Combined benchmark scores for both processors
Head-to-head processor comparison
Combined benchmark scores for both processors
Out of 2,060 results in the database
Rank #2,056
Rank #733
Xeon E5-2666 v3 wins by 30.7% (Rank #2056 vs #733)
Out of 2,060 results in the database
Rank #2,055
Rank #747
Xeon E5-2666 v3 wins by 39.9% (Rank #2055 vs #747)
Out of 2,060 results in the database
Rank #2,015
Rank #641
Xeon E5-2666 v3 wins by 16.1% (Rank #2015 vs #641)
Out of 1,771 results in the database
Rank #1,770
Rank #402
Xeon E5-2666 v3 wins by 11% (Rank #1770 vs #402)
Out of 1,771 results in the database
Rank #1,771
Rank #397
Xeon E5-2666 v3 wins by 12.6% (Rank #1771 vs #397)
Out of 1,771 results in the database
Rank #1,767
Rank #399
Xeon E5-2666 v3 wins by 11.1% (Rank #1767 vs #399)
Side-by-side comparison of key specifications
| Specification | Atom Z520 | Xeon E5-2666 v3 | Diff |
|---|---|---|---|
| Cores |
1
|
10
|
-90% |
| Threads |
2
|
20
|
-90% |
| Base Frequency |
1,333 MHz
|
2,900 MHz
|
-54% |
| Clock Multiplier |
10x
|
29x
|
-65.5% |
| L1 Cache |
56 KB
|
62 KB
|
-10.3% |
| L2 Cache |
1 MiB
|
0 MiB
|
+51.2% |
| L3 Cache | -- |
24 MiB
|
|
| Max CPUs |
1
|
-- | |
| TDP (lower is better) |
2 W
|
135 W
|
98.5% less |
| Process (lower is better) |
45 nm
|
22 nm
|
51.1% more |
| Specification | Atom Z520 | Xeon E5-2666 v3 |
|---|---|---|
| Designer | Intel | Intel |
| Family | Atom | -- |
| Series | Z500 | -- |
| Model Number | Z520 | -- |
| Microarchitecture | Bonnell | -- |
| Core Name | Silverthorne | Haswell-EP |
| Core Family | 6 | -- |
| Core Model | 28 | -- |
| Socket | BGA-441 | Socket 2011-3 |
| Package | FCBGA-441 | FC-LGA12A |
| Chipset | Poulsbo | -- |
| Memory Type | -- | DDR3, DDR42133 MHz Quad-channel |
| Market Segment | Mobile | Server/Workstation |
| Release Price | $65.00 | -- |
| Locked Multiplier | Yes | Yes |
Designer
Family
Series
Model Number
Microarchitecture
Core Name
Core Family
Core Model
Socket
Package
Chipset
Memory Type
Market Segment
Release Price
Locked Multiplier
Manufacturing process and die characteristics
| Specification | Atom Z520 | Xeon E5-2666 v3 |
|---|---|---|
| Process | 45 nm | 22 nm |
| Die Area | 24.18 mm² | 356 mm² |
| Transistor Count | 0.05 billion | 2,600 |
| Manufacturer | Intel | Intel |
| Technology | CMOS | -- |
| Word Size | 32-bit | -- |
| ISA | x86-32 (x86) | -- |
Process
Die Area
Transistor Count
Manufacturer
Technology
Word Size
ISA
Supported instruction set extensions comparison
| Extension | Atom Z520 | Xeon E5-2666 v3 |
|---|---|---|
| AES | ||
| AVX | ||
| AVX2 | ||
| BMI1 | ||
| BMI2 | ||
| CLMUL | ||
| EIST | ||
| EMMX | ||
| EPT | ||
| F16C | ||
| FMA | ||
| FMA3 | ||
| FPU | ||
| Flex Memory | ||
| HT | ||
| IPT | ||
| MMX | ||
| NX | ||
| Protected | ||
| Real | ||
| SIPP | ||
| SMEP | ||
| SMM | ||
| SSE | ||
| SSE2 | ||
| SSE3 | ||
| SSE4.1 | ||
| SSE4.2 | ||
| SSSE3 | ||
| Secure Key | ||
| TSX | ||
| TXT | ||
| VT-d | ||
| VT-x | ||
| vPro | ||
| x86-16 | ||
| x86-32 | ||
| x86-64 |
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