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Gaming Performance Comparison

Recommended System Requirements
Game Pentium G3420 3.2GHz Core i5-670 3.46GHz
Cyberpunk 2077 86% 90%
Hitman 3 151% 156%
Assassins Creed: Valhalla 151% 156%
Call of Duty: Black Ops Cold War 80% 84%
FIFA 21 74% 78%
Grand Theft Auto VI 206% 213%
Far Cry 6 194% 200%
Genshin Impact 41% 44%
Battlefield 6 160% 166%
Resident Evil 8 107% 111%

In terms of overall gaming performance, the Intel Pentium G3420 3.2GHz is marginally better than the Intel Core i5-670 3.46GHz when it comes to running the latest games. This also means it will be less likely to bottleneck more powerful GPUs, allowing them to achieve more of their gaming performance potential.

The Pentium G3420 3.2GHz was released over three years more recently than the Core i5-670 3.46GHz, and so the Pentium G3420 3.2GHz is likely to have far better levels of support, and will be much more optimized and ultimately superior to the Core i5-670 3.46GHz when running the latest games.

The Pentium G3420 3.2GHz and the Core i5-670 3.46GHz both have 2 cores, and so are quite likely to struggle with the latest games, or at least bottleneck high-end graphics cards when running them. With a decent accompanying GPU, the Pentium G3420 3.2GHz and the Core i5-670 3.46GHz may still be able to run slightly older games fairly effectively.

The Core i5-670 3.46GHz has 2 more threads than the Pentium G3420 3.2GHz. The Pentium G3420 3.2GHz has one thread per physical core, whereas the Core i5-670 3.46GHz uses hyperthreading and has 2 logical threads per physical core.

Multiple threads are useful for improving the performance of multi-threaded applications. Additional cores and their accompanying thread will always be beneficial for multi-threaded applications. Hyperthreading will be beneficial for applications optimized for it, but it may slow others down. For games, the number of threads is largely irrelevant, as long as you have at least 2 cores (preferably 4), and hyperthreading can sometimes even hit performance.

More important for gaming than the number of cores and threads is the clock rate. Problematically, unless the two CPUs are from the same family, this can only serve as a general guide and nothing like an exact comparison, because the clock cycles per instruction (CPI) will vary so much.

The Pentium G3420 3.2GHz and Core i5-670 3.46GHz are not from the same family of CPUs, so their clock speeds are by no means directly comparable. Bear in mind, then, that while the Core i5-670 3.46GHz has a 0.26 GHz faster frequency, this is not always an indicator that it will be superior in performance, despite frequency being crucial when trying to avoid GPU bottlenecking. As such, we need to look elsewhere for more reliable comparisons.

Aside from the clock rate, the next-most important CPU features for PC game performance are L2 and L3 cache size. Faster than RAM, the more cache available, the more data that can be stored for lightning-fast retrieval. L1 Cache is not usually an issue anymore for gaming, with most high-end CPUs eking out about the same L1 performance, and L2 is more important than L3 - but L3 is still important if you want to reach the highest levels of performance. Bear in mind that although it is better to have a larger cache, the larger it is, the higher the latency, so a balance has to be struck.

The Pentium G3420 3.2GHz and the Core i5-670 3.46GHz have the same L2 cache size, but the Core i5-670 3.46GHz has a 1 MB bigger L3 cache, so in this area, it wins out over the Pentium G3420 3.2GHz.

The maximum Thermal Design Power is the power in Watts that the CPU will consume in the worst case scenario. The lithography is the semiconductor manufacturing technology being used to create the CPU - the smaller this is, the more transistors that can be fit into the CPU, and the closer the connections. For both the lithography and the TDP, it is the lower the better, because a lower number means a lower amount of power is necessary to run the CPU, and consequently a lower amount of heat is produced.

The Pentium G3420 3.2GHz has a 19 Watt lower Maximum TDP than the Core i5-670 3.46GHz, and was created with a 10 nm smaller manufacturing technology. What this means is the Pentium G3420 3.2GHz will consume slightly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill slightly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

The Pentium G3420 3.2GHz and the Core i5-670 3.46GHz both have an on-board GPU, which means that they will be capable of running basic graphics applications (i.e., games) without the need for a dedicated graphics card.

For an in-depth GPU comparison, click on the GPU comparison icon that you can find throughout Game-Debate:

On-board GPUs tend to be fairly awful in comparison to dedicated cards from the likes of AMD or Nvidia, but as they are built into the CPU, they also tend to be cheaper and require far less power to run (this makes them a good choice for laptops). We would recommend a dedicated card for running the latest games, but integrated GPUs are improving all the time and casual gamers may find less recent games perform perfectly acceptably.

CPU Core Details

CPU CodenameHaswellClarkdale
MoBo SocketSocket 1150 / H3 / LGA1150LGA 1156/Socket H
Notebook CPUnono
Release Date01 Sep 201307 Jan 2010
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs2
CPU Threads2vs4
Clock Speed3.2 GHzvs3.46 GHz
Turbo Frequency-vs3.73 GHz
Max TDP54 Wvs73 W
Lithography22 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature72°Cvs73°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size128 KBvs128 KB
L2 Cache Size512 KBvs512 KB
L2 Cache Speed-vs-
L3 Cache Size3 MBvs4 MB
Max Memory Size-vs16 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsIntel HD Graphics Desktop (Haswell)HD i5 670
Base GPU Frequency650 MHzvs733 MHz
Max GPU Frequency1250 MHzvs-
DirectX11.1vs10
Displays Supported-vs-
Comparison

CPU Package and Version Specifications

Package Size-vs-
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewPentium G3420 3.2GHz is a budget processor based on the 22nm, Haswell architecture.

It offers 2 Physical Cores (2 Logical), clocked at 3.2GHz and 3MB of L3 Cache.
Among its many features, Virtualization is activated.

The processor integrates very weak Graphics called Intel HD Graphics Desktop (Haswell), with 10 Execution Units, initially clocked at 350MHz and that go up to 1150MHz, in Turbo Mode which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 54W.

It offers average performance. This means it will become a bottleneck in some demanding applications.
Core i5-670 3.46GHz is a performance CPU based on the 45nm, Nehalem architecture.

It offers 2 Physical Cores (4 Logical), initially clocked at 3.46GHz, which may go up to 3.73GHz and 4MB of L3 Cache.
Among its many features, Hyper-Threading, Turbo Boost and Virtualization are activated.

The processor integrates very weak Graphics called Intel i5 670, with XX Execution Units, clocked at 733MHz which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 73W.

It offers average performance. This means it will become a bottleneck in some demanding applications.