Reply 10560 of 56773, by kithylin
- Rank
- l33t
wrote:wrote:wrote:I like the idea of using a newer S775 boards with these chips. Does the newer chipset and memory make much of a difference compared to running these chips on a period correct board?
I have a 3.2 prescott in this 775 board right now to play with while I wait for the cedar mill chips to arrive. I'm not sure if it's any faster or slower than the older boards.. I need to hunt down some old benchmarks for when these prescott 775 chips were new here in a little while then try to replicate em and compare.
I can't get this prescott chip to budge a single +1 mhz over stock for some odd reason in this board. It just goes in to an endless boot-loop when I try then comes back stock again. Then again this thing only lets me put max 1.4v v-core on these old prescott chips.. and at stock intel runs this 3.2 chip at 1.36v already, so that might be why.
Yes Prescotts are very power hungry some LGA 775 boards only conform to 85 watt TDP standards which leaves little headroom for overclocking and 115 watt TDP Prescott like the 670 will run at a reduced multiplier in theses boards. Cedar Mill P4s are 65nm and more energy efficient never had one myself but they are supposed to overclock better than Prescotts you should get 4Ghz easy out of those Cedar Mills
And I found an old page.. I might link it later. But basically the cedar mill P4's, some of them received a "refresh" near the tail end of their life. In september and august 2006 Intel released D0 stepping for the Pentium 4 6x1 chips. D0 revision added EIST, C1E, and ThermalMonitor2, and also received power circuitry from the core2 line, which reduced TDP from the 86W envelope down to 65W for D0.
Effected processors and stepping codes are here:
Pentium 4 661 (3.6 GHz): SL96H (C1) - > SL9KD (D0);
Pentium 4 651 (3.4 GHz): SL96J (C1) - > SL9KE (D0);
Pentium 4 641 (3.2 GHz): SL96K (C1) - > SL9KF (D0);
Pentium 4 631 (3.0 GHz): SL96L (C1) - > SL9KG (D0).
The visual differences are seen here:
C1 (Left) and D0 (Right)
So reading all of this, I specifically bought the D0 chips, found by their stepping code in ebay. 😀