AMD Phenom II X6 1090T 6-core AM3
The 45nm Thuban die packs six cores with a 3.6GHz boost and an unlocked multiplier, making it a capable multitasker for its era. Its 6MB L3 cache and 125W TDP come with a boxed cooler, and the AM3 socket fits older DDR3 motherboards. This is best for budget builders upgrading a legacy AM3 system who need six cores for productivity without buying new hardware.
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Resumen
The 30-Second Version
A six-core relic with an unlocked multiplier and a 125W appetite. Fun for nostalgia, terrible for anything modern.
Pros & Cons
Ventajas
- Unlocked multiplier makes overclocking to 4GHz genuinely easy 78th
- Six real cores for dirt cheap on the used market 75th
- Drops into old AM3 boards without a platform swap
- Boxed cooler included, though you'll want better for overclocking
Desventajas
- 125W TDP is a space heater by today's standards
- Single thread performance is a weak spot, bottom third of our data
- DDR3 memory only, no upgrade path
- Efficiency score of 31 is one of the worst we've seen
Opinión de los propietarios
The Word on the Street
Las pruebas
Performance
What surprised us is how the 3.2GHz base and 3.6GHz boost still feel snappy for basic desktop work, especially with that unlocked multiplier begging for a 4GHz overclock. But the numbers don't lie. PassMark multi sits at 3842, which lands in the bottom third of our database, and single thread at 1452 is even rougher. Six cores help with older multithreaded tasks, but modern software wants more per-core punch.
Specifications
Full Specifications
Processor
| Brand | AMD |
| Series | Phenom II X6 |
| Model | 1090T |
| Codename | Thuban |
| Class | desktop |
| Process | 45 |
Cores & Clocks
| Cores | 6 |
| Threads | 6 |
| Base Clock | 3200 |
| Boost Clock | 3600 |
Cache
| L2 Cache | 3 |
| L3 Cache | 6 MB |
Performance
| PassMark Multi | 3842 |
| PassMark Single | 1452 |
Memory
| Memory Type | DDR3 |
| Max Speed | 1333 |
| Channels | 2 |
Platform & Power
| Socket | AM3 |
| TDP | 125 |
| Unlocked | Yes |
vs Competition
Against something like the Intel Core Ultra 7 265KF, this Phenom is not even in the same conversation, the Ultra 7 is a modern monster with efficiency and single thread numbers that embarrass the 1090T. The Dell Xeon E5-2637 V2 and PC Server and Parts E5-2697 v2 are old server chips that at least offer more cores and better multithreaded throughput for similar used prices, though they need different boards. The be quiet! Ryzen 3 Dark Rock Pro 5 is a cooler, not a CPU, so that's a weird comparison, but it tells you how old this product category is.
| Spec | AMD Phenom II X6 1090T | Intel Core Ultra 9 285K | SMC EPYC 9555P | HP Xeon 6526Y | CG CHIPS GATE EPYC 6GK7443-1EX30-0XE0 1PC New 6GK7443-1EX30-0XE0 Communications Processor | MICRO CENTER 9950X3DMAGX870ETMKWF |
|---|---|---|---|---|---|---|
| Cores | 6 | 24 | 64 | 16 | 24 | - |
| Threads | 6 | 24 | 128 | 32 | 48 | - |
| Boost Clock Mhz | 3600 | 5700 | 4400 | 3900 | 4000 | - |
| L3 Cache Mb | 6 | 36 | 256 | 37 | 128 | - |
| Tdp W | 125 | 125 | 360 | 195 | 200 | - |
| Socket | AM3 | LGA 1851 | AMD Socket SP5 | LGA 4677 | AMD Socket SP3 | - |
| Integrated Graphics | - | Intel Graphics | - | No | - | - |
| Compare | Compare | Compare | Compare | Compare |
| Producto | AI | Feature | Platform | Efficiency | Multi Thread | Valoración social | Affordability | Single Thread |
|---|---|---|---|---|---|---|---|---|
| AMD Phenom II X6 1090T | 32.9 | 75.1 | 54.2 | 30.6 | 35.6 | 78 | 54.2 | 31.5 |
| Intel Core Ultra 9 285K Compare | 96.2 | 99.9 | 96 | 97.2 | 96.4 | 90.3 | 18.3 | 99.9 |
| SMC EPYC 9555P Compare | 99.3 | 77.5 | 96.8 | 89.7 | 99.4 | 0 | 0.4 | 85.9 |
| HP Xeon 6526Y Compare | 92.1 | 77.5 | 90.7 | 79.3 | 90 | 0 | 2.7 | 80.6 |
| CG CHIPS GATE EPYC 6GK7443-1EX30-0XE0 1PC New 6GK7443-1EX30-0XE0 Communications Processor Compare | 94.8 | 77.5 | 84.4 | 85.2 | 93.9 | 36.3 | 5.3 | 80.5 |
| MICRO CENTER 9950X3DMAGX870ETMKWF Compare | 85.8 | 20.7 | 17.4 | 66.7 | 97.1 | 0 | 6.4 | 98.4 |
Precio
Value & Pricing
Used prices swing wildly, from USD 180 to USD 293 in the US and CAD 100 to CAD 570 in Canada, so shop carefully. The cheapest US listing is the one to grab if you must, but honestly, even at the low end you're paying collector tax for a chip that gets smoked by a modern budget CPU. If you already own an AM3 board and need a drop-in upgrade, fine. Otherwise, save your money.
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Overview
The Phenom II X6 1090T is a legend from a different era, and it still has a pulse if you know what you're getting into. This is a six-core Thuban chip from 2010, unlocked and hungry at 125W, and it was AMD's answer to Intel's quad-core dominance back then. The one thing to know: it's a nostalgia buy or a cheap upgrade for an old AM3 board, not a modern performer.
Common Questions
Q: Can I overclock the Phenom II X6 1090T?
Yes, and you should. The Black Edition has an unlocked multiplier, so hitting 4GHz is realistic with a decent cooler. Just don't expect modern single thread scores even then.
Q: Is this CPU good for gaming in 2025?
Not really. The single thread score of 1452 is a bottleneck for modern games. It'll run older titles fine, but anything recent will stutter.
Q: What motherboard do I need?
You need an AM3 socket board with a BIOS that supports Thuban six-core chips. Some AM2+ boards can work with a BIOS update, but check your board's CPU support list first.
Who Should Skip This
If you're looking for a cheap modern CPU for gaming or productivity, this isn't it. Go grab a used Ryzen 3 or even a newer Intel i3 instead, you'll get way better single thread performance and a fraction of the power draw.
Verdict
Buy the Phenom II X6 1090T only if you're resurrecting an old AM3 system or you're a collector who wants a piece of AMD history. For anyone building or upgrading a daily driver in 2025, this chip is a hard pass. The unlocked multiplier is fun, but the 125W power draw and ancient platform make it a hobby project, not a practical purchase.
