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4890 Overclock

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Originally posted by: thilan29


EDIT: Do the 4890 cards show VRM temps? I didn't see it in Lopri's pic.
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Haven's seen those anyware. Maybe the VRMs are so hot that ATI doesn't want to show them to the public. :laugh:
 
Originally posted by: TC91


Mine didn't flicker for gpu clock changes, but memory clock changes, every single darn time. Yes I absolutely do believe they did not implement this because it will bother the owners. It definitely bugged the hell out of me. It also probably somewhat lowered the rate of RMAs.
Click to expand...

What are you referring when you say flicker? It's a slight shiver of the image and nothing more. Mine just does it for a quarter of a second . Most of the time it's not even noticeable, being so fast.
 
In 2d mode the HD 4890 runs at 1.053v. I've been told underclocking the ram at that voltage doesn't matter much. My reply was, when underclocking the ram from 975MHz to 490MHz in ATI CCC the PC would idle at 20W less. Thats a lot imo, from 180ish to 160ish Watt. I was then told they just follow ATI spec.

Also, can anyone run Furmark, with a voltage higher then stock (1,312V)? When I tried to do so, Furmark would ALWAYS crash.
 
Originally posted by: MarcVenice


Also, can anyone run Furmark, with a voltage higher then stock (1,312V)? When I tried to do so, Furmark would ALWAYS crash.
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Probably the power circuit starts overheating at more then 1.31 V. At exactly the same voltage ( 1.32v), my 4870 crashes in Furmark, even with the fan at 100%. Works at 1.31V but it doesn't at more then that.
 
Nah not overheating. It is said the volterra chip has a limit, run to many amps through it, and it will shut down the videocard, or stop working correctly. Furmark will crash instantly, so the power circuit doesn't even get the time to heat up. Games simply dont load the gpu like furmark does. In fact, the gpu itself is designed in such a fashion, that when keeping the clockspeeds equal but increasing the voltage, the performance will lower. It's only by a small margin, but it happens, so Asus told me. Here's the picture I got from Asus: http://tweakers.net/ext/i/1240329466.jpeg
 
Originally posted by: MarcVenice
Nah not overheating. It is said the volterra chip has a limit, run to many amps through it, and it will shut down the videocard, or stop working correctly. Furmark will crash instantly, so the power circuit doesn't even get the time to heat up.
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Well, good to know that. So basically there is no point in increasing the voltage on a 4890.

Originally posted by: MarcVenice

Games simply dont load the gpu like furmark does.
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The thing is that games, are starting to catch up with Furmark. If you have Burnout installed on your PC, you should run some temperature monitoring software in the background and you'll see that this little game, with SSAO enabled, manages to take the GPU almost as hot as Furmark takes it.
 
I think the temperature of 4890 is decent for what it is. Like Marc says it'd be better if Catalyst lowered memory frequency when in 2D, but overall I am satisfied with its thermal characteristics and acoustics. Don't make mistake it is LOUD under load, but GTX 280 is LOUDER.. Though seeing 3000RPM = 100% for 280 and 2600RPM = 40% for 4890, I wonder how loud 4890 could be..? 6500RPM? Haha..

Well that reminds me that I haven't tried manually adjusting fan speed! I guess I will give it a shot. Also, I still haven't got to play with voltages yet. Does anyone have a download link to ASUS tool?
 
I haven't seen anyone able to get the Asus tool to work on a non Asus bios... Some have even flashed to an Asus bios and still cant get it to work...
 
Why do you even care about the ASUS tool, when you have voltage factory that does everything you want, without too much hassle!?
 
Originally posted by: error8
Originally posted by: TC91


Mine didn't flicker for gpu clock changes, but memory clock changes, every single darn time. Yes I absolutely do believe they did not implement this because it will bother the owners. It definitely bugged the hell out of me. It also probably somewhat lowered the rate of RMAs.
Click to expand...

What are you referring when you say flicker? It's a slight shiver of the image and nothing more. Mine just does it for a quarter of a second . Most of the time it's not even noticeable, being so fast.
Click to expand...

For me it was a bit more than a slight shiver of the image, this youtube video shows how it looks like about 26 seconds in: http://www.youtube.com/watch?v=6lbsqMI0rIo

Mine did not flicker for that long but the screen shakes/flickers like that albeit for a very short moment of time. It is attrocious and completely unacceptable imo, even if it is just a slight shiver of the image.
 
Originally posted by: TC91


Mine did not flicker for that long but the screen shakes/flickers like that albeit for a very short moment of time. It is attrocious and completely unacceptable imo, even if it is just a slight shiver of the image.
Click to expand...

Yeah, if it lasts more then a half a second it's not sexy at all. So you've RMA it?
 
Originally posted by: error8
Yeah, if it lasts more then a half a second it's not sexy at all. So you've RMA it?
Click to expand...

It didn't really last for more than half a second but it just looked nasty. I've finally sold the thing and replaced it with a GTX 285 🙂.
 
Originally posted by: JBT
Just got mine.

Played LotRO for a few hours at 950 core 1050 memory. Everything seems fine.
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not quite having the same results anymore...
If I have either the core or the memory OC'ed and use the scroll wheel my secondary monitor will have a tiny line flash through it. Quite annoying...
 
I'm thinking the flickering on mine is due to the core actually lowing to ~120 mhz in 2d instead of 240 mhz when Overdrive is enabled.

Does anyone else with a Dual monitor set up have this issue in 2d mode?
 
Just using Tray tools and disabling the ATI over drive seems to have done the trick for me. Back to the 950/1025 for now.
 
I just set up my MSI 4890 and am disappointed with the results (especially compared to the reviews/comments I've been seeing). At stock, my card is idling @ 63C. I have an Antec P180 case with several fans, so I don't think cooling is the issue.

I run OCCTGPU 0.64 and FurMark @ stock (880/999) and the card reaches up to 85C with the fan pumping pretty high. I can't seem to get any increase in core without my computer crashing. Do you think I need to break it in a bit or did I just get stuck w/ a weak card? If it doesn't show any progress over the next day or so, I'm thinking I'll try to send it back for a replacement.
 
Originally posted by: coolade
I just set up my MSI 4890 and am disappointed with the results (especially compared to the reviews/comments I've been seeing). At stock, my card is idling @ 63C. I have an Antec P180 case with several fans, so I don't think cooling is the issue.

I run OCCTGPU 0.64 and FurMark @ stock (880/999) and the card reaches up to 85C with the fan pumping pretty high. I can't seem to get any increase in core without my computer crashing. Do you think I need to break it in a bit or did I just get stuck w/ a weak card? If it doesn't show any progress over the next day or so, I'm thinking I'll try to send it back for a replacement.
Click to expand...

Is it not fast enough at 880 ???
 
Hi,

I have my MSI 4890 / Ewizzer deal running @

1000 core
1100 memory

FURMARK Torture 12+ hours at max of 51c
Played COD4 for an hour
Played Titan Quest for an hour
Played UT3 for an hour

Card is watercooled with a new EK block purchased from FrozenCPU.
Card is voltmodded 1.375v via rivatuner and plugins.

This is some video card for $185 after all the rebate, instant and MSCB.

Good Luck on the OC!

Dave
 
Originally posted by: coolade
If it doesn't show any progress over the next day or so, I'm thinking I'll try to send it back for a replacement.
Click to expand...

Yeah, change the card because it doesn't overclock better.:laugh: I don't think that is possible.

You could try other things, to possibly improve your cooling, like changing the thermal paste and modify the fan profiles to spin faster and eventually, if the cooler can take it, to increase the gpu voltage.
 
Originally posted by: coolade

I just set up my MSI 4890 and am disappointed with the results (especially compared to the reviews/comments I've been seeing). At stock, my card is idling @ 63C. I have an Antec P180 case with several fans, so I don't think cooling is the issue.

I run OCCTGPU 0.64 and FurMark @ stock (880/999) and the card reaches up to 85C with the fan pumping pretty high. I can't seem to get any increase in core without my computer crashing. Do you think I need to break it in a bit or did I just get stuck w/ a weak card? If it doesn't show any progress over the next day or so, I'm thinking I'll try to send it back for a replacement.
Click to expand...
I imagine the case temp (inside the case, to be exact) is probably high. For a testing purpose, maybe you can try adjusting fan speed manually? My case has lots of holes compared to Antec P180, and P180 is rather known for its quietness than cooling performance. 85C while running OCCTGPU sounds perfectly fine to me, though, as long as it doesn't crash or gives artifacts.

Welcome to AnandTech Forums, BTW.

Originally posted by: CrystalBay

Is it not fast enough at 880 ???
Click to expand...
Hey, give him a break. We've all been there and done that.
 
Originally posted by: CrystalBay

Is it not fast enough at 880 ???
Click to expand...

haha i'm sure it'll be fine, but I guess i'm just getting greedy from reading about everyone else hitting 950+ staying below 80C.

Originally posted by: error8

You could try other things, to possibly improve your cooling, like changing the thermal paste and modify the fan profiles to spin faster and eventually, if the cooler can take it, to increase the gpu voltage.
Click to expand...

Thanks - I'll definitely give that a shot eventually.

Originally posted by: lopri

I imagine the case temp (inside the case, to be exact) is probably high. For a testing purpose, maybe you can try adjusting fan speed manually? My case has lots of holes compared to Antec P180, and P180 is rather known for its quietness than cooling performance. 85C while running OCCTGPU sounds perfectly fine to me, though, as long as it doesn't crash or gives artifacts.

Welcome to AnandTech Forums, BTW.
Click to expand...

Thanks! You're prob right about my case temp. I guess there's nothing to worry about as long as it doesn't > 90C. I run games at 1900 x 1200 so no big deal +/-50mhz anyway...

 
Originally posted by: coolade
I just set up my MSI 4890 and am disappointed with the results (especially compared to the reviews/comments I've been seeing). At stock, my card is idling @ 63C. I have an Antec P180 case with several fans, so I don't think cooling is the issue.

I run OCCTGPU 0.64 and FurMark @ stock (880/999) and the card reaches up to 85C with the fan pumping pretty high. I can't seem to get any increase in core without my computer crashing. Do you think I need to break it in a bit or did I just get stuck w/ a weak card? If it doesn't show any progress over the next day or so, I'm thinking I'll try to send it back for a replacement.
Click to expand...

Absolutely fine load temps with something like OCCT or Furmark. In games you probably won't see much over 70-75C with the fan running ~35% (which is still pretty quiet at that point).

I have a P180 as well, with no sort of sensible cable management. My temps are listed way up top. That's with about a 75F ambient temp, case is closed.
 
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