AMD Phenom II X4 840 - HDX840WFK42GM / HDX840WFGMBOX
Specifications
Tools
AMD Phenom II X4 840 specifications
| General information | |
| Type | CPU / Microprocessor |
| Market segment | Desktop |
| Family | AMD Phenom II X4 |
| Model number ? | 840 |
| CPU part numbers | HDX840WFK42GM is an OEM/tray microprocessor HDX840WFGMBOX is a boxed microprocessor |
| Stepping codes | AADIC AD NADIC AD |
| Frequency ? | 3200 MHz |
| Bus speed ? | 667 MHz Memory controller One 2000 MHz 16-bit HyperTransport link |
| Clock multiplier ? | 16 |
| Package | 938-pin organic micro-PGA |
| Sockets | Socket AM2+ Socket AM3 |
| Weight | 1.4oz / 39.2g (CPU) 12.5oz / 353.6g (box) |
| Fan/heatsink | DK8-7G52C-A1-GP |
| Introduction date | Jan 4, 2011 |
| Architecture / Microarchitecture | |
| Microarchitecture | K10 |
| Platform | Dragon |
| Core stepping ? | C3 |
| CPUID | 100F43 |
| Manufacturing process | 0.045 micron SOI |
| Die size | 258mm2 |
| Data width | 64 bit |
| The number of cores | 4 |
| The number of threads | 4 |
| Floating Point Unit | Integrated |
| Level 1 cache size ? | 4 x 64 KB 2-way associative instruction caches 4 x 64 KB 2-way associative data caches |
| Level 2 cache size ? | 4 x 512 KB 16-way associative caches |
| Level 3 cache size | None |
| Virtual memory | 256 TB |
| Multiprocessing | Uniprocessor |
| Features |
|
| Low power features |
|
| On-chip peripherals |
|
| Electrical / Thermal parameters | |
| V core ? | 0.85V - 1.4V |
| Maximum operating temperature ? | 71°C |
| Thermal Design Power ? | 95 Watt |
CPUs, related to AMD Phenom II X4 840
| Model | Cores / Threads |
Freq. | Turbo freq. |
L2 cache |
L3 cache |
TDP | Features | Price |
|---|---|---|---|---|---|---|---|---|
| AMD Phenom II X4 family, Socket AM2+ / Socket AM3 | ||||||||
| Phenom II X4 840 | 4 / 4 | 3.2 GHz | 2 MB | 95 Watt | ||||
| Phenom II X4 955 (125W, rev. C3) | 4 / 4 | 3.2 GHz | 2 MB | 6 MB | 125 Watt | |||
| Phenom II X4 955 (95W, rev. C3, non-BE) | 4 / 4 | 3.2 GHz | 2 MB | 6 MB | 95 Watt | |||
| Phenom II X4 B97 | 4 / 4 | 3.2 GHz | 2 MB | 6 MB | 95 Watt | |||
| Phenom II X4 955 (125W, rev. C2, BE) | 4 / 4 | 3.2 GHz | 2 MB | 6 MB | 125 Watt | Unlock | ||
| Phenom II X4 955 (125W, rev. C3, BE) | 4 / 4 | 3.2 GHz | 2 MB | 6 MB | 125 Watt | Unlock | ||
| Phenom II X4 960T | 4 / 4 | 3 GHz | 3.4 GHz | 2 MB | 6 MB | 95 Watt | TBT, Unlock | |
| Phenom II X4 B99 | 4 / 4 | 3.3 GHz | 2 MB | 6 MB | 95 Watt | |||
| Phenom II X4 965 (125W, non-BE) | 4 / 4 | 3.4 GHz | 2 MB | 6 MB | 125 Watt | |||
| Phenom II X4 965 (140W, BE) | 4 / 4 | 3.4 GHz | 2 MB | 6 MB | 140 Watt | Unlock | $81 | |
| Phenom II X4 965 (125W, BE) | 4 / 4 | 3.4 GHz | 2 MB | 6 MB | 125 Watt | Unlock | ||
| Phenom II X4 970 (rev. C3) | 4 / 4 | 3.5 GHz | 2 MB | 6 MB | 125 Watt | Unlock | $142 | |
| Phenom II X4 970 (rev. E0) | 4 / 4 | 3.5 GHz | 2 MB | 6 MB | 125 Watt | Unlock | ||
| Phenom II X4 975 | 4 / 4 | 3.6 GHz | 2 MB | 6 MB | 125 Watt | Unlock | $153 | |
| Phenom II X4 980 | 4 / 4 | 3.7 GHz | 2 MB | 6 MB | 125 Watt | Unlock | $163 | |
| AMD Phenom II X4 family, K10 micro-architecture, Other sockets | ||||||||
| Phenom II X4 920 | 4 / 4 | 2.8 GHz | 2 MB | 6 MB | 140.8 Watt | |||
| Phenom II X4 940 | 4 / 4 | 3 GHz | 2 MB | 6 MB | 139.6 Watt | Unlock | ||
| Other families, K10 micro-architecture, Socket AM2+ / Socket AM3 | ||||||||
| Athlon II 170u | 1 / 1 | 2 GHz | 1 MB | 20 Watt | ||||
| Athlon X2 5200+ (0.045 micron) | 2 / 2 | 2.3 GHz | 1 MB | 65 Watt | ||||
| Sempron X2 190 | 2 / 2 | 2.5 GHz | 1 MB | 45 Watt | ||||
| Athlon II X2 280 | 2 / 2 | 3.6 GHz | 2 MB | 65 Watt | $49 | |||
| Phenom II X2 570 BE | 2 / 2 | 3.5 GHz | 1 MB | 6 MB | 80 Watt | Unlock | ||
| Phenom II X3 B77 | 3 / 3 | 3.2 GHz | 1.5 MB | 6 MB | 95 Watt | |||
| Athlon II X3 460 | 3 / 3 | 3.4 GHz | 1.5 MB | 95 Watt | $69 | |||
• Highlighted numbers and features indicate whether specific processor performs better or worse than Phenom II X4 840
• Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)
• The 'Price' column shows official AMD prices as of Jun 4, 2013. Prices for obsolete and tray-only processors are not provided.
• List of related CPUs is not complete.
• Features abbreviations:
Unlock - Unlocked multiplier
FAQ
AMD Phenom II X4 840 Overclocking
Sorry, overclocking information is not available at this time.
Pictures (4)
Back view |
 |
Side view. The box comes with AVG Anti-virus 6-month trial, which is included on a mini-CD inside of the box. |
 |
 | |
| Phenom II X4 840 box pictures | |
Front view. |
 |
News
Benchmarks
Benchmark tools
- For additional benchmarks, comparing multi-threaded performance of this microprocessor with other Phenom II X4 CPUs and the fastest AMD and Intel x86 chips, please visit AMD Phenom II X4 840 benchmarks page.
AMD Phenom II X4 840 benchmarks
The graphs below show up to 10 processors with aproximately the same level of performance in different types of applications. All processors were tested at nominal frequency (not overclocked), with stock heatsink and default BIOS settings. To see how the Phenom II X4 840 compares to other CPUs please see benchmark tools section above.
Benchmarked processor
| CPU ID: | 100F53 |
| CPU vendor string: | AuthenticAMD |
| CPU name string: | AMD Phenom(tm) II X4 840 Processor |
Integer performance
| Part number | Result | |
|---|---|---|
| 100.3% | ||
| 100.3% | ||
| 100.3% | ||
| 100.2% | ||
| 100.2% | ||
| 100% | ||
| 97.5% | ||
| 97.3% | ||
| 97.1% | ||
| 94.2% | ||
| 94% |
Floating Point performance
| Part number | Result | |
|---|---|---|
| 103.7% | ||
| 100.7% | ||
| 100.5% | ||
| 100.5% | ||
| 100.4% | ||
| 100% | ||
| 99.5% | ||
| 99.2% | ||
| 97.5% | ||
| 97% | ||
| 96.7% |
MMX / SSE / SSE2 performance
| Part number | Result | |
|---|---|---|
| 101.4% | ||
| 101.3% | ||
| 101.2% | ||
| 100.8% | ||
| 100.1% | ||
| 100% | ||
| 99.3% | ||
| 99.3% | ||
| 97.9% | ||
| 97.7% | ||
| 97.6% |
Memory-intensive program performance
| Part number | Result | |
|---|---|---|
| 104.2% | ||
| 104.1% | ||
| 102.8% | ||
| 102.3% | ||
| 100% | ||
| 100% | ||
| 99.9% | ||
| 99.3% | ||
| 99.2% | ||
| 98.8% | ||
| 98.3% |
CPU ID (8)
CPUID Tools
- Our CPUID database contains 8 records for this microprocessor. See all submitted records.
- Use our CPU identification tool to check features of your CPU.
CPUID features of Phenom II X4 840
NOTE: The CPU ID information below was taken from one CPU and may include features that are not present in all different steppings of the AMD Phenom II X4 840 CPU.
|
|
| General information | |
|---|---|
| Vendor: | AuthenticAMD |
| Processor name (BIOS): | AMD Phenom(tm) II X4 840 Processor |
| Cores: | 4 |
| Logical processors: | 4 |
| Processor type: | Original OEM Processor |
| Core stepping: | BL-C3 |
| CPUID signature: | 100F53 |
| Family: | 16 (010h) |
| Model: | 5 (05h) |
| Stepping: | 3 (03h) |
| Cache: | L1 data | L1 instruction | L2 |
|---|---|---|---|
| Size: | 4 x 64 KB | 4 x 64 KB | 4 x 512 KB |
| Associativity: | 2-way set associative |
2-way set associative |
16-way set associative |
| Line size: | 64 bytes | 64 bytes | 64 bytes |
| Lines per tag: | 1 | 1 | 1 |
| Instruction set extensions | Additional instructions | ||
|---|---|---|---|
| MMX | Advanced Bit manipulation | ||
| AMD extensions to MMX | CLFLUSH | ||
| 3DNow! | CMOV | ||
| Extensions to 3DNow! | CMPXCHG16B | ||
| SSE | CMPXCHG8B | ||
| SSE2 | FXSAVE/FXRSTORE | ||
| SSE3 | MONITOR/MWAIT | ||
| SSE4A | POPCNT | ||
| PREFETCH/PREFETCHW | |||
| RDTSCP | |||
| SKINIT / STGI support | |||
| SYSCALL/SYSRET | |||
| SYSENTER/SYSEXIT | |||
| Major features | Other features | ||
| On-chip Floating Point Unit | 1 GB large page support | ||
| 64-bit / Intel 64 | 100MHz multiplier control | ||
| NX bit/XD-bit | 128-bit SSE instructions | ||
| Secure Virtual Machine (Virtualization) | 36-bit page-size extensions | ||
| PowerNow! / Cool'n'Quiet | Advanced programmable interrupt controller | ||
| Core multi-processing legacy mode | |||
| Debugging extensions | |||
| Extended APIC space | |||
| Hardware P-state control | |||
| Hardware thermal control | |||
| Instruction based sampling | |||
| LAHF / SAHF support in 64-bit mode | |||
| LBR virtualization | |||
| LOCK MOV CR0 means MOV CR8 | |||
| Machine check architecture | |||
| Machine check exception | |||
| Memory-type range registers | |||
| Misaligned SSE mode | |||
| Model-specific registers | |||
| Nested page tables | |||
| OS visible workaround | |||
| Page attribute table | |||
| Page global extension | |||
| Page-size extensions (4MB pages) | |||
| Physical address extensions | |||
| SVM lock | |||
| Software thermal control | |||
| Support for NRIP save | |||
| THERMTRIP | |||
| TSC rate is ensured to be invariant across all states | |||
| Temperature sensor | |||
| Time stamp counter | |||
| Virtual 8086-mode enhancements | |||
| Watchdog timer support | |||
Comments (9)
You're welcome to post suggestions, corrections, your own personal AMD Phenom II X4 840 review, or your experience with the microprocessor. Please do not ask upgrade and troubleshooting questions, and do not start discussions.
Phenom In Name Alone
It's actually not a Phenom, and it doesn't use the Deneb core. Its a quad-core Athlon using the Propus die and has the same amount of L3 cache as the other Athlons: 0 MB. It is, through and through, an Athlon.
Beraid in doubt alone
Chip binning requires parts to be at least functional at some levels. AMD wouldn't have named it Phenom unless the part actually has L3 on die but is disabled because it doesn't work.
Fair
True, but that's just lasered text and programming... the actual stepping isn't baked in the core itself. I was more inclined to think that the 840, since they are for OEM's only, are just Denebs with defect L3. Until you physically take a look at the core, anyone can just speculate. However I find it strange that AMD would ignore the main difference that sets apart Phenoms from Athlons.
X4 840 is a strange bird
i just took one back to retailer. the on-chip temp sensors read 8c at idle and 29c with 90% load on all cores. reported wattage put the chip at 107.4 watts. not 95 watt range. the minimum TDP in win7 was 33.6 watts. 2 different programs gave me the same results in an Asus and a Gigabyte m/b with different chipsets.
the bios temps from the m/b's were both around 21c.
i don't know what is in this cpu and i don't have any idea as to it's longevity. installed an athlon II x4 640 instead of this.
NOT A Phenom
This has no level 3 cache.
This is a high end Athlon II X4.
There goes AMD misleading is customers. :/
I am disappointed with AMD.
complaints about phenom II X4 840
AMD dubbed this a Phenom because it performs better than half of all the other phenoms with L3 up until the 955. If you want L3 Cache pay the extra $30 for the minimal performance increase with the 955. I don't understand why people get so upset with AMD over this. If you had a car that was called a Ferarri, looked like a Ferarri, sounded like a Ferarri, and was just as fast as a Ferarri, but had a different engine and was less expensive.... would you complain?
Its neither a Propus or Deneb, Its a Thuban core with a faulty L3 and locked cores. The 840T is exaclty the same but with a L3. Both can unlock 5th and 6th cores, but only the 840T can have a L3.
PHENOM II X4 840 HAVE L3 CACHE, I UNLOCK IT
I have Phenom II X4 840, and before unlocking it, cpu-z shows it's a Propus core with no L3 cache. Then I unlock it (using ASUS M5A87 board and asus core unlocker function in bios) and then cpu-z shows it's a Deneb core with 6Mb of L3 cache. I test it and it's stable 100%. So, this is basicaly Phenom II X4 955 with disabled L3 cache and locked multiplier....
| Terms and Conditions · Privacy Policy · Contact Us | (c) Copyright 2003 - 2010 Gennadiy Shvets |
