i have a xfx5870xt should i flash for better oc and with what bios now max 1060/1350 on stock cooling?
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i have a xfx5870xt should i flash for better oc and with what bios now max 1060/1350 on stock cooling?
I've got a Visiontek 5850 I just bought to replace my 4870x2. So far I've loved the thing. However, I'm not as satisfied with its overclock as I could be. I get 960/1250 stable at 1.27V in all games and benchmarks, but at 1000 core no matter what voltage (up to 1.35) my card is unstable in L4D. I can run Vantage, heaven, furmark, but anything around 1050 is unstable even with stock memory and voltage set to 1.35.
It seems like I've just got a weak GPU, with 1.27 volts max gpu core is 960 whereas I see others doing 1050 at 1.27. I'm thinking about flashing another bios on the card and seeing if there is a difference in what I can max out.
I also find it odd that I can get L4D to crash my 5850 when no other game/benchmark I run ( I played bfbc2, supreme commander 2, anno 1404, dirt 2) each for about 2 hours and never had a crash at 1000. Yet 1000 on L4D crashes with artifacts after about 8min. I noticed someone else on XS said the same thing about their 5850 and L4D2.
Anyone find a bios flash helped?
I doubt a new BIOS would help.
Nice charts.I am sitting on 875/1150 on 1.1v, but what the chart needs is a Brand column. See which cards get what. Mine is an XFX 5850 non XXX
okay, that is a lot of pages to read through...
- how do you guys get CCC to increase the maximums of the sliders in overdrive? mine is maxed at 775/1125... i saw in the original post that if you dont want to use atitool (which i do not) you need to flash... so is it just MSI owners that get the 1500 max?
- does increasing the GPU voltage increase the VRM temps? my liquid-cooled gpu runs very cool, but the vrms already get hotter than i would like them to.
Sweetness!
http://www.techpowerup.com/gpuz/28ar9/
http://i47.tinypic.com/rcj6o4.gif
http://i47.tinypic.com/mr8sxk.jpg
All on air baby.
VDDCs 38*C under load on air? how is this even possible?
fan at 100% speed really help alot for vrm temps
Look at fan speed... that and open window with cool winter air. :up:Quote:
Originally Posted by AndrewZorn
Anyway, I used Furmark to test that setting further and it locked up in about a minute. I checked the VDDC current and it shot up to 68Amps which was like double what I've ever observed from any HD 5870 during operation. Either Furmark is one hella crazy program or GPU-Z ain't reading that right.
It's Furmark, it just canes the crap out of the vid card. Personally I never use it for more than 1 minute, just use it to see the volts and VDDC Phase temps briefly and thats it.Quote:
Originally Posted by Intratech
Wow! great clocks. you were able to get that using only 1.16 volts? I'm using 1.18 for stable gaming 900/1140. I haven't really pushed to see if it will do 1k stable.Quote:
Originally Posted by Intratech
Thanks. :D
Yes, look at the screenshot for the GPU load and the time it was running.. it was at default voltage. It was stable for everything else apart from Furmark which caused a lockup in about a minute. Someone told me not to use Furmark to test for stability so I'm going to loop 3dmark05 or 06 next time.
Has anyone noticed that more voltage actually had a significantly detrimental effect on their overclock of HD 5850? For example...
1.125V/900/1250 - stable
1.137V/900/1250 - slight artifacting
1.149V/900/1250 - significant artifacting but then...
1.187V/975/1250 - no artifacting, stable
It's like the voltage has to scale with clock speed, i.e., pumping even slightly more volts at certain clock actually has a negative effect and makes the card more unstable. This is not a one off thing, I can pretty much produce it at will.
I might test out that theory with the Asus HD 5870 actually. Something similar was puzzling me about it, at times it was stable at a certain clock but at other times it would just artifact like mad so maybe the vGPU I was using might be causing it. I'll check that out over the weekend.
Yeah, it would definitely be interesting to know. I know that 5870 vs 5850 is a bit of an apples to oranges, maybe more like granny smith to red delicious :p:Quote:
Originally Posted by Intratech
Anyway, I'm pretty sure this is not a fluke but a lot of people don't look at this kind of stuff. It is puzzling though as it definitely behaves as though voltage scales with core clock and more volts is certainly not always better despite the cooling. It's like the cards have certain voltage "sweet spots" for a given clock. I'm still waiting on my second HD 5850 to test this theory out on as well.
That'd be perfect for just about every overclocker with a 5850 that isn't satisfied with his clock speeds. However I am pretty skeptical of it. I guess there could be some interference except at certain voltages, but that's far stretched I think. I'm going to test this idea with my visiontek 5850.Quote:
Originally Posted by dejanh
I've been hoping for 1050/1300 stable but I can only manage 960/1250, not a big difference but still.
:confused: Not sure how this would be perfect for people overclocking... :shrug:Quote:
Originally Posted by GregUMR
Anyway, I did some more tests and definitely my card behaves this way. I tested 1000MHz core at 1.225V and then at 1.237V and while there were no artifacts at 1.225V at 1.237V the artifacts started within the first 2 minutes of test. Then I increased the core frequency to 1005MHz and I managed to go 10 minutes without artifacts. Then I increased to 1010MHz and I went 20 minutes without artifacts.
So very, very strange. It could be some unbelievably weird coincidence that I keep on hitting every time, but I doubt it. It's not the first time I was able to reproduce this either.
you running furmark for your tests?Quote:
Originally Posted by dejanh
Running Furmark 1.8.0, ATITool 0.27 beta 4, and Kombustor for general stability tests, then Crysis Benchmark, 3DM06 and Vantage for gaming stability. Basically the whole suite. I observed the same type of behavior with each tool.Quote:
Originally Posted by ReverendMaynard
Edit: I don't necessarily see this as a problem, just as an interesting quirk. I just did ~1h of ATITool with no artifacts at 1.225V and 1000/1250, bump to the voltage and artifacts start right away, bump down and artifact disappear. In Kombustor this instability will show as flickering of the MSI fur generally, sometimes actual blocks will appear.
My new BABY!
http://www.abload.de/thumb/2400029dg.png
Watercooled emert, right?
Yes!
EK Plexi Nickel!
It's a dream though...but more isn't possible!
I don't know why? I gave him 1,4V and 1150 on core sucks! 1410 on mem either!
Yea, it so obvious that you need more gpu power, lol!
Is this a good score with 2 cards... I can't really OC much without it crashing...
http://img25.imageshack.us/img25/8656/5870x2.png
My 5890!
:D:D:D
http://www.abload.de/thumb/graka2252u.png
:D:D:D