Intel Coppermine S-Specs

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We get a lot of emails asking which chip is best to buy for overclocking. In general, 100 MHz CPUs are easier to overclock than 133 MHz parts, as the lower bus speed allows you to use 133 MHz; if you start at 133 MHz, you will wind up at 150-160 MHz if your RAM can support these speeds. In addition, from a price/performance standpoint, 500 – 600 MHz parts right now are a better bet.

This is a listing of the Coppermines that are out there and will shortly be out there. The Coppermines out there now are cA2 stepping. The new ones are cB0 stepping. If you want a shot at 900Mhz or better, don’t get the cA2 stepping, you probably won’t make it. Get the cB0 stepping. If 800Mhz is good enough, then the current stepping should be OK.

I realize not all of the processors out there are listed. I have one of them at the moment. I sent a note to Intel, and they said they’d try
to update faster, but this was the most complete list they had.

S-specs for Coppermines with the cA2 stepping:

100Mhz Processors

FC-PGA Processors      
S Spec Speed Retail/OEM Dual CPU
SL3Q9 500E OEM ??*
SL3R2 500E Retail ??*
SL3QA 550E OEM ??*
SL3R3 550E Retail ??*
SL3VH 600E OEM Yes
SL3NL 600E Retail Yes
SL3VJ 650 OEM Yes
SL3NM 650 Retail Yes
SL3VL 700 OEM Yes
SL3T3 700 Retail Yes
SL3VN 750 OEM Yes
SL3VC 750 Retail Yes
SL3X4 800E OEM Yes
SL3VD 800E Retail Yes
SECC2 Processors      
SL3V5 550 Retail Yes
SL3H6 600 OEM Yes
SL3NA 600 Retail Yes
SL3KV 650 OEM Yes
SL3NR 650 Retail Yes
SL3S9 700 OEM Yes
SL3SY 700 Retail Yes
SL3WC 750 OEM Yes
SL3V6 750 Retail Yes
SL3Z6 800E OEM Yes
SL3V7 800E Retail Yes

* If the answer is “No.” Intel states “These processors have not been validated in Dual Processor (DP) applications”. This doesn’t mean that they won’t work, but that you may have to finagle with them to do so. Oddly, though, the language is there for the newest FCPGAs, but no longer for the older ones, for which Intel first stated this.

133Mhz Processors

If you want to overclock your Coppermine, DO NOT BUY THESE.

FC-PGA Processors      
S Spec Speed Retail/OEM Dual CPU
SL3VF 533EB OEM Yes
SL3VA 533EB Retail Yes
SL3VG 600EB OEM Yes
SL3VB 600EB Retail Yes
SL3VK 667 OEM Yes
SL3T2 667 Retail Yes
SL3VM 733 OEM Yes
SL3T4 733 Retail Yes
SL3WB 800EB OEM Yes
SL3VE 800EB Retail Yes
SECC2 Processors      
SL3N6 533EB OEM Yes
SL3SX 533EB Retail Yes
SL3H7 600EB OEM Yes
SL3NB 600EB Retail Yes
SL3KW 667 OEM Yes
SL3ND 667 Retail Yes
SL3SB 733 OEM Yes
SL3SZ 733 Retail Yes
SL3WA 800EB OEM Yes
SL3V8 800EB Retail Yes

The real purpose behind this is to tell you what to look for, which is the cB0 stepping. Here are the s-specs for these:


S-specs for Coppermines with the new cB0 stepping:

100Mhz Processors

FC-PGA Processors      
S Spec Speed Retail/OEM Dual CPU
SL444 500E OEM No*
SL446 500E OEM No*
SL45R 500E Retail No*
SL44G 550E Retail No*
SL45T 550E Retail No*
SL3XU 600E OEM Yes
SL45U 600E Retail Yes
SL3XV 650 OEM Yes
SL45W 650 Retail Yes
SL3XX 700 OEM Yes
SL45Y 700 Retail Yes
SL3XZ 750 OEM Yes
SL462 750 Retail Yes
SL3Y3 800E OEM Yes
SL463 800E Retail Yes
SL43H 850E OEM Yes
SL49G 850E Retail Yes
SECC2 Processors      
SL3XH 550E OEM Yes
SL44X 550E Retail Yes
SL43E 600E OEM Yes
SL44Y 600E Retail Yes
SL3XK 650 OEM Yes
SL452 650 Retail Yes
SL3XM 700 OEM Yes
SL454 700 Retail Yes
SL3XP 750 OEM Yes
SL456 750 Retail Yes
SL3XR 800E OEM Yes
SL457 800E Retail Yes
SL43F 850E OEM Yes
SL47M 850E Retail Yes

* Intel states “These processors have not been validated in Dual Processor (DP) applications”. This doesn’t mean that they won’t work, but that you may have to finagle with them to do so.

133Mhz Processors

If you want to overclock your Coppermine, DO NOT BUY THESE.

FC-PGA Processors      
S Spec Speed Retail/OEM Dual CPU
SL3XS 533EB OEM Yes
SL45S 533EB Retail Yes
SL3XT 600EB OEM Yes
SL45B 600EB Retail Yes
SL3XL 667 OEM Yes
SL453 667 Retail Yes
SL3XY 733 OEM Yes
SL45Z 733 Retail Yes
SL3Y2 800EB OEM Yes
SL464 800EB Retail Yes
SL43J 866 OEM Yes
SL49H 866 Retail Yes
SECC2 Processors      
SL3XG 533EB OEM Yes
SL44W 533EB Retail Yes
SL3XJ 600EB OEM Yes
SL44Z 600EB Retail Yes
SL3XL 667 OEM Yes
SL453 667 Retail Yes
SL3XN 733 OEM Yes
SL455 733 Retail Yes
SL3XQ 800EB OEM Yes
SL458 800EB Retail Yes
SL43G 866 OEM Yes
SL47N 866 Retail Yes
SL48s 1,000 OEM No**

**Unlike the low-speed Coppermines described above, Intel flat out states “These processors cannot be used in Dual Processor (DP) applications”.

Intel’s labeling can be very confusing:

  • If there is more than one processor type at a certain speed, then Intel uses the “E” and “EB” labels.
  • An “E” means it’s a Coppermine running at 100Mhz FSB.
  • An “EB” means it’s a Coppermine running at 133Mhz FSB.
  • If there is only one processor type at a certain speed, then these labels are not used.
  • Every Intel CPU running at 650Mhz or higher is a Coppermine.
  • Every Coppermine CPU that is running at less than 650Mhz is designated by Intel with an “E” or “EB” tag, which you should see in any retail ad. If the ad doesn’t say that, don’t assume it’s a Coppermine, it may not be.
  • All Coppermines run at 1.6V or 1.65V, and that should be clearly marked on the CPU. Katmais run at 2.0V.

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