i can't get my XFX 6800Gt past 390mhz core :( i have flashed my bios to 1,4v. my card just sucks! :mad: mem is 1100mhz
Printable View
i can't get my XFX 6800Gt past 390mhz core :( i have flashed my bios to 1,4v. my card just sucks! :mad: mem is 1100mhz
Does your card crash when you try higher clocks, or is it simply not possible for you to set the clocks higher? If it's the the latter, then it's probably the internal driver test holding you back. Try disabling it in rivatuner.Quote:
Originally Posted by Prince Eugen
http://skroting.net/images/riva.jpg
Well, power is clearly an issue. If I read one more moron on any tech forum say "nobody needs a 500W+ PSU" I will flame the crap out of him. :flame:
I added a second PSU I had lying around to run all drives and fans. At 1.4v, I was able to go to 470 in Unreal Tournament 2004 (reports at 468 in Riva for some reason)! My previous high was 450, but I wasn't able to go much over 400 lately, after adding some drives and fans.
I haven't tried 2001 yet.
Another thing I noticed is that if you creep the clocks up slowly in RivaTuner, you are more likely to have success. If I jump from 350 to 470, bam!, colored snow and reboot. But if I go 350>400>450, etc., it seems to work.
I just flashed back to 1.5, so we'll see where this goes.
Notice top right corner of attached screenie.
if i clock higher, in some games artifacts show up and that kind of crap ;)Quote:
Originally Posted by Bradbury
richt now iam sitting on 380/1100, iam scared that if i leave it on 390/400, that my card is going to hell. but not sure about that, if i clock the gpu on 390mhz iam seeing almost no artifacts.
ps. srry for my bad gramma, englishe is not my mothers tounge ;)
You don't need a 500W+ PSU :DQuote:
Originally Posted by uclajd
No really, you'll need a clean 12V line, and I mean a very clean 12V line. Some Antec PSU's have a molex at the back. By only using this molex, I gained about 10-20Mhz.
Yep, I noticed that if you set your clocks to 470 it will report as 468. Even 3dmark.Quote:
Originally Posted by uclajd
http://www.xtremesystems.org/forums/...id=22831&stc=1
It's cause you can't set something to clock at exactly any specific speed, it has different increments and so 468 I guess is the closest to 470. No problems if thats what you were thinking.
Well, I've noticed some weird stuff that may be obvious to a lot of you.
Yes, my Aspire PSU sucks, but I'm still in paralyzed-by-indecision mode WRT upgrading. With all this talk of 700W Zippys and 800W PCP&Cs, one has to think long and hard.
Yesterday morning, I hooked up a second PSU (Antec 350) to control all fans and drives. So I was able to run UT 2004 fine for an hour plus with my 6800 GT at 470 @1.4v.
All day long I'm doing stuff on my PC.
Later in the day, I try to run UT 2004 overclocked, and I can't do anything over 400 stable, colored snow lockups. WTF? I thought it might be that the one remaining item (other than mobo and GPU) powered by the Aspire (switched it to the Antec later) was my Vantec PCI card, and I had turned that way up (it is variable speed). 8 LEDs and two fans turned all the way up surely sucked some power. So I turned the Vantec down and I got a little higher OC, but not like the morning (how ironic though that a Vantec fan card can actually hurt one's GPU OC!).
I was baffled all day as to why in the morning this card would run fine at 470, but would lock at 420 later in the day! Yeah, the ambient was a little hotter, but the card is watercooled and the temps barely went up. That couldn't explain the disparity in clocks.
Then I read some threads here on UPS (uninterruptible power supplies). I've had one powering my system for some time. But it also powers my monitor and a few other things, like my Vapo (if power fails, what good is an overclocked CPU without a Vapo and a monitor?). But it occured to me that this rather weak UPS (500v 300W) was getting drained with all that stuff hooked up to it. So I unplugged everything from the battery outlets but the PC's PSU. I let it charge overnight.
This morning, I ran UT 2004 fine at 460 @ 1.3v. I'm sure the UPS unit was providing the extra voltage stability.
Lessons learned:
* Get a real PSU;
* Get a hefty UPS, and only power the CPU/GPU off of it, & use the weaker UPS for monitor and Vapo;
* The 6800 GT loves power and is finicky about it.
Frankly, I am tired of the quirks of the GT (e.g., power issues, 3DMark crashes) and I am going to sell the GT and get an XT PE. :cussing:
Will the NVSilencer 5 on a 6800GT cool better than the stock HSF?
After some 3dmark runs, my card max temps were 58-59°, with Silencer 5.Quote:
Originally Posted by xgman
Not to bad, IMO.
I've just finished 3dmark 2003 @ 473 Mhz :D
Still on aircooling :)
http://service.futuremark.com/compare?2k3=3649129
My card has ZERO artifacts or it will crash with garbage filling the screen. What the heck? Temps are like 37 idle on it - very good IMO. Should I add volts on the 12V rail?
I.e. I can loop 3dmark2003 @ 430 @ 1.4V and it will crash in CS:S @ 420 (hard-lock, I mean) or 415 in '2001 :grr: :cord: