Intel Pentium 4 2.8 GHz

A regular production Pentium 4 2.8GHz with an interesting twist: it runs on a 100MHz (QDR400) FSB! Most 2.8 GHz parts use a 200MHz (QDR800) FSB and the 'old' high-end use the 133MHz (QDR533) FSB. For a 2.8 GHz part it makes sense to use a 133MHz bus or higher to avoid creating bottlenecks. Intel also released a 3 GHz part with a 100MHz (QDR400) bus but I've never seen one; high clocked models on such a slow bus are quite rare.

For Office work the slow bus usually doesn't matter so much. High-end creation/gaming is a different story because those tasks rely on a fast bus and fast memory access.

Also, this CPU allows an extended upgrade path for those who want to stretch their previous S423 system. Using a PowerLeap S423 to S478 adapter you can instantly upgrade to 2.8 GHz whereas 'true' S423 CPU's only went up to 2 GHz.

Specifications
Core / Codename
Clockfrequency
2800MHz
Front Side Bus
100MHz (QDR400)
Multiplier
14x
vCore
1,525V
L1 cache
12KB + 8KB
L2 cache
512KB On-die fullspeed
sSpec
SL7EY
Chip date
0414
Stepping
D1
Socket
Transistor count
37,2M
Condition
CPU only
Engineering sample?
No

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