combined 15amp available. Then the mobo and cpu also have 16 amps available on that line. Basically you have 31 amps total for the +12, however thats not really an accurate statement either. Most review sites recommend a PSU that has a high single +12 rail amp rating rather then TWO lower +12 amp rated rails. Once you get the 6800Ultra and you can overclock it fine, then dont worry about it. You do need to understand tho, that the ratings given are at 25C temp(as posted below in the specs I listed for your PSU) and NOT opperating temps which usually are 40-45C. At higher temps, the wattage drops and the PSU becomes less efficient therfore you dont actually get the amps that are specified.

Here are the specs of your PSU(notice the parts in bold):
Specifications:
Type: ATX 12V
Maximum Power: 480W
PFC: Active
Hold-up Time: 17ms min.
Over Voltage Protection: +5V: 5.5V~7.0V; +3.3V: 3.76V~4.3V; +12V1 & +12V2: 13.4V~15.6V
Overload Protection: 105%~160%
Input Voltage: 100V-240V
Input Frequency Range: 50Hz-60Hz
Output: +3.3V@34A; +5V@40A; +12V1@16A; +12V2@15A; -12V@0.8A; +5VSB@2.5A
MTBF: 100K hours at 25șC
Approvals: UL (Level 3), cUL (Level 3), VDE, CB, NEMKO, SEMKO, DEMKO, FIMKO

From this, you will be absolutely fine.
__________________
SPECS:
Alienware
3.4 p4 /200FSB NO overclock
OCZ pc3500 performance 2 gig memory
OCZ 520 watt PSU
Asus p4c800deluxe-e motherboard
2 x 80g Sata HD's / 1 x 60g IDE / 1 x 40 g IDE
1 x DVD / 1 x lite on cdrw
7 case fans plus vantec dual fan pci card
BFG 6800 Ultra OC 456/1.28 Stock air
3.2P4(no OC)3dmark03 score :13570
http://service.futuremark.com/compare?2k3=3195131
3.2 p4 @3.472 217FSB 6800u@ 425/1.28 3Dmark03: 13738
http://service.futuremark.com/compare?2k3=3195221
WIFES PC: 3.2P4/BFG 6800GT/1 gig pc 3200
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Old 10-08-04, 07:55 AM   #245
kasperisa
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Default Re: GeForce 6800 power supply questions

Thanks for all that info. I really appreciate it
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Old 10-12-04, 11:10 PM   #246
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Default Re: GeForce 6800 power supply questions

Quote:
Originally Posted by kahloq
If you ordered a OCZ 520 powerstream, it is by far a better PSU then either of the 2 links you listed. Within this topic thread, I have listed many of the features of the OCZ line of PSU's and greatly recommend them over everything else including PCp&c psu's. The price is alot better and the quality is just as good as PCp&c's OCZ's are very similiar to Tagan's internally
Just another thing to add to OCZ, two pre-wired SATA connectors. Yes you can go out and buy molex to sata power adapters, but you can also get these for cheaper
http://www.frozencpu.com/cgi-bin/fro...html?mv_pc=134

I skipped to the last page so I don't know if this was already stated, but with all the perks OCZ offers in their 520PSU such as BTX and PCI-E ready, having these little things handy is one more way of keeping future-proof.
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Old 10-16-04, 02:58 PM   #247
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Default Re: GeForce 6800 power supply questions

I have a bfg 6800gt in an Antec sx835 case with 350 watt psu that is near brand new that has problems with my p4 2.6 proc at any speed over 3050, the chip is capable of 3350 with a gf2 pro card. when I put the 6800 in 3050 is the highest stable overclock. I do have 2 80mm fans, 2 burners, 1 ide hd 2 nic cards but I would think that that is about normal for most peoples computers. I have a new enermax 465 watt psu on the way from newegg, hopefully that will cure my probs.
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Old 10-17-04, 12:12 PM   #248
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Default Re: GeForce 6800 power supply questions

I don't know if this has been posted already. If it has, i apologize but I'm not going to read every post. I found this on an anandtech forum regarding ultra p/s. http://forums.anandtech.com/messagev...&enterthread=y
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P4 2.8C @ 3.45ghz
Asus P4C800- E Deluxe
1 gig OCZ EL 3700 Gold rev.1
eVGA 6800 Ultra 447/1.14
Hercules GTXP
2 WD Raptors in RAID 0
Logitec Z5300 5.1's
AquariusII Liquid cooling system
Antec SX 840 case w/ OCZ PS 520 ADJ
3DM2K3 = 13,406 l 05 = 5236
Aquamark = 71,483
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Old 10-18-04, 05:25 AM   #249
harl
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Default Re: GeForce 6800 power supply questions

I have just instalde a sparkle 6800 GT.
My PSU it's a Levicom 420 W, it only has 2 lines (4 molex each)
(22 A)

I hava instaled in one Line
WD 120 GB ATA100 7200 RPM
Levicom Sysguard (rehobus+Ecard reader+3 Fan regulator)
DVD-R Nec2500
DVD Tshiba

In the other line the 6800 GT and the lights of the door
(my cas it's a Thermaltake tsunami)
the lights uses 5V and I belive the 6800 only uses the 12V
line so the card it's alone.

should I plug one f the DVD's the the 6800's line
or leave the sistem as is?
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Old 10-18-04, 09:06 AM   #250
kahloq
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Default Re: GeForce 6800 power supply questions

Leave it as is or move the door lights to the line with dvd's/hd on it.
__________________
SPECS:
Alienware
3.4 p4 /200FSB NO overclock
OCZ pc3500 performance 2 gig memory
OCZ 520 watt PSU
Asus p4c800deluxe-e motherboard
2 x 80g Sata HD's / 1 x 60g IDE / 1 x 40 g IDE
1 x DVD / 1 x lite on cdrw
7 case fans plus vantec dual fan pci card
BFG 6800 Ultra OC 456/1.28 Stock air
3.2P4(no OC)3dmark03 score :13570
http://service.futuremark.com/compare?2k3=3195131
3.2 p4 @3.472 217FSB 6800u@ 425/1.28 3Dmark03: 13738
http://service.futuremark.com/compare?2k3=3195221
WIFES PC: 3.2P4/BFG 6800GT/1 gig pc 3200
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Old 10-18-04, 09:33 AM   #251
Chippy
 
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Default Re: GeForce 6800 power supply questions

Here's another vote for the OCZ Powerstream 520W. I bought one of these a couple of weeks ago and its simply the most phenomenal PSU ever designed. That may sound like an overstatement, but really it isn't.

Here's a post I made about it on another forum:

http://forums.pcper.com/showthread.php?p=3153435

I may sound like an OCZ sales guy (but I am not, I assure you!). But I would urge anyone to buy this PSU. I would say its a *must buy* component.

Chip
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[COLOR=DarkRed][SIZE=1]BFG GF6800GT @ 420/1100
MSI K8N Neo 2 Motherboard
AMD A64 3200+ @ 10x240
1 GB PQI Turbo Memory 10-3-3-2.5 1T
2 x Raptor 74GB's in Raid0
OCZ Powerstream 520w PSU
[/SIZE][/COLOR]
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Old 10-18-04, 01:22 PM   #252
Oboe
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Default Re: GeForce 6800 power supply questions

I received the answer below from nvidia via email ... My question was directed at the 6800 GT GPU ... This answer does not take into account dual fans, 128 vs. 256 MB of ram etc.

Quote: "Most 300watt power supplies should provide enough power to drive the 6800GT. However, if you are into overlocking, we suggest a power supply with a combined 12v line of 15A. Do not connect any other devices (CDROM, hard drive, etc.) to this line."

My added rhoughts:

The specific amperage requirements for a given card should be placed on the card manufacturers web site ... PSU requirements listing the overall wattage requirement for a psu does not tell the whole story of what is required and these manufacturers need to list the amperage info.

Saturnotaku was right on the mark in his post ... But ... I will be looking for a PSU with at least two +12V windings, one of which will be a minimum of 18 amps dedicated to the video. This will allow the bumps created by CDroms, hdd, etc, to remain off of the video power line.

Oboe ( building a new system )
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