冇眼睇GA-M790GP-DS4H 1066問題

我本來用Kingston DDRII 800
但近曰我買咗4條 KHX8500D2T1K2即KINGSTON 2G HYPER X 1066 2GX4 [TOTAL 8G]
玩咗好多曰~都係冇可能行1066 5-5-5-15 PASS MENTEST86+ V2.11 OR OCCT
我試過SET 1.8/2.0/2.1/2.2/2.3V 都會出錯,而且L4D多人會LAG[我用4850 CROSSFIRE ]
但行VISTA,3DMARK又冇事.
最後我以為過熱~加咗個ANTEC RAM COOLING FAN都唔得...........真係冇眼睇......

最終我行800 4-4-4-15 2.0V,L4D/MENTEST86+/OCCT又正常番......
我想問我可以點做.........

我部機,PII 940BE+KINGSTON HYPER X 1066 8G+GA-M790GP-DS4H [790GX+SB750]
ASUS 4850 512MB X2+1.5TB SATAII 32MB X3 +ANTEC TUREPOWER TIRO 650
LG BD-ROM+LG DVD-RW

THX