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** The Official ATI 3870/3850 512/256mb Review/Overclocking Thread **
- Thread starter clocka
- Start date
ta haven't tried ati tool with these cards yet.
just saw this on XS ...voltage through ati tool for 3xxx series soon
http://www.xtremesystems.org/forums/showthread.php?p=2612991
think i might order some mcw60's for these bad boysand run a 2nd loop.
That is indeed what we are waiting on
After xmas I'm gonna pick up a SECOND card and then slap to DuOrbs on them! Hopefully after a bit of voltmodding these cards will hit some really healthy core speeds. I see someone over in the xtreme forums hit a core of 958Mhz with his VMod 
Easy if crossfire is supported well it will indeed be a decent bit faster however im pretty sure AA will probably still kill the cards in game! But maybe request some benchies from the crossfire guys like paradigm!
That is indeed what we are waiting on
Easy if crossfire is supported well it will indeed be a decent bit faster however im pretty sure AA will probably still kill the cards in game! But maybe request some benchies from the crossfire guys like paradigm!
the scaling in crossfire is very good from what i've done so far, from 59 to 107fps in F.E.A.R. for eg.
quake wars is another that's hitting almost 90% for me
need to test some more today but already these cards are tremendous value for £280.
someone on rage3d was getting 100% in crysis apparently.
can only imagine unleashing these with the cores @ 950+
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What is worth noting about crossfire, is if you only have 1280 res, then it is totally pointless. You need to run at least 1680 to get the gain, as 1280 is too CPU limited. (which is why I started eyeing up the ocuk 24" monitor recently - birthday in February ).
From the tests I've seen with crossfire, it isn't that much better in general than a gtx though, sometimes much slower. What are peoples thoughts on that?
Matthew
).From the tests I've seen with crossfire, it isn't that much better in general than a gtx though, sometimes much slower. What are peoples thoughts on that?
Matthew
Just flashed my Powercolor 512mb to a HIS iceQ3 BIOS and got another 10mhz on my core clock.
Really looking forward to some software voltage adjustments for this card!
I have also been hearing that the tighter GDDR3 memory timings make the 3850 memory performance pretty much the same as the GDDR4 3870...
Really looking forward to some software voltage adjustments for this card!
I have also been hearing that the tighter GDDR3 memory timings make the 3850 memory performance pretty much the same as the GDDR4 3870...
Soldato
- Joined
- 28 May 2007
- Posts
- 10,222
Nice mate those are some nice fps and bang for buck probably the best.
Will do in a bit.
I just did my first successful pencil vmod.
Stock resistance on the one resistor was 2.66....brought it down to 2.41 but my PCB is a bit different than from the reference pic I was using for the vgpu mod and don't know where to measure the vgpu. Hopefully I'm not roasting it?
Anyway so far it's stable @ 891/1080 ....temps don't go over 40c
I also have a question....I am using CCC to overclock and atitool to scan for artifacts. Ever since I unlocked overdrive I haven't been able to set my clocks with ATiTool....they just revert back to whatever I have set in CCC....and my CCC slider only goes to 900mhz.
1) Is there any way to extend the slider range in CCC?
2) How can I use ATITool to set my clocks again?
3) Look at my ATITool pic, the 2nd temp says 98c.....I'm pretty sure that's a bogus reading as most of the time it says 0c and as soon as the card is under load it goes to either 98c. Should I be worried? I assume it's just some messed up reading from lack of 38xx support?
quick update
Managed to get my 3850 to 1012/2196 core/mem.....did a 3dmark run and got 13,500 with my quad @ 3.3ghz.
I'll do another run tomorrow with my quad @ 3.8ghz and see what kind of score I get
This has definitely got to be the best bang/buck card out there....cost me 115 quid
Managed to get my 3850 to 1012/2196 core/mem.....did a 3dmark run and got 13,500 with my quad @ 3.3ghz.
I'll do another run tomorrow with my quad @ 3.8ghz and see what kind of score I get
This has definitely got to be the best bang/buck card out there....cost me 115 quid
Will do in a bit.
I just did my first successful pencil vmod.
Stock resistance on the one resistor was 2.66....brought it down to 2.41 but my PCB is a bit different than from the reference pic I was using for the vgpu mod and don't know where to measure the vgpu. Hopefully I'm not roasting it?
Anyway so far it's stable @ 891/1080 ....temps don't go over 40c
I also have a question....I am using CCC to overclock and atitool to scan for artifacts. Ever since I unlocked overdrive I haven't been able to set my clocks with ATiTool....they just revert back to whatever I have set in CCC....and my CCC slider only goes to 900mhz.
1) Is there any way to extend the slider range in CCC?
2) How can I use ATITool to set my clocks again?
3) Look at my ATITool pic, the 2nd temp says 98c.....I'm pretty sure that's a bogus reading as most of the time it says 0c and as soon as the card is under load it goes to either 98c. Should I be worried? I assume it's just some messed up reading from lack of 38xx support?
Yes Careful, ATI tool will not control crossfire fans...that other card is cooking !!!
I only have a single 3850....it's not crossfire...and the single card is under water. Doesn't break 47c @ 1.012ghz after 15min rthdribl
Wow that's some amazing clocks there, Im currently running Mine at 860 Core and 1330 Memory, I tried the core on 900Mhz but the screen just goes blank the memory starts artifacting anything over 1335 aswell can i apply thermal paste on the memory and take off them palstic type pads?
Wow, that's amazing! I thought the differences in power regulation components between the 3850 and 3870 would stop clocks getting that high...
I get this with my 3870 too. I think it is just a bogus reading of some kind; do the 38x0 cards even have a distinct temp sensor chip?
As regards my card, I received a Sapphire 3870 yesterday. Did not flash the BIOS and set clocks in CCC. Settled on 860/1300 for a quick run of 3dmark06 and the result is 9825. This puts me second in the Result Analyser comparison thing. To keep temps down I set the fan to run at 70% in Rivatuner, which kept everything under 50 degrees.
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Soldato
- Joined
- 15 Oct 2003
- Posts
- 16,247
- Location
- Chengdu
That's an amazing core speed! Could you run some more benchmarks at those speeds to give an idea what it's doing for games?