AMD Phenom II X4 840

older Released January, 2011

3.2 GHz
Quad core

5.3 Out of 10 CPUBoss Score		When I got to 4 Ghz at 1.3875 Vcore I was pretty satisfied. by dstoler (Nov, 2011) I am VERY satisfied with this little budget quadcore and By overclocking it 1.1ghz over stock frequencies I think I got my money's worth. by dstoler (Nov, 2011)

	Performance
	Benchmark performance using all cores
Phenom II X4 840 5.3 FX 6300 6.0 Athlon X4 860K 5.7
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

	Single-core Performance
	Individual core benchmark performance
Phenom II X4 840 4.5 FX 6300 5.6 Athlon X4 860K 6.2
PassMark (Single Core), Geekbench 3 Single Core and 1 more

	Integrated Graphics
	Integrated GPU performance for graphics
Phenom II X4 840 0.0 FX 6300 0.0 Athlon X4 860K 0.0
Fire Strike

	Integrated Graphics (OpenCL)
	Integrated GPU performance for parallel computing
Phenom II X4 840 0.0 FX 6300 0.0 Athlon X4 860K 0.0
CompuBench 1.5 Bitcoin mining and 4 more

	Performance per Watt
	How efficiently does the processor use electricity?
Phenom II X4 840 5.6 FX 6300 5.9 Athlon X4 860K 5.9
Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

	Value
	Are you paying a premium for performance?
Phenom II X4 840 6.6 FX 6300 6.9 Athlon X4 860K 7.6
Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

5.3	CPUBoss Score
	Combination of all six facets
Phenom II X4 840 5.3 FX 6300 5.7 Athlon X4 860K 5.9

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Phenom II X4 840
5,835

7,871

7,520

GeekBench 3 (Single core) Data courtesy Primate Labs

Phenom II X4 840
1,655

2,478

2,053

GeekBench 3 (AES single core) Data courtesy Primate Labs

Phenom II X4 840
129,500 MB/s

2,290,000 MB/s

2,290,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Phenom II X4 840
5,515

7,447

n.d.

GeekBench (64-bit) Data courtesy Primate Labs

Phenom II X4 840
7,871

8,232

n.d.

GeekBench

Phenom II X4 840
7,871

9,503

n.d.

PassMark Data courtesy Passmark

Phenom II X4 840
5,029

6,444

5,468

PassMark (Single Core)

Phenom II X4 840
1,537

1,446

1,596


	9.4 read review	I was easily able to OC it to 3.7ghz on my Cooler Master V6GT on 1.35Vcore.

Socket Type

I installed the chip in my ASRock 990fx Am3+ board with a H100 cpu water cooler and it ran like a charm.

by dstoler (Nov, 2011)

If I jumped it to 1.4-1.45 I could probably get 3.8/4ghz outta this thing, but I don't want to risk frying it.

by snipekill2445 (May, 2012)

Temps were only 50c 3 hours of blend testing in Prime95.

by dstoler (Nov, 2011)

Socket

I tried to go to 4.1 Ghz and hit a wall in the voltages.

by dstoler (Nov, 2011)

I only use my system for gaming, paired with 6GB of 1500mhz ram and a HD 6950 and I can max out almost all games like Skyrim, BFBC2 and MW3.

by snipekill2445 (May, 2012)

I did need to OC it to 3.6ghz to solve my GPU bottleneck though.

by snipekill2445 (May, 2012)

Overclocking

I wanted to get the most for my money so I researched ALOT on OCN and other sites about how to overclock.

by dstoler (Nov, 2011)

I have had 2 of these chips now (sold one) and have yet to see a 24/7 overclock of this cpu higher than mine.

by dstoler (Nov, 2011)

Multicore

That fact that it is a quad-core for such a low price is incredible.

by snipekill2445 (May, 2012)

Cooling

With proper Board and cooling it overclocks awesome!

by dstoler (Nov, 2011)

summary

Clock speed	3.2 GHz
Turbo clock speed	0 GHz
Cores	Quad core
Socket type	AM3
Is unlocked	No

features

Has a NX bit	Yes
Has virtualization support	Yes
Instruction set extensions	SSE4a 3DNow! SSE2 SSE MMX SSE3
Supports dynamic frequency scaling	Yes

integrated graphics

GPU	None
Label	None
Latest DirectX	None
Number of displays supported	None
GPU clock speed	None
Turbo clock speed	None
3DMark06	None

bus

Clock speed	2,000 MHz

details

Architecture	x86-64
Threads	4 threads
L2 cache	2 MB
L2 cache per core	0.5 MB/core
L3 cache	0 MB
L3 cache per core	0 MB/core
Manufacture process	45 nm
Max CPUs	1
Voltage range	0.85 - 1.4V
Operating temperature	Unknown - 71°C

overclocking

Overclock popularity	37
Overclock review score	5
Overclocked clock speed	3.92 GHz
Overclocked clock speed (Water)	3.1 GHz
PassMark (Overclocked)	1,971.6
Overclocked clock speed (Air)	3.92 GHz

power consumption

TDP	95W
Annual home energy cost	22.89 $/year
Annual commercial energy cost	83.22 $/year
Performance per watt	1.88 pt/W
Typical power consumption	77.19W

memory controller

Memory controller	Built-in
Memory type	DDR3

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