HD4870x2 roughly equal to HD5870 leh.  

I got the same experience as you
Initially it was okay, later core 0 always error when prime no matter what I did (increase Vcore, NB Voltage and etc etc)

I would suggest you can think of solution B which is don't bother with it which I did. As long as it don't crash on you

Even never stress also can BSOD? Yours have some problem indeed

Weird....priming mine at quad core stock speeds, RAM set at 1066 5-5-5-15 will fail even with Vdimm 2.1v-2.2v (My OCZs are rated at 1066 5-5-5-15)
But set at 800 no fail ~_~

When OCed only, Core 0 always fail, no matter what test

Core 0 will still fail when OC till 3Ghz-3.3Ghz, tested by myself

same like mine..OCZ rated 7-7-7-20@1.8,always fail..now on 8-8-8-24@1.7,prime stable 3 hours at B55@3.4Ghz..

conclusion 1333 not stable,1066 stable..

that is the normal timing that able to monitor with cpuz.. so rarely we not notice..
the subtimings..sometimes will be the mess..if leave auto.

and iinm. auto not depends on the ram freq.. it depends on the divider..
eg: 800mhz divider timing is 3
1066mhz divider timing is 4  (both is auto..not manually set)

if use the 800mhz divider..but OC thru HTT up to 1066mhz ram speed..the timing will still be 3.not 4.

any sifu..pls correct me if im wrong then..since i seldom use auto..so might giving wrong info..

was OCing my fren PC( he is using 955 BE c2), higest i can OC for him was 3.8GHz, weird his Mobo bios dun have option for CPU-NB adjustment. the bios was american megatrend, his Mobo was asus 785tdm evo, if i tried 3.9, bluescreen, wan to cahnge to a higer cpu-nb freq osos cannot, bios limited, shud i use AOD? prefer bios OCing, n also just OCing using multiplier so far

how bout the cpu-nb freq?

some mobo wont work like that..
if set auto.. it will make the value near to 2000mhz..
for ex.
200htt x 10nb multi = 2000mhz
210htt x 10nb multi = 2100mhz

but
220htt x10nb multi = 2200mhz..
220htt x 9nb multi = 1980mhz..
1980mhz is near to 2000mhz..so the auto will make it 9..not 10..

but in this case, he cant even set...means no option..

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Added on August 13, 2010, 2:33 pm
sad i dont have chance even once to play with high class mobo.. all cheap and fragile one..   

dun really care bout the voltage, tat one can set, but prob wif the freq of the cpu-nb only, haih....

he already said.. no CPU NB option.. how to set?   

btw..ad lame update..for fun since still short of money to get new mobo..
even this a cheap ass mobo that lack with everything..and only use 1x4pin that supplying CPU the power..still can do better then my prev 770ud3p..
[attachmentid=1724996]
ud3p 1.3v for 3.2ghz..

he already said.. no CPU NB option.. how to set?   

btw..ad lame update..for fun since still short of money to get new mobo..
even this a cheap ass mobo that lack with everything..and only use 1x4pin that supplying CPU the power..still can do better then my prev 770ud3p..
[attachmentid=1724996]
ud3p 1.3v for 3.2ghz..

Dude..you always double post aarr?

AMD's Phenom II X6 1075T BE listed and priced

This 45nm Thuban based six-core Phenom II works at 3.0GHz, has unlocked BClk multiplier, has 512kb of L2 cache and 6MB of L3 cache. It has a rated TDP of 125W and we are talking about AM3 CPU that is, of course, backward compatible with AM2+ socket so you have support for both DDR3-1333 and DDR2-1066 memory.

yup kinta ryte on tat, for now hav to wait for my fren to come bck b4 continue OCing his proc, did ask him to update bios, will see how later, btw all ahsos board has tat special software, turboV or sumtin, i now we can change volt n stuff using tat, but can i play wif clocks(HTT, cpu-nb n stuff) using the software, u noe, like Easy Tuner(ET) for gaygayboard?

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Added on August 15, 2010, 7:25 am
izzit stable mate?

Dengzzzz... ok. I would run Prime when WC kit is installed.
I was running prime for a while just now.
Temp went up to 59c. I got to stop it as AMD recommend temp below 62c for the chip.
I don't want to BBQ my chip now.

Btw, Alankc is running 1055T AT 4.15Ghz. 4.1Ghz should be okay for 1090T.