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Core i7-2600K vs FX 8120


Description
The i7-2600K is based on Sandy Bridge architecture while the 8120 is based on Bulldozer.

Using the multithread performance as a reference, the i7-2600K gets a score of 106.9 k points while the 8120 gets 70.8 k points.

Summarizing, the i7-2600K is 1.5 times faster than the 8120. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
206a7
600f12
Core
Sandy Bridge
Zambezi
Architecture
Base frecuency
3.4 GHz
3.1 GHz
Boost frecuency
3.8 GHz
4 GHz
Socket
LGA 1155
Socket AM3+
Cores/Threads
4/8
8/8
TDP
95 W
125 W
Cache L1 (d+i)
4x32+4x32 kB
4x64+8x16 kB
Cache L2
4x256 kB
4x2048 kB
Cache L3
8192 kB
8192 kB
Date
June 2011
October 2011
Mean monothread perf.
27.38k points
23.5k points
Mean multithread perf.
106.85k points
70.78k points

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i7-2600K
8120
Test#1 (Integers)
9.61k
9.31k (x0.97)
Test#2 (FP)
8.51k
6.85k (x0.81)
Test#3 (Generic, ZIP)
4.2k
2.77k (x0.66)
Test#1 (Memory)
5.06k
4.58k (x0.9)
TOTAL
27.38k
23.5k (x0.86)

Multithread

i7-2600K

8120
Test#1 (Integers)
42.23k
25.84k (x0.61)
Test#2 (FP)
40.09k
28.49k (x0.71)
Test#3 (Generic, ZIP)
19.97k
13.84k (x0.69)
Test#1 (Memory)
4.57k
2.61k (x0.57)
TOTAL
106.85k
70.78k (x0.66)

Performance/W
i7-2600K
8120
Test#1 (Integers)
444 points/W
207 points/W
Test#2 (FP)
422 points/W
228 points/W
Test#3 (Generic, ZIP)
210 points/W
111 points/W
Test#1 (Memory)
48 points/W
21 points/W
TOTAL
1125 points/W
566 points/W

Performance/GHz
i7-2600K
8120
Test#1 (Integers)
2528 points/GHz
2327 points/GHz
Test#2 (FP)
2238 points/GHz
1712 points/GHz
Test#3 (Generic, ZIP)
1105 points/GHz
693 points/GHz
Test#1 (Memory)
1333 points/GHz
1144 points/GHz
TOTAL
7204 points/GHz
5876 points/GHz

Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.

Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.

If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.11.4