Maybe its a power problem? Don't wanna insult your intelligence but maybe you should check to see if the molex connector is plugged in.

 

im not sure, but my best bet is the driver(considering that its not a power prob). but i doubt that its a power prob unless u overlooked that one. a lower driver ver perhaps? or the one that came with the card maybe. where's ur 9700 now sxamiga? and uh, side topic, how do u pronounce sxamiga?

 

Sound like a power problem to me. What's the PSU you got SX? The fx5900 takes more power than your 9700pro. Plus your Oc'ing your 5900 so.

 

It does indeed sound like a power problem. Try disconnectiong your cd-roms and run loops of dawn and 3dmarks.

 

The manufacturers recommend a 350W PSU as a minimum for the GF FX 5900 Ultra or a 300W PSU for the GF FX 5900 sxamiga, check that out

 

iirc he does have a 350w.

 

I think so too, but maybe his system has current peaks and maybe is near PSU's current deliver capacity that the PSU can't handle causing the restarts.

 

It does sound like a power problem and since he got a newer, faster card it is probably sucking too much juice for it to handle. Try getting a 400w ps or if you are willing to spend $ on a really good ps then get either an antec true power 380 or 430w. Here are some links to antec power supplies.

400w antec 2 fan ps
antec true power 380w
antec true power 430w
Recently I put a true power 330w ps in my dad's comp and it has been working perfectly and the dual fans have helped bring down the temps a bit (they're still WAY too high). I definatly reccomend taking a look at them. My next comp is gonna have a t.p. 380 in it .

 

I would reccomend the 430psu. Just a bunch of extra juice. I use an enermax whisper 350psu and it has no problems. Mind you, im not running a beefy card like the 5900

 

It's either power or heat.

 

I'd say power. Lack of power can cause some wierd probs....

 

I doubt it but try official drivers, especially 4 a new card like urs, if that doesn't work then maybe u should get nvhard:lol:then check ur power cable and ur directx version. U can get nvhard here http://content.guru3d.com/index.php?page=nvhardpage&menu=5, once uve tried it u'll never need rivatuner, rivatuner doesn't support ur drivers so take my advice and get nvhard.

 

Strange. I'm using Dets 44.71 and Rivatuner works fine with it. It does state that it hasn't been tested with these drivers, but it works nonetheless.

 

It's either power or heat.

yup...could be heat as well; I had weird problems some time ago (from games crashing to the pc not recognizing the gf4 anymore at all) and adding some case fans solved the problem, even though I hadn't overclocked anything...

 

It could be that ur motherboard shuts down when it reaches a certain temp(3d games cause ur gfx card 2 heat up a couple degrees) u could change it in the bios and if ur case is closed, i suggest u open it and put a huge fan right up 2 ur open case.

 

If you buy a new power supply then bear in mind that the overall output is not the be all and end all, the max amps (not peak) is what you want to look out for, try to get one with at least 35a on the +5v line (this info can be found on the side of the psu) and about 20a on the 12v.
As long as you get a branded one you'll be fine Im sure.

Mines a 550w with those amp specs above and it runs my abit/overclocked cpu/dvd drive/cdrw drive/4 hard drives + a few fans fine.

 

It may be your power supply just what they told you but check this out GF FX 5900 problem
http://www.chipzilla.com/?article=10542

 

Evga originally shipped GeforceFx5900u's with a bios that overclocked the chip's speed to 500/850 creating lots of stability problems with them. Evga later updated the bios with standard chip speeds for their 5900u's.

 

even at this frequency they still got problems so this is not an overclocked problem and its not limited to evga only since all the boards are manufactured by nvidia
2D: 300/850
3D: 475/850

http://www.evga.com/community/messa...X+Family+Forum&Topic_Title=5900+Ultra+issues&CAT_ID=1&FORUM_ID=17&TOPIC_ID=1090

 

Not all manufacturers use nvidia boards. Companies like evga,PNY,bfg,etc. use nvidia boards but most of the taiwanese manufacturers use their own higher quality PCBs.

 

most of the taiwanese manufacturers use their own higher quality PCBs

I dont know about that but if you check this site. gainward popular for its golden sample card and msi uses nvidia reference design and both are taiwanese manufacturers.

http://www.gamepc.com/labs/view_content.asp?id=3x5900u&page=3

 

If u base that on the picture then ur wrong, notice they all have the official nvidia heatsink?No manufacturers do that, not evga, pny or pine, gainward uses a red pcb with a larger fan.

 

they just use the nvidia reference design board and added their own improve cooling solution.

gainward pic http://www.hardocp.com/article.html?art=NDg5
http://www.hardocp.com/image.html?image=MTA1NjI1NjMyNUxKUVhNT29ZTHdfMV8zX2wuanBn


msi pic click on the picture to zoom
http://www.msi.com.tw/program/products/vga/vga/pro_vga_detail.php?UID=477&MODEL=MS-8929

chaintech pic although the board is color blue check the parts placement they are the same with the other boards. http://www.chaintech.com.tw/tw/images/Products/Vgacard/A-FXFU98_L.jpg

 

The gainward is still a sexxxy beast. The chaintech one is pretty cool too.

 

They use a modified pcb 4 overclocking, a reference won't OC as well as gainward cards will. Read this if u don't believe me http://content.guru3d.com/article.php?cat=Videocards&id=54 and make sure 2 read the whole page.