We have already discussed new quad-core Penryn processors in detail in our Core 2 Extreme QX9650 Review. All in all, our today’s hero, Core 2 Quad Q9300, doesn’t differ from the QX9650 from architectural standpoint. It is built with two dual-core semiconductor Wolfdale dies stuffed into a single processor packaging. These dies communicate with one another via the front side bus and system memory, just like the dies of the quad-core Kentsfield processors.
The clock frequency of Core 2 Quad Q9300 processor, the youngest Yorkfield CPU, is 2.5GHz, the front side bus frequency is 333MHz (1333MHz quad-pumped). Just like Wolfdale processors, Yorkfield supports fractional multipliers with 0.5x increment, which explains where its unusual clock frequency comes from: it is obtained with a 7.5x multiplier.
Compared with other members of Core 2 Quad Q9000 processor family, the solution reviewed today boasts one distinguishing feature: smaller L2 cache. Instead of the 6MB for each pair of cores we would expect it to have, Core 2 Quad Q9300 has the total of 6MB of L2 cache memory. In other words, each of the dual-core dies within this processor features an L2 cache half the size: only 3MB.
Diagnostic utilities, such as CPU-Z, for instance, detect this peculiarity flawlessly:
The clock frequency of Core 2 Quad Q9300 processor, the youngest Yorkfield CPU, is 2.5GHz, the front side bus frequency is 333MHz (1333MHz quad-pumped). Just like Wolfdale processors, Yorkfield supports fractional multipliers with 0.5x increment, which explains where its unusual clock frequency comes from: it is obtained with a 7.5x multiplier.
Compared with other members of Core 2 Quad Q9000 processor family, the solution reviewed today boasts one distinguishing feature: smaller L2 cache. Instead of the 6MB for each pair of cores we would expect it to have, Core 2 Quad Q9300 has the total of 6MB of L2 cache memory. In other words, each of the dual-core dies within this processor features an L2 cache half the size: only 3MB.
Diagnostic utilities, such as CPU-Z, for instance, detect this peculiarity flawlessly:
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