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Does Intel's Dual-Core Atom Improve Efficiency?

Power Supply, CPU Comparison Table

A Suitable Power Supply is the Key to Efficiency

Once again, we used our compact, low-power 220 W Fortron FSP220 power supply. It is very important to match the power supply output to the loads you are expecting. Most power supplies are only efficient at common load states such as the ones defined by 80plus: depending on the efficiency you get at 20%, 50% and 100% load, you get a standard, bronze, silver or gold certificate. However, the testing doesn’t take into account very low loads, such as occur in the case of the test systems in this review. Consider that 30 to 60 W is 3-6% load in the case of a 1,000 W PSU, and efficiency is typically horrible in such a scenario, to say the least. However, a 30-60 W load is in the area of 13% to 27% of a 220 W supply, which takes us back into more efficient operating modes.

Keep in mind that the correct power supply is most important for low power or for high efficiency systems. If you don’t pay attention to this, it doesn’t even make sense to worry about the other system components.

CPU Comparison Table

ManufacturerIntelIntelIntel
NameAtom 230Atom 330Core 2 Duo
Clock Speed159615962529
Code NameDiamondvilleDiamondvilleWolfdale
Based Onx86-64x86-64x86-64
Cores122
L1 Cache282828
L2 Cache508508508
InterfaceFSB800FSB800FSB800
Hyper ThreadingYesYesNo
Instruction  SetsMMX, SSE, SSE2, SSE3, SSSE3MMX, SSE, SSE2, SSE3, SSSE3MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, TXT
Buffer Overflow ProtectionXD bitXD bitXD bit
On- Die EncryptionNoNoNo
Die Size222 x 26 mm²77
Transistors432 x 47 million270
Package1818Flip-Chip Land Grid Array (FC-LGA6), LGA 775
Processed Technology45 nm45 nm45 nm
TDP4 W8 W61