You can find some character that consist of letter and number from cpu's metal surface.

 

go to cpuworld and inquire this character

 

You could got the cpu stepping and cpuid messages.

 

 

Here are list of xeon's cpu stepping and cpuid  that  i sort .

*=FSB1600
=65nm
=45nm

Xeon 5000 family

STEPPING

CPUID

Xeon 5020 C1 (SL96F) F64 (SL96F)
Xeon 5030 C1 (SL96E) F64 (SL96E)
Xeon 5040 C1 (QMOU, SL96D) F64 (SL96D)
Xeon 5050 B1 (QHZK)
C1 (QMOS, SL96C)
F64 (SL96C)
Xeon 5060 B0 (QFCI)
B1 (QHYY)
C1 (QKIC, QMOP, SL96A)
D0 (QJRY)
F64 (QKIC, SL96A)
Xeon 5063 B1 (QHZB)
C1 (QMPB, SL96B)
F64 (QMPB, SL96B)
Xeon 5070 B1 (QJYK)
C1 (SL969)
F64 (SL969)
Xeon 5080 C1 (QMOL, SL968) F64 (SL968)

 

Xeon 5100 family

STEPPING

CPUID

Xeon 5110 B0 (QLSN)
B1 (QOWW)
B2 (QTKE, SL9RZ, SLABR)
G0 (QXRN, SLAGE)
6F6 (SL9RZ, SLABR)
6FB (QXRN, SLAGE)
Xeon 5120 B0 (QLSJ)
B2 (QTIY, SL9RY, SLABQ)
G0 (QXRJ, SLAGD)
6F6 (SL9RY, SLABQ)
6FB (QXRJ, SLAGD)
Xeon 5130 B0 (QLUR)
B1 (QOXU)
B2 (QTIU, SL9RX, SLABP)
G0 (QXRF, SLAGC)
6F6 (SL9RX, SLABP)
6FB (QXRF, SLAGC)
Xeon 5140 A1 (QLYJ)
B1 (QOXQ)
B2 (QTIQ, SL9RW, SLABN)
G0 (QXRB, SLAGB)
6F6 (SL9RW, SLABN)
6FB (QXRB, SLAGB)
Xeon 5150 B0 (QLUJ)
B1 (QOXM)
B2 (QTIM, SL9RU, SLABM)
G0 (QXQX, SLAGA)
6F6 (SL9RU, SLABM)
6FB (QXQX, SLAGA)
Xeon 5160 B0 (QLUF)
B1 (QOXI)
B2 (QTII, SL9RT, SLABS)
G0 (QXQT, SLAG9)
6F6 (SL9RT, SLABS)
6FB (QXQT, SLAG9)
Xeon 5113    
Xeon 5128 B2 (SL9XA)
G0 (QXQH, SLAG6)
6F6 (SL9XA)
6FB (QXQH, SLAG6)
Xeon 5138 B2 (SL9RN)
G0 (QXPJ, SLAG3)
6F6 (SL9RN)
6FB (QXPJ, SLAG3)
Xeon 5148 B2 (SL9RR, SLABH)
G0 (QXPZ, SLAG4)
6F6 (SL9RR, SLABH)
6FB (QXPZ, SLAG4)

 

Xeon 5200 family

STEPPING

CPUID

 Xeon L5215 E0 (SLBB3) 1067A (SLBB3)
Xeon L5238 C0 (SLANM)
E0 (QFZX, SLBAZ)
10676 (SLANM)
1067A (QFZX, SLBAZ)
Xeon L5240 C0 (Q684, SLAS3)
E0 (QFZP, SLBAY)
10676 (SLAS3)
1067A (QFZP, SLBAY)
Xeon L5248 E0 (SLBAV) 1067A (SLBAV)
Xeon E5205 B1 (Q3KZ)
C0 (Q651, SLANG)
E0 (QFZB, SLBAU)
10676 (SLANG)
1067A (QFZB, SLBAU)
Xeon E5220 A1 (Q2LE)
C0 (SLANF)
E0 (QFYX, SLBAT)
10676 (SLANF)
1067A (QFYX, SLBAT)
Xeon E5240 C0 (SLAND)
E0 (QFYS, SLBAW)
10676 (SLAND)
1067A (QFYS, SLBAW)
Xeon X5260 C0 (Q624, SLANJ)
E0 (QFYN, SLBAS)
674 (Q4QY)
10676 (SLANJ)
1067A (QFYN, SLBAS)
Xeon X5270 E0 (QFYE, SLBAQ) 1067A (SLBAQ)
 Xeon X5272* C0 (SLANH)
E0 (QFYJ, SLBAR)
10676 (SLANH)
1067A (QFYJ, SLBAR)

 

Xeon 5300 family

STEPPING

CPUID

 Xeon L5310 B3 (QURR, SL9MT, SLACA)
G0 (QWVU, SLAEQ)
6F7 (SL9MT, SLACA)
6FB (QWVU, SLAEQ)
Xeon L5318 G0 (SLAJE)  
Xeon L5320 B3 (QYEI, SLA4Q, SLAC9)
G0 (QWVO, SLAEP)
6F7 (SLA4Q, SLAC9)
6FB (QWVO, SLAEP)
Xeon L5335 G0 (QWUG, SLAEN) 6FB (SLAEN)
Xeon E5310 B3 (QVHM, SL9XR, SLACB)
G0 (QWVK, SLAEM)
6F7 (SL9XR, SLACB)
6FB (QWVK, SLAEM)
Xeon E5320 B1 (QQOE)
B3 (QURM, SL9MV, SLAC8)
G0 (QWVE, SLAEL)
6F7 (SL9MV, SLAC8)
6FB (QWVE, SLAEL)
Xeon E5330 B1 (QQNZ)
B3 (QURH)
 
Xeon E5340 B0 (QQYH, QQYK)
B0? (QUQI)
B1 (QQNA)
6F4 (QQYK)
Xeon E5345 B3 (QVQP, SL9YL, SLAC5)
G0 (QWTW, SLAEJ)
6F7 (SL9YL, SLAC5)
6FB (QWTW, SLAEJ)
Xeon X5355 B3 (QVQF, SL9YM, SLAC4)
G0 (QWTM, SLAEG)
6F7 (SL9YM, SLAC4)
6FB (QWTM, SLAEG)
Xeon X5365 B3 (SLAC3)
G0 (QWTH, SLAED)
6FB (SLAED)

 

Xeon 5400 family

STEPPING

CPUID

Xeon L5408 C0 (SLAP5)
E0 (QFWH, SLBBT)
10676 (SLAP5)
1067A (QFWH, SLBBT)
Xeon L5410 C0 (Q3JH, Q9FU, SLAP4)
E0 (QFWD, SLBBS)
10676 (SLAP4)
1067A (QFWD, SLBBS)
Xeon L5420 C0 (Q9FR, SLARP)
E0 (QFVZ, SLBBR)
10676 (SLARP)
1067A (QFVZ, SLBBR)
Xeon L5430 E0 (QFVV, SLBBQ) 1067A (SLBBQ)
Xeon E5405 C0 (Q9EL, SLAP2)
E0 (QFUY, SLBBP)
10676 (SLAP2)
1067A (QFUY, SLBBP)
Xeon E5410 B1 (Q3HP)
C0 (Q5YJ, SLANW)
E0 (QFUU, SLBBC)
10676 (SLANW)
1067A (QFUU, SLBBC)
Xeon E5420 C0 (SLANV)
E0 (QFUP, SLBBL)
10676 (SLANV)
1067A (QFUP, SLBBL)
Xeon E5430 C0 (Q9CY, SLANU)
E0 (QFTS, SLBBK)
10676 (SLANU)
1067A (QFTS, SLBBK)
Xeon E5440 B1 (Q3HE)
C0 (Q9CU, SLANS)
E0 (QFTM, SLBBJ)
10676 (SLANS)
1067A (QFTM, SLBBJ)
Xeon E5450 C0 (Q5YQ, SLANQ)
E0 (QFUF, SLBBM)
10676 (SLANQ)
1067A (QFUF, SLBBM)
 Xeon X5450 C0 (QAMB, SLASB)
E0 (QFUB, SLBBE)
10676 (SLASB)
1067A (QFUB, SLBBE)
 Xeon X5460 C0 (Q5XQ, SLANP)
E0 (QFTX, SLBBA)
10676 (SLANP)
1067A (QFTX, SLBBA)
Xeon X5470 E0 (QFVH, SLBBF) 1067A (SLBBF)
 Xeon E5462* C0 (SLANT)
E0 (QFUK, SLBBN)
10676 (SLANT)
1067A (QFUK, SLBBN)
 Xeon E5472* C0 (SLANR)
E0 (QFTD, SLBBH)
10676 (SLANR)
1067A (QFTD, SLBBH)
Xeon X5472* C0 (SLASA) 10676 (SLASA)
Xeon X5482* C0 (Q9UF, SLANZ) 676 (Q9UF)
10676 (SLANZ)
Xeon X5492* E0 (SLBBD) 1067A (SLBBD)