3870 @ 1200MHz Core w just Dry Ice

[LardArse]

Finally got some 3870 to play with
So far testing with Dry Ice, too lazy to cut the blocks down smaller, the temperature is just around -39C once it gets to benching.




-39C is actually enough for 1200MHz Core!! With just a low 4.25GHz CPU, 16.4K 3D Mark 06!!



With 1.75v @ 1200MHz
However, the card doesn't even break 1100MHz core until the Over Current Protection is removed! Here's how

How much does this equate to a 2900XT? 1100MHz core?

[sponge bob]

Over Current Protection link missing.

[motox]

Wow, very impressive!!

[G H Z]

Those are sickening clocks, really makes one wonder what might happen with more cooling. Once again you have demonstrated your superior voltmodding ability

Thanks Sham

[Oliver]

Really good and those vmods is impressive.

Keep pushing it.

[saaya]

very well done sham!
cant wait to get my 3870s... but the prices here still suck, there is almost no supply to europe in seems

omg just saw the card... damn is it really necessary to move all those caps around or did you have to do that to find and kill the ovp?

[ZoLKoRn]

1.2GHz! core on 1.75V, very impressive with clock speed and vmods

congratz

[Fr3ak]

Nice clocks Peter! The card looke like a typical "modded by Shamino" piece of hardware

[saaya]

oi! 175v? didnt see that... thats quite high isnt it?
how were the temps?

[Rovtar]

omg nice clock

[Solarfall]

i knew that 1200mhz (for core) would be totally possible with ati3870 cards.. very impressive mate

[crotale]

Crazy mods Peter!

And I thought 1.65vgpu was alot for 2900

[LardArse]

Much bigger inductors....



These cores are really the rejects, they require lots of volts to run the same mhz as 2900. Good thing these cards are easier to tame than 2900, the main heat is from core clocks, raising voltage by +0.1v creates only the same amount of heat as raising ~20MHz of the core.

[ZoLKoRn]

i knew that 1200mhz (for core) would be totally possible with ati3570 cards.. very impressive mate

wow ATI brand new or new Nokia model ? calm mate... calm

btw. i mean to joke not mean to other

[Oliver]

Impressive with the new inductors and good info .

Keep pushing it.

[quake6]

@LardArse:Could you make thread what did you actually do on your card? For that HARD vmoding

[SF3D]

Impressive core clocks Peter. 1200MHz @ -39c. Those mods are quite sick too

Now I would like to see how is HD2900XT doing ~1000-1100MHz with same CPU speed. The I can decide

This is closest I can found: http://www.hwbot.org/result.do?resultId=627923

[EmineM]

very nice results and nice modding !
How high can you set vgpu till overvolt protect kicks in?

[Solarfall]

wow ATI brand new or new Nokia model ? calm mate... calm

btw. i mean to joke not mean to other

hahah what a funny typo on my part.. damn where did i put my glasses

[Benny Lodewijk]

nice score there sham !! Congrats

[Harshal]

Sham... totally killing it!!
Tho nothing less is expected from you
and yeah... Wicked MODS!!!

[Nosfer@tu]

Amazing work.
Must get 3870, MUST GET. MUST GET.......

[THC]

Wicked ... bet u guys can squeeze some more mhz out of it

[LowRun]

This is freakin' sick dude

Damn impressive mods there

[Miwo]

very nice! What vgpu does overcurrent protection kick in, 1.6v? Also what brand/size caps did you use to replace? Can't load the pics here :\