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Core i7-950 vs i5-6400


Description
The i7-950 is based on Westmere architecture while the i5-6400 is based on Skylake.

Using the multithread performance as a reference, the i7-950 gets a score of 76.3 k points while the i5-6400 gets 129.5 k points.

Summarizing, the i5-6400 is 1.7 times faster than the i7-950 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
106a5
506e3
Core
Bloomfield
Skylake-S
Architecture
Base frecuency
3.066 GHz
2.7 GHz
Boost frecuency
3.333 GHz
3.3 GHz
Socket
LGA 1366
LGA 1151
Cores/Threads
4/4
4/4
TDP
130 W
65 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
256 kB
4x256 kB
Cache L3
8192 kB
6144 kB
Date
June 2009
September 2015
Mean monothread perf.
19.46k points
48.05k points
Mean multithread perf.
76.29k points
174.05k points

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i7-950
i5-6400
Test#1 (Integers)
8.01k
11.56k (x1.44)
Test#2 (FP)
5.38k
16.53k (x3.07)
Test#3 (Generic, ZIP)
3.11k
4.3k (x1.38)
Test#1 (Memory)
2.96k
3.97k (x1.34)
TOTAL
19.46k
36.36k (x1.87)

Multithread

i7-950

i5-6400
Test#1 (Integers)
31.53k
43.01k (x1.36)
Test#2 (FP)
24.16k
64.46k (x2.67)
Test#3 (Generic, ZIP)
15.84k
16.14k (x1.02)
Test#1 (Memory)
4.75k
5.91k (x1.24)
TOTAL
76.29k
129.51k (x1.7)

Performance/W
i7-950
i5-6400
Test#1 (Integers)
243 points/W
662 points/W
Test#2 (FP)
186 points/W
992 points/W
Test#3 (Generic, ZIP)
122 points/W
248 points/W
Test#1 (Memory)
37 points/W
91 points/W
TOTAL
587 points/W
1992 points/W

Performance/GHz
i7-950
i5-6400
Test#1 (Integers)
2403 points/GHz
3503 points/GHz
Test#2 (FP)
1614 points/GHz
5009 points/GHz
Test#3 (Generic, ZIP)
934 points/GHz
1302 points/GHz
Test#1 (Memory)
888 points/GHz
1203 points/GHz
TOTAL
5839 points/GHz
11018 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