Pentium 3 733MHZ vs. Pentium 4 2.2GHz

[mikeshn]

Does Pemtium 4 2.2GHz has more cache ( L1 and L2) than Pentium 3 733 MHz. If so By How much?

 

[Accord99]

Coppermine P3 has:

16KB L1 instruction cache
16KB L1 data cache
256KB L2 cache

Northwood P4 has:

12K micro-ops trace cache (maybe equivalent to a 96KB P3 instruction cache)
8KB L1 data cache
512KB L2 cache

 

[mikeshn]

Thanks.. But I don't get what are Coppermine and Borthwood. They are moddels.. Right? Also what is major differnce between L1 and L2? Thanks

 

[Accord99]

Coppermine and Northwood refers to Intel's codename for the 0.18um Pentium 3 (such as your 733MHz P3) and the 0.13um Pentium 4 (such as the 2.2GHz P4) respectively.

L1 is built to be fast and consequentially, cannot be too large. The P3's L1 cache takes 3 cpu cycles to access, while the P4's takes only 2 cycles.

L2 has less limitations on speed and can be of much larger size. The P3 and P4's L2 cache are both specified to have a fast 7 cycle L2 cache. However, the P4 's L2 cache is capable of twice the bandwidth.

 

[mikeshn]

Thanks a lot .. If you can please answer my last question... WHy L1 Cache cannot BE to large.. And why L2 has limitations in speed. ALso
0.13um what kind of units it is.
Thanks

 

[GoldMember]

I got a Southwood.. lol.. Intel sucks..

 

[Sid03]

<< I got a Southwood.. lol.. Intel sucks.. >>

as does your input, obviously. why even bother posting in mikeshn's thread, if you aren't going to offer anything constructive?

 

[AndyHui]

The size of the L1 and L2 cache are directly proportional to the time taken to access them. A larger L1 cache will mean that it takes longer to access data.

Cache also takes up a significant amount of silicon, where processors have cache integrated these days....this increases cost, power consumption and heat output.

0.18 micron and 0.13 micron refer to the size of the transistors used in the processors.

 

[BadThad]

0.13um what kind of units it is.

µ = micro
m = meters

or 10^-6 meters, also called "microns"