Intel Pentium G645 vs G2020 |
Intel Pentium G645
- 2.9 GHz
- Dual core
Reasons to buy the Intel Pentium G645
 | Much better turbo clock speed 1,100 MHz |
Intel Pentium G2020
- 2.9 GHz
- Dual core
Reasons to buy the G2020
| | Much newer manufacturing process 22 nm | | More number of displays supported 3 |
| | Lower typical power consumption 44.69W | | Lower annual home energy cost 13.25 $/year |
Budget-minded desktop users need a reasonably priced processor which is capable of providing decent performance, while still easy on the wallet. Here are two CPUs which fit the bill: the Intel Pentium G645 versus the Intel Pentium G2020. Let’s see which one offers the better overall value.
The G645 and the G2020 are part of the Pentium Brand, but they’re one generation apart. They even share most of the basic essentials: Dual cores clocked at 2.9 GHz with 3 MB cache. The main difference is that the G2020 is newer by 4 months, and is part of the more recent Ivy Bridge architecture. This results to a smaller manufacturing process of 22nms (versus 32nms), which in effectively contributes to a lower TDP of 55W (versus 65W) for the G2020. How do these specifications translate in terms of real world performance.
Unsurprisingly, the newer architecture resulted to better performance for the G2020: it acquired 7% better scores in the PassMark test and 5% in the Single Core benchmark. If you take into consideration the fact that they’re within the same price range (give or take $5), we clearly recommend the Intel Pentium G2020 for its higher performance per dollar ratio as a better value over the Intel Pentium G645.
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Differences What are the advantages of each
| |||||||
| Much better turbo clock speed | 1,100 MHz | vs | 1,050 MHz | Around 5% better turbo clock speed | |||
|---|---|---|---|---|---|---|---|
| |||||||
| Much newer manufacturing process | 22 nm | vs | 32 nm | A newer manufacturing process allows for a more powerful, yet cooler running processor | |||
| More number of displays supported | 3 | vs | 2 | 1 more number of displays supported | |||
| Lower typical power consumption | 44.69W | vs | 52.81W | More than 15% lower typical power consumption | |||
| Lower annual home energy cost | 13.25 $/year | vs | 15.66 $/year | More than 15% lower annual home energy cost | |||
| Lower annual commercial energy cost | 48.18 $/year | vs | 56.94 $/year | More than 15% lower annual commercial energy cost | |||
Report a correction
Benchmarks Real world tests of Pentium G645 vs G2020
GeekBench 3 (Multi-core) Data courtesy Primate Labs
GeekBench 3 (Single core) Data courtesy Primate Labs
GeekBench 3 (AES single core) Data courtesy Primate Labs
GeekBench (32-bit) Data courtesy Primate Labs
GeekBench (64-bit) Data courtesy Primate Labs
GeekBench
PassMark Data courtesy Passmark
PassMark (Single Core)
Specifications Full list of technical specs
summary | Pentium G645 | vs | G2020 |
|---|---|---|---|
| Clock speed | 2.9 GHz | 2.9 GHz | |
| Cores | Dual core | Dual core | |
| Socket type | |||
| LGA 1155 | |||
features | |||
| Has a NX bit | Yes | Yes | |
| Supports trusted computing | No | No | |
| Has virtualization support | Yes | Yes | |
| Instruction set extensions | |||
| SSE2 | |||
| MMX | |||
| SSE4 | |||
| SSE3 | |||
| SSE | |||
| SSE4.1 | |||
| SSE4.2 | |||
| Supplemental SSE3 | |||
| Supports dynamic frequency scaling | Yes | Yes | |
power consumption | |||
| TDP | 65W | 55W | |
| Annual home energy cost | 15.66 $/year | 13.25 $/year | |
| Annual commercial energy cost | 56.94 $/year | 48.18 $/year | |
| Performance per watt | 2.37 pt/W | 2.11 pt/W | |
| Typical power consumption | 52.81W | 44.69W | |
bus | |||
| Architecture | DMI | DMI | |
| Number of links | 1 | 1 | |
| Transfer rate | 5,000 MT/s | 5,000 MT/s | |
details | Pentium G645 | vs | G2020 |
|---|---|---|---|
| Architecture | x86-64 | x86-64 | |
| Threads | 2 | 2 | |
| L2 cache | 1 MB | 1 MB | |
| L2 cache per core | 0.5 MB/core | 0.5 MB/core | |
| L3 cache | 3 MB | 3 MB | |
| L3 cache per core | 1.5 MB/core | 1.5 MB/core | |
| Manufacture process | 32 nm | 22 nm | |
| Max CPUs | 1 | 1 | |
| Clock multiplier | 29 | 29 | |
overclocking | |||
| Overclock popularity | 0 | 3 | |
| Overclocked clock speed | 3 GHz | 3.03 GHz | |
| Overclocked clock speed (Water) | 3.09 GHz | 3.1 GHz | |
| PassMark (Overclocked) | 2,170.6 | 2,960.3 | |
| Overclocked clock speed (Air) | 3 GHz | 3.03 GHz | |
integrated graphics | |||
| GPU | GPU | GPU | |
| Label | Intel® HD Graphics | Intel® HD Graphics | |
| Number of displays supported | 2 | 3 | |
| GPU clock speed | 850 MHz | 650 MHz | |
| Turbo clock speed | 1,100 MHz | 1,050 MHz | |
memory controller | |||
| Memory controller | Built-in | Built-in | |
| Memory type | |||
| DDR3-1333 | |||
| DDR3-1066 | |||
| DDR3 | |||
| Channels | Dual Channel | Dual Channel | |
| Maximum bandwidth | 17,066.66 MB/s | 21,333.32 MB/s | |
| Maximum memory size | 32,768 MB | 32,768 MB | |
 Intel Pentium G645  Report a correction |  Intel Pentium G2020 Report a correction |
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