whats a good OC for a 4830?

[Rifter]

Since my CPU let me down im going to OC my video card now, what can these things get up to? and what is a safe GPU temp? I have a sapphire 4830 with the fan set to 50% and at stock it idles at 32c and goes up to 45c after hour of crysis. Right now im using the ATI tool to test artifacts with a core clock of 625 and stock memory and its running at 55c after 15 min. Also is it normal for the fan to be REALLY LOUD at 100%? I mean i have 4x120mm fans 1x140mm and then a 92mm on CPU cooler and the 80mm on the PSU and at 100% that video card fan is easaly twice as loud as the rest combined. Thanks!

 

[videogames101]

It's quite normal to be wicked loud at 100%, also, that card can easily take temps of about 80C, so 45C under full load is actually rather chilly. Keep OCing until you get artifacts, lose stability, or you break 70-75C under load.

 

[Rifter]

thanks ill ramp it up! I hate waiting 15 min between OC boosts though to see if it artifacts but at least its working well at 650 now, 70c huh man these can take some heat then. Do aftermarket coolers work well on these? i noticed the stock cooler does not have heatsinks on the ram just directs air over them from the HS fin design.

 

[Rifter]

one more thing, i just noticed im about to hit the 700mhz limit of the ATI drivers for OCing and the version of ATI tray tool im using for artifact testing has the OC tabs greyed out, what tool will allow me to go beyond 700MHz, is there some way to hack the drivers to allow more than 700?

 

[Rifter]

ok i installed rivatuner and am now using that, raised fan to 70% and at 725Mhz core its running at 45c under artifact testing, why were these cards clocked so slow by default?????

 

[error8]

Originally posted by: Rifterut
why were these cards clocked so slow by default?????

To be slower then 4850.

 

[Rifter]

whats a 4850 default clock? man im glad i didnt spring for a 4850 lol

 

[AzN]

Vid cards can easily withstand more heat than CPU. ATI video cards tend to have higher temp threshold. The last ATI card I had ran near 90C without hick up.

Even if you clock higher than 4850 default clocks you are still missing texture units and Stream Processors. You need to be over 700mhz to be equal to 4850 625mhz.

 

[Rifter]

its burning in nicely at 750/1000 right now with the ATI tool artifact test, fan at 100% and it sounds like a F-16 but its staying at a chilly 57c, im going to go get a new wireless keyboard i hope its still running no problems when i return in a hour.

 

[AstroManLuca]

4850: 625/993 (800 stream processors, 40 texture units)
4830: 575/900 (640 stream processors, 32 texture units)

BTW, FurMark is a better artifact tester. More demanding.

 

[way2fast91]

FYI, Rifterut I have the same card and have ATI CCC running it at 690/925. I didn't use artifact testing software, I used Fallout3 and L4D and discovered that in game on both titles, anything more than that would produce some very mild artifacting. It got worse the higher I tried to go on the memory. I believe this is in part due to the memory having nothing to assist with cooling it. Any way, if you can game without the issues I had at 750/1000, then awesome, but beware you might find that when you get in game you are seeing little green spots in shadows or strobing or non-textured surfaces. My temps never break 50C currently, but alas I still have the issues.

 

[Rifter]

the ram will go to 1000 but only if i keep the clock under 750, it will go to 835 on the core with the memory at 900, i think thats what i am going to keep it at. 835/900 seems to add about 5 FPS to crysis over stock, i was getting 15-40FPS stock and now never goes below 20 and peaks near 50, at 1360x768 2xAA Man this games looks awesome i gotta buy the full version im just running the demo now.

 

[error8]

835mhz is crazy for this card, man!!

 

[Tempered81]

woot, nice oc! what happens at 850mhz, hangups?

heheh.

 

[Rifter]

the monitor goes blank and it hard locks at 850+ after 10-15min, temps also hit 70+. At 835 its stable and stays below 65c with fan at %70, im impressed with this card, i paid $116 CDN and its worth every penny.

 

[kmmatney]

Wow, that's a pretty serious overclock!

My HD4830 runs at 700 Mhz Core/ 1065 Mhz memory

The core is pinned at the maximum that CCC will allow. I've been pretty happy with that, and my card runs at 54C at load, with the fan around 30%. I couldn't stand the fan at 100% - that's just too loud. About 50% fan speed is the most I want to hear. I have a very quiet case, with resistors to slow down all my fans, so the video card is the loudest component by far at 50% fan speed. I just set the fan speed to automatic, and I've been happy with the the performance and quietness of the card.

The memory speed of 1065 is from the auto-tune feature of CCC - I haven't tried going any higher.

 

[TurtleCrusher]

I get a solid 720/960 before i get artifacts. When i overclock the core past that i get BSOD's, overclock the memory i get artifacts real bad. I keep it well below to preserve the card.

It's amazing what $100 got me in terms of performance..

 

[konakona]

755/975 here.
I start seeing some slight artifacting at around 990~995 for memory (the higher the clock, the more frequent from that point on)
core seems to do fine for fallout3 up to 780 or so, but crashes in grid racing at 760 or so.

oh, and all this is at 1.158v.

 

[Rifter]

I tested it with higher memory but found that higher core clock gave me better performance. I like how it underclocks when in windows just idle at desktop so you only have to crank up the fan speed when gaming, i could not stand the fan at 70-100 all the time either, i have it set to %30 when on the desktop or when booted into linux. I wonder if i can achive such high core clocks because of my motherboard, it has a 4pin molex connector right above the PCIe slot and the manual said it was to keep steady voltage to the video card, i thought it was marketing BS but maybe not.

 

[way2fast91]

I updated to CCC 9.4 last night, so I will play around with mine so more tonight. See if I can get 'er to dance a little more. I am thinking I can squeeze at least 700/925 stable in game, but now starting to think I should use rivatuner to push the gpu higher.

 

[MrK6]

Originally posted by: AstroManLuca BTW, FurMark is a better artifact tester. More demanding.

QFT

OP, ATI Tool's artifact tester is too old to properly stress newer cards, hence why your temps are so low. You need to load up FurMark or a demanding game like Crysis to accurately test the limits of your card.

 

[Rifter]

yeah these cores seem able to hit 800+ pretty easy, imagine what we could do with good aftermarket cooling

 

[Rifter]

MrK6

does furmark come in a 64bit version, all the ones i saw were 32bit, also i am using the crysis demo to test as well and the ati artifact tool gets the GPU hotter than crysis by about 2-3c.

 

[vj8usa]

Originally posted by: Rifterut
MrK6

does furmark come in a 64bit version, all the ones i saw were 32bit, also i am using the crysis demo to test as well and the ati artifact tool gets the GPU hotter than crysis by about 2-3c.

I'm not aware of a 64 bit version, but that doesn't really matter since the 32 bit version works fine with 64 bit Windows.

 

[MrK6]

Originally posted by: Rifterut
MrK6

does furmark come in a 64bit version, all the ones i saw were 32bit, also i am using the crysis demo to test as well and the ati artifact tool gets the GPU hotter than crysis by about 2-3c.

Furmark runs fine in 64-bit windows, hence there's only one version. Interesting that the Crysis demo doesn't load up the card that much. Try cranking the eye candy and playing the game itself.