eVGA Woes

[Cybercat]

My friend got an eVGA 6800GT a while back. It was the first GT I've ever seen that wasn't able to get to Ultra speeds.

Later on I get an eVGA 6800NU. Reviews on NewEgg show people getting around 400/800, give or take, so I was hopeful. I get my card and it doesn't like overclocking at all. If I overclock the core, it will throttle down performance (and eventually freeze). The memory seems to have artifacts nomatter what setting except default. I even flashed the card with a modified BIOS to run at higher voltages, and still the same thing.

I mean, eVGA isn't known for having bad overclocking cards, yet how is it that the only two cards me and my friend have bought of theirs are some of the crappiest GF6 series cards we've ever seen? I'd like to think it's my PSU, or the temperatures, but my PSU is decent (Thermaltake 420W) and my GPU temps are at 70ºC or lower, along with good case airflow.

Moral of the story, I'm not buying any of eVGA's cards again, unless I find out that it's an outside factor affecting it.

[StormPC]

A Thermaltake 420 is not a good power supply. That may not be your only problem but it's a good place to start.

[Kunaak]

I just got a EVGA 6800 NU just like you have and it's been doing great up to 425/845, 3dmark doesn't like anymore then about 410/425 or so, but Aquamark3 let me go alot higher. game are pretty rock steady for me at 400/800.
only problem is doom 3

that game doesn't want to run well at all when overclocking that high on the videocard, so I had to downclock even farther at 365/750.

365/750 is literally nothing for this card, all my games play that speed just fine, including doom 3.
so I edited my Bios and thats my new default clock speed.
that way I know, any game I play on it, will be running 365/750 without me needing to remember to set anything in powerstrip to overclock it myself.

heres my best aquamark3 score with this card, 69,500
I would guess the other 2 guys that are ahead of me, have been overclocking 6800's cause thier videocard scores are higher then mine, so I had to try like hell to match them with good CPU clocks, but I came within a thousand of the top score, and thats with a unmodded EVGA 6800 ;)

http://arc.aquamark3.com/arc/arc_view.php?run=1421849273

11,100 on 3dmark2003

http://service.futuremark.com/compare?2k3=2931999

22,200 on 3dmark2001se.

http://service.futuremark.com/compare?2k1=8041484


all these scores are with a unmodded EVGA videocard, just like yours.

[Kanavit]

the 6800 is power hungry, try bigger PSU. but i think it's mostly the video memory problem, not fast enough.

[tricknasty]

i hope its not an evga 6800 GT cuz im getting one tomorrow -_- if i cant overclock it im takin it back