Intel Core i7-4771 vs Intel Core i7-990X

Table of Contents

Physical Specifications

Socket Intel Socket 1150 Intel Socket 1366
Foundry Intel Intel
Process size 22 nm 32 nm
Transistors 1,400 million 1,170 million
Die size 177 mm² 239 mm²
Package FC-LGA10
tCaseMax 72°C

Performance

Frequency 3.5 GHz 3.466 GHz
Turbo clock up to 3.9 GHz up to 3.733 GHz
Base clock 100 MHz 133 MHz
Multiplier 35.0x 26.0x
Multiplier unlocked No Yes
TDP 84 W 130 W
Voltage 1.375 V

Architecture Details

Vertical Segment Desktop Desktop
Production status Active End-of-life
Release date Sep 1st, 2013 Feb 24th, 2011
Codename Haswell Gulftown
Generation Core i7 Core i7
Part SR1BW SLBVZ
Memory support DDR3 Dual-channel DDR3 Triple-channel
ECC memory No No
PCI Express Gen 3 Gen 2

Cores

Total Cores 4 6
Total Threads 8 12
SMP # CPUs 1 1
Integrated graphics Intel HD 4600

Cache

Cache L1 64K (per core) 64K (per core)
Cache L2 256K (per core) 256K (per core)
Cache L3 8MB (shared) 12MB (shared)

Features & Technologies

AES-NI Yes
AVX Yes
AVX2 Yes
BMI1 Yes
BMI2 Yes
Boost 2.0 Yes
CLMUL Yes
EIST Yes
F16C Yes
FMA3 Yes
HTT Yes Yes
Intel 64 Yes Yes
MMX Yes Yes
SSE Yes Yes
SSE2 Yes Yes
SSE3 Yes Yes
SSE4.2 Yes Yes
SSSE3 Yes
TSX Yes
TXT Yes
VT-d Yes
VT-x Yes
XD bit Yes
vPro Yes

Notes

Notes This processor comes with an unlocked FSB multiplier, allowing users to set the multiplier value higher than shipped value, to facilitate better overclocking. It is branded under the Extreme Edition label.

Compare

Sysrqmts browser extension icon
Stop overpaying for PC games!
See cheapest prices in Steam store with our browser extension.