Intel's Pentium 4 E: Prescott Arrives with Luggage

So, what’s being launched today?

Intel has dropped one hell of a package on our doorsteps today and we’ve made it through all of the architecture, but can we make sense of their marketing? We kid, we kid, it’s not all that bad.

Intel wants to shift all Pentium 4s over to Prescott as soon as possible, mostly because once production ramps up it will be cheaper for Intel to make a 112 mm^2 Prescott than it is for them to make a 131 mm^2 Northwood. Therefore Prescott launches at clock speeds that are equivalent to currently available Northwoods.

In Intel’s usual style, if there are two different cores with the same clock speed Intel will use a single letter to differentiate them. In the case of Prescott the magic letter is ‘E’, so all ‘E’ processors will mean they are Prescott based.

Prescott is being launched today at four clock speeds, giving us the following:

Pentium 4 3.40E
Pentium 4 3.20E
Pentium 4 3.00E
Pentium 4 2.80E

But don’t get too excited, the 3.40E chip isn’t actually available yet and to make up for that fact Intel also released a Northwood based 3.40GHz Pentium 4. The Northwood based Pentium 4 3.40GHz is currently available, but within the coming months you’ll see them replaced with Prescott based 3.40Es.

In an interesting move by Intel, Northwoods and Prescotts at the same clock speed will be priced identically. Intel is hoping that the price parity will make people choose Prescott over Northwood (why not? You get twice as much cache for free!) but this policy also works in our favor. In order for most vendors to get rid of Northwood inventory you can expect prices to be cheaper than Prescotts.

With a BIOS update these ‘E’ CPUs will work on currently 875/865 motherboards, but check with your motherboard manufacturer first to make sure. We will have a motherboard compatibility article out as soon as possible to document any combinations you should stay away from.

Today Intel is also introducing the Pentium 4 Extreme Edition running at 3.4GHz. This EE is based on the same 0.13-micron process as its predecessor; although there are currently no plans for a 90nm Extreme Edition you can expect one to appear once Prescott begins to approach Extreme Edition performance.