Help overclocking 4870 x2

dmxdex2020 · 24 Aug 2009 at 11:25

I am trying to get my 4870 x2 at 800 core and 100 mem. call of duty WaW runs for alittle while then just locks up and crashes. I have set it back to stock and its now fine. I have even tried voltage tweaking to get it stable but still crashes. I am not sure what voltage is best for 800 core. Do you oc both gpus to the same clocks?

toxicredcat · 24 Aug 2009 at 11:54

Yes you want to have both GPU's running at the same speed to reduce the possibility of micro-stutter.
What are you using to tweak the voltages? Some cards can't hit 800/1000 like mine for example. Most I can get out of mine is 775/940

dmxdex2020 · 24 Aug 2009 at 11:58

Well i have pushed my mem to 1050 and left core at 750 which seemed stable in games but furmark crashes with my 4870 x2 and i have read its overloads the vrms for the 4870x2 so i need to find a decent gpu stablity test any idea's? The program i am using is by agent god. My card is the asus tri-fan just wish i could get it stable.

PaulyD · 24 Aug 2009 at 14:56

Why not use Rivatuner to log the temps and see at what point it crashes?

I always had trouble running my memory too high on my 4870x2, but core would do 825 on stock volts. However the soft-volt mod i did using Rivatuner would only change the core voltage and not memory voltage

kitfit1 · 24 Aug 2009 at 20:03

Most 4870x2's will do no more than 835 on the cores, and 945 on the mem. With mine, it needs the fan speed turned up to 100% to do those clocks.

For anything much higher, me thinks you are going to need W/C and probably a volt mod as well.

fornowagain · 24 Aug 2009 at 21:23

You might want to try the Top bios 790/915, extends the overdrive and loosens off the timings a bit.

Been running mine OCed 825/960 since they came out. Happily does 862 core (stock volts). Mem 1000, never pushed it higher doesn't help the scores much. Did this on air, but I use WC now which works a treat. The soft mod is kinda limited, nothing you do will raise the core over 1.37v (ref design),

dmxdex2020 · 24 Aug 2009 at 22:24

If i get the top bios will i be able to push it up to 800 core?

oggiet · 24 Aug 2009 at 22:36

From my personal experience its all about cooling.Since i have had watercooling i get my card on 787 clock and 990 memory

dmxdex2020 · 24 Aug 2009 at 22:49

My card is the asus tri fan edition so my air cooling is good. i set fan speed to 70% which should be good.

Furmark does not work with my card as its faulty so i dont know what other gpu stablity tester to try out.

oggiet · 24 Aug 2009 at 22:57

I normally use 3DMark Vantage to test my gpu

dmxdex2020 · 24 Aug 2009 at 22:58

My trial has ran out and i cannot be arsed to keep downloading it all the time.

oggiet · 24 Aug 2009 at 23:04

Sorry mate if could pm you on here i could help

dmxdex2020 · 24 Aug 2009 at 23:16

Its ok in here mate. i ran furmark and my 4870x2 score at stock on 1600x1200 was 5225 is that good or bad?

FPS: min=72 max=137 avg=88

I will need to learn how to flash my graphics card in the next few days.