Have a few questions on 3870 cards.

trt740 · Apr 7, 2008

Been a long time since I owned one. Whats a average overclocked 24/7 setting with the stock cooler. Also is atitool not compatible with overdrive, because as soon as I load ati tools it freezes. I have the newest version.

sneekypeet · Apr 7, 2008

RM made a second clocked bios IIRC it was 800/1200. Really depends on the cards tho trt, I have seen a few clunkers over in the 3K threads.

Plus with a little bit of pencil,I got mine to 918 stable in all games, 65*C max 70% fan, and 1.51V to the core!

Hope that helps!

Also you can use RivaTuner to tweak and furbench to check for artifacts.

erocker · Apr 7, 2008

The latest RivaTuner works great with my 3870's. I have mine flashed to 837/1190. I'm using the HIS IceQ cooler though.

trt740 · Apr 8, 2008

mine comes clocked at 800/1126 and its a ddr4 card. So I bet it doesn't have much head room. Whats up with ati tools? It won't load at all? I reinstalled it.

trt740 · Apr 8, 2008

anyone know is there a soft voltage mod for these cards

erocker · Apr 8, 2008

Nothing that I know of yet, but I think W1zzard may be working on something

http://forums.techpowerup.com/showthread.php?t=53220

trt740 · Apr 8, 2008

I think I got another bad card here it randomly crashes and kicks me from windows after a freezes and pixelation. Thats three bad cards in a row. One bad 8800 gt 1 gb from palit , one 8800gt from msi with a bad fan and now this 3870 MSI card randomly crashing. It might be my pcie bus overclocked. I hope it is this is a cool card and this is getting old fast.

Dr. Spankenstein · Apr 8, 2008

You might benefit from checking out the latest Beta of ATITrayTools. It has voltage adjustments up to 1.60.

You'll never want CCC on your comp again!

You're gonna have to spin up those fans whether you like it or not. Crashes will continue until you do so.

DanishDevil · Apr 8, 2008

Does the voltage adjustment actually work!?!?!?

trt740 said:
I think I got another bad card here it randomly crashes and kicks me from windows after a freezes and pixelation. Thats three bad cards in a row. One bad 8800 gt 1 gb from palit , one 8800gt from msi with a bad fan and now this 3870 MSI card randomly crashing. It might be my pcie bus overclocked. I hope it is this is a cool card and this is getting old fast.

Lock all your bus frequencies man!!!

Dr. Spankenstein · Apr 8, 2008

You know, I tried it. Then I realized that I had the jumper on my hard mod. So I'm not sure.
Pretty exciting, to say the least.

magibeg · Apr 8, 2008

Mines kicking around 850 just using overdrive to OC. No mods or added cooling needed.

Megasty · Apr 8, 2008

I've been messing around with the tri-fire for 2 months now. I just OC'd them, the X2 & 3870, by the max settings in overdrive. I do have another Diamond 3870 that I pretty much pushed to the limits, however it does have a huge all copper heatsink. I pushed it to 854/1372 on the stock cooler @ regular fan speeds. When I up'd the fan to 100% it was able to reach stable gaming clocks of 863/1393.

After finally going ahead & pencil modding it to 1.5v, I up'd the thing to the max 920/1422. I also had to take the red case off & tie a 120mm Scythe UK on the heatsink & the core never went above 48C. Lemme see watercooling do that :rockout:

It was rock solid even in Crysis, high, 1920x1200 & it took the whole game with an avg 34 fps. I'll use that game as a torture test for any card.

[I.R.A]_FBi · Apr 8, 2008

rma it.

trt740 · Apr 8, 2008

this card has the worst ram i have ever seen

trog100 · Apr 8, 2008

trt740 said:
this card has the worst ram i have ever seen

the last one i played with seems odd.. it will run a furbench with the memory at 1300.. a 2006 run at 1250..

but loading a submarine game.. cant remember the name it kept crashing at 1250.. it crashed exactly the same at 1200.. it crashed at 1150.. at the exact stock speed of 1126 it works perfectly.. any attempts at 1150 produces the game crash.. its 100% repeatable and definitely the card memory speed..

hard to figure.. these card can be weird.. i run both mine now at 840/1250.. but they vary one hell of lot.. i would say take no notice of claimed clocks.. play a dozen games then make your own mind up..

trog

trog100 · Apr 8, 2008

trt740 said:
this card has the worst ram i have ever seen

the last one i played with seems odd.. it will run a furbench with the memory at 1300.. a 2006 run at 1250..

but loading a submarine game.. cant remember the name it kept crashing at 1250.. it crashed exactly the same at 1200.. it crashed at 1150.. at the exact stock speed of 1126 it works perfectly.. any attempts at 1150 produces the game crash.. its 100% repeatable and definitely the card memory speed..

hard to figure.. these card can be weird.. i run both mine now at 840/1250.. but they vary one hell of lot.. i would say take no notice of claimed clocks.. play a dozen games then make your own mind up..

trog

ps.. if your pci bus is overclocked all bets are off.. he he

Darknova · Apr 8, 2008

My RAM runs at 1250, won't go any higher...clock is sat at 830, I just haven't pushed any higher on it.

I used ATITool to begin with, then once I found it was all stable, I used RBE to edit the BIOS and flashed that

asb2106 · Apr 8, 2008

Dr. Spankenstein said:
You might benefit from checking out the latest Beta of ATITrayTools. It has voltage adjustments up to 1.60.

You'll never want CCC on your comp again!

You're gonna have to spin up those fans whether you like it or not. Crashes will continue until you do so.

hey Dr, does the software voltage mod actually work? Ive heard all software volt mods dont really do anything, basically just locking it in at 1.33 and not letting it drop in 2d mode

asb2106 · Apr 8, 2008

my stable clocks now,

both cards - 872core/1302mem

I can bench the cards at 891 core but games will randomly lock up. Sometimes it never happens, and other times it locks up every 20 minutes. Im pretty sure its not temp related, my cards have never seen 50c(WC). Im actually wondering if it might be the voltage switch the cards make when it drops to 2d mode. hmmmmm

trt740 · Apr 8, 2008

whats the best brand 3870 anyone know? Im done with MSI no quality control at all.

PaulieG · Apr 8, 2008

sneekypeet said:
RM made a second clocked bios IIRC it was 800/1200. Really depends on the cards tho trt, I have seen a few clunkers over in the 3K threads.

Plus with a little bit of pencil,I got mine to 918 stable in all games, 65*C max 70% fan, and 1.51V to the core!

Hope that helps!

Also you can use RivaTuner to tweak and furbench to check for artifacts.

Can you give a link to some pictures for the pencil mod for the 3870. I've got one coming tomorrow.

levi__ · Apr 9, 2008

My Sapphire HD3870 doesnt overclock at all..
But im getting a new cooler tomorrow or the day after and hopefully it will run faster than stock. ;-)
It runs at about 95 degrees celcius full load with the stock cooler.. :-(

DanishDevil · Apr 9, 2008

Use rivatuner to set a higher fan speed.

Darknova · Apr 9, 2008

trt740 said:
whats the best brand 3870 anyone know? Im done with MSI no quality control at all.

Powercolor

DanishDevil · Apr 9, 2008

I've heard good things about the Diamonds.

The HIS cards are awesome.

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Have a few questions on 3870 cards.

trt740

sneekypeet

Retired Super Moderator

erocker

*

trt740

trt740

erocker

*

trt740

Dr. Spankenstein

DanishDevil

Dr. Spankenstein

magibeg

Megasty

New Member

[I.R.A]_FBi

trt740

trog100

trog100

Darknova

asb2106

asb2106

trt740

PaulieG

levi__

New Member

DanishDevil

Darknova

DanishDevil

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