Pentium G645 vs i7-990X

VS

Aggregate performance score

Core i7-990X
2011
6 cores / 12 threads, 130 Watt
4.50
+400%
Pentium G645
2012
2 cores / 2 threads, 65 Watt
0.90

Core i7-990X outperforms Pentium G645 by a whopping 400% based on our aggregate benchmark results.

Primary details

Comparing Core i7-990X and Pentium G645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking13202549
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation0.230.06
Market segmentDesktop processorDesktop processor
Power efficiency3.271.31
Architecture codenameGulftown (2010−2011)Sandy Bridge (2011−2013)
Release date24 February 2011 (13 years ago)2 September 2012 (12 years ago)
Launch price (MSRP)$1,104$80

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-990X has 283% better value for money than Pentium G645.

Detailed specifications

Core i7-990X and Pentium G645 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores6 (Hexa-Core)2 (Dual-core)
Threads122
Base clock speed3.46 GHz2.9 GHz
Boost clock speed3.73 GHz2.9 GHz
Bus rate6.4 GT/s5 GT/s
L1 cache64 KB (per core)64 KB (per core)
L2 cache256 KB (per core)256 KB (per core)
L3 cache12 MB (shared)3 MB (shared)
Chip lithography32 nm32 nm
Die size239 mm2131 mm2
Maximum core temperature68 °C69 °C
Number of transistors1,170 million504 million
64 bit support++
Windows 11 compatibility--
Unlocked multiplier+-

Compatibility

Information on Core i7-990X and Pentium G645 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration11
SocketFCLGA1366,LGA1366FCLGA1155
Power consumption (TDP)130 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-990X and Pentium G645. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2Intel® SSE4.1, Intel® SSE4.2
AES-NI++
AVX-+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology1.0-
Hyper-Threading Technology+-
Idle States++
Thermal Monitoring-+
Flex Memory Accessno data+
Demand Based Switching-no data
PAE36 Bitno data
FDIno data+
Fast Memory Accessno data+

Security technologies

Core i7-990X and Pentium G645 technologies aimed at improving security, for example, by protecting against hacks.

TXT--
EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-990X and Pentium G645 are enumerated here.

VT-dno data-
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-990X and Pentium G645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3
Maximum memory size24 GB32 GB
Max memory channels32
Maximum memory bandwidth25.6 GB/s17 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataIntel HD Graphics for 2nd Generation Intel Processors
Graphics max frequencyno data1.1 GHz

Graphics interfaces

Available interfaces and connections of Core i7-990X and Pentium G645 integrated GPUs.

Number of displays supportedno data2

Peripherals

Specifications and connection of peripherals supported by Core i7-990X and Pentium G645.

PCIe version2.02.0

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

i7-990X 4.50
+400%
Pentium G645 0.90

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i7-990X 7153
+401%
Pentium G645 1429

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i7-990X 557
+22.7%
Pentium G645 454

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i7-990X 2606
+237%
Pentium G645 773

Gaming performance

Pros & cons summary


Performance score 4.50 0.90
Recency 24 February 2011 2 September 2012
Physical cores 6 2
Threads 12 2
Power consumption (TDP) 130 Watt 65 Watt

i7-990X has a 400% higher aggregate performance score, and 200% more physical cores and 500% more threads.

Pentium G645, on the other hand, has an age advantage of 1 year, and 100% lower power consumption.

The Core i7-990X is our recommended choice as it beats the Pentium G645 in performance tests.


Should you still have questions on choice between Core i7-990X and Pentium G645, ask them in Comments section, and we shall answer.

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Intel Core i7-990X
Core i7-990X
Intel Pentium G645
Pentium G645

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Community ratings

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Questions & comments

Here you can ask a question about Core i7-990X or Pentium G645, agree or disagree with our judgements, or report an error or mismatch.