Category Archives: Pentium 4

HTT Means Hyper-Threading, Right?

In a logical, ordered world, the HTT bit in CPUID would indicate a processor with Hyper-Threading Technology enabled. But of course the world with Intel inside is anything but logical. The actual meaning of the HTT bit changed several times … Continue reading

Posted in Documentation, Intel, Pentium 4 | 13 Comments

Top of the Class 478

So I have that old Intel D865PERL board, which is a Socket 478/AGP board. There’s a 3.2 GHz Northwood in it but of course I was wondering, what’s the fastest CPU this board supports? And it turns out to be a … Continue reading

Posted in Intel, PC hardware, PC history, Pentium 4 | 5 Comments

Mystery NetBurst

Some time ago, a mysterious CPU showed up at the OS/2 Museum: It is a Socket 775 CPU with a Pentium 4 label and the following markings: 3.73 GHZ/1M/1066/A4. In other words, 3.73 GHz clock speed, 1 MB L2 cache, … Continue reading

Posted in Intel, Pentium 4 | 20 Comments

Fun with AGP

Several months ago, I retook possession of a PC which I had built back in 2003 (I think—it’s been a while). It is based on an Intel D865PERL (Rock Lake) board and a Northwood 3.2 GHz Pentium 4 with hyper-threading (HT). … Continue reading

Posted in AGP, Pentium 4 | 26 Comments