170是伺服器用的!!比較穩定!!
4400+是給一般使用者用的。
我建議買170，因為雖然他預設比較低，但是170的超頻性比較佳!!大鵰周期非常多!!
而4400+，老實說，並不好超。體質普遍不好!!而且我也不建議買散裝，因為沒保固，哪一天突然壞了，就哭死了!!因為我連買盒裝新品都有買過新品不良的經驗，所以千萬不要以CPU不容易壞就買散裝，雖然機率低，還是有可能發生的!!而且散裝有可能是ES板(工程板)，AMD有些ES板外觀跟市售板很像，好像是從序號，週期來辨別!!

以下附上Opteron的超頻的周期資訊，希望對你有幫助!!

單核心部分:
Models:
144 (1.8 GHz)
146 (2.0 GHz)
148 (2.2 GHz)
150 (2.4 GHz)
152 (2.6 GHz)
154 (2.8 GHz)



[edit]Stepping Info:
CABNE 0539 and before were great overclockers ~3.0ghz+
CABNE 0540 and after havnt been that great but still not bad ~2.8ghz
CABYE 0539 and before not to bad ~2.8ghz
CABYE 0540 and after great oc'ers ~3.0ghz+
CABGE All weeks not the greatest 2.6-2.7 at high voltage
CAB2E All weeks are hitting about 3.0ghz+ except the 0546 FPDW, which has never been seen above 2.8ghz, even at 1.6v.
CACJE from 2006 have also been doing pretty well, 2.9ghz+ on relatively low voltage and air cooling.
CAB1E 0614 and anything else that happens to come out, 2.9+ stock/low voltage

雙核心部分:


Models:
165 (1.8 GHz)
170 (2.0 GHz)
175 (2.2 GHz)
180 (2.4 GHz)



[edit]Stepping Info
CCBWE are less likely to be coldbugged.
CCBBE and CCB1E are very likely to be coldbugged.
Averaging >=2800
CCB1E 0550VPMW
CCB1E 0605XPMW
CCB1E 0608MPMW
CCB1E 0609FPMW/FPAW
CCBBE 0610DPMW (most consistent for 3GHz +)
CCBBE 0615DPMW/EPMW
CCBBE 0617FPMW
CCBWE 0602BPMW
Averaging 2600-2800
CCB1E 0606FPMW
CCB1E 0609FPBW
CCBWE 0530TPMW
CCBWE 0546XPMW/MPMW
CCBWE 0550UPMW/VPMW
Averaging <=2600
CCBWE 0534SPMW
CCBWE 0541RPMW
CCBWE 0543TPMW
CCBWE 0551UMPW/VPMW
CCBWE 0604TPMW
CCBWE 0607UPBW
CCBWE 0609FPAW