Intel Pentium G645 vs G2020 |
Intel Pentium G645
- 2.9 GHz
- Dual core
Reasons to buy the Intel Pentium G645
 | Higher GPU clock speed 850 MHz | | Better turbo clock speed 1,100 MHz |
Intel Pentium G2020
- 2.9 GHz
- Dual core
Reasons to buy the G2020
| | Newer manufacturing process 22 nms | | More number of displays supported 3 |
| | Better performance per dollar 7.73 pt/$ | | Slightly lower typical power consumption 44.69W |
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 $5), we clearly recommend the Intel Pentium G2020 for its higher performance per dollar ratio as a better value over the Intel Pentium G645.
CPUBoss Review Our evaluation of G645 vs G2020
Performance | |
Benchmark performance using all cores | |
| Passmark and GeekBench (32-bit) | |
Single-core Performance | |
Individual core benchmark performance | |
| Passmark (Single Core) | |
Overclocking | |
How much speed can you get out of the processor? | |
| Passmark (Overclocked), Maximum Overclocked Clock Speed (Air) and 2 more | |
Value | |
Are you paying a premium for performance? | |
| Performance Per Dollar | |
No winner declared
Too close to call
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Differences What are the advantages of each
| |||||||
| Higher GPU clock speed | 850 MHz | vs | 650 MHz | More than 30% higher GPU clock speed | |||
|---|---|---|---|---|---|---|---|
| Better turbo clock speed | 1,100 MHz | vs | 1,050 MHz | Around 5% better turbo clock speed | |||
| |||||||
| Newer manufacturing process | 22 nms | vs | 32 nms | A newer manufacturing process allows for a more powerful, yet cooler running processor | |||
| More number of displays supported | 3 | vs | 2 | 1 more number of displays supported | |||
| Better performance per dollar | 7.73 pt/$ | vs | 6.19 pt/$ | Around 25% better performance per dollar | |||
| Slightly lower typical power consumption | 44.69W | vs | 52.81W | More than 15% lower typical power consumption | |||
| Better PassMark (Overclocked) score | 2,960.3 | vs | 2,170.6 | More than 35% better PassMark (Overclocked) score | |||
| Better performance per watt | 8.43 pt/W | vs | 6.48 pt/W | More than 30% better performance per watt | |||
| Marginally newer | Jan, 2013 | vs | Sep, 2012 | Release date 4 months later | |||
| Lower annual commercial energy cost | 48.18 $/year | vs | 56.94 $/year | More than 15% lower annual commercial energy cost | |||
| Slightly lower annual home energy cost | 13.25 $/year | vs | 15.66 $/year | More than 15% lower annual home energy cost | |||
Report a correction
Benchmarks Real world tests of Pentium G645 vs G2020
GeekBench (32-bit)
GeekBench
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 | |||
| Is hyperthreaded | No | No | |
features | |||
| Has a NX bit | Yes | Yes | |
| Supports trusted computing | No | No | |
| Has vitualization support | Yes | Yes | |
| Instruction-set-extensions | |||
| MMX | |||
| SSE | |||
| SSE4.2 | |||
| SSE3 | |||
| SSE2 | |||
| Supplemental SSE3 | |||
| SSE4.1 | |||
| SSE4 | |||
| Supports dynamic frequency scaling | Yes | Yes | |
gpu | |||
| 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 | |||
| 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 | |
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 nms | 22 nms | |
| Max CPUs | 1 | 1 | |
| Clock multiplier | 29 | 29 | |
overclocking | |||
| Overclock popularity | 0 | 3 | |
| Overclocked clock speed | 3.02 GHz | 3.04 GHz | |
| Overclocked clock speed (Water) | 3.08 GHz | 3.01 GHz | |
| PassMark (Overclocked) | 2,170.6 | 2,960.3 | |
| Overclocked clock speed (Air) | 3.02 GHz | 3.04 GHz | |
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 | 6.48 pt/W | 8.43 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 | |
 Intel Pentium G645  Report a correction |  Intel Pentium G2020 Report a correction |
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