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Xeon E5-2620 v4 vs Core 2 Quad Q8400


Description
The E5-2620 v4 is based on Broadwell architecture while the Q8400 is based on Core.

Using the multithread performance as a reference, the E5-2620 v4 gets a score of 182.4 k points while the Q8400 gets 51.9 k points.

Summarizing, the E5-2620 v4 is 3.5 times faster than the Q8400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406f1
1067a
Core
Broadwell-EP
Yorkfield
Architecture
Base frecuency
2.1 GHz
2.666 GHz
Boost frecuency
3 GHz
2.666 GHz
Socket
Socket 2011-3
LGA 775
Cores/Threads
8/16
4/4
TDP
85 W
95 W
Cache L1 (d+i)
8x32+8x32 kB
128+128 kB
Cache L2
8x256 kB
4096 kB
Cache L3
20480 kB
0 kB
Date
March 2016
April 2009
Mean monothread perf.
29.39k points
14.04k points
Mean multithread perf.
237.83k points
51.92k points

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
E5-2620 v4
Q8400
Test#1 (Integers)
2.6k
2.44k (x0.94)
Test#2 (FP)
7.55k
6.24k (x0.83)
Test#3 (Generic, ZIP)
2.61k
2.62k (x1)
Test#1 (Memory)
2.03k
1.43k (x0.7)
TOTAL
14.79k
12.73k (x0.86)

Multithread

E5-2620 v4

Q8400
Test#1 (Integers)
17.41k
9.71k (x0.56)
Test#2 (FP)
75.46k
24.81k (x0.33)
Test#3 (Generic, ZIP)
26.25k
10.51k (x0.4)
Test#1 (Memory)
4.65k
2.03k (x0.44)
TOTAL
123.78k
47.05k (x0.38)

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
E5-2620 v4
Q8400
Test#1 (Integers)
8.22k
3.08k (x0.38)
Test#2 (FP)
12.06k
6.8k (x0.56)
Test#3 (Generic, ZIP)
4.01k
2.73k (x0.68)
Test#1 (Memory)
2.89k
1.42k (x0.49)
TOTAL
27.18k
14.04k (x0.52)

Multithread

E5-2620 v4

Q8400
Test#1 (Integers)
61.34k
12.25k (x0.2)
Test#2 (FP)
90.21k
26.84k (x0.3)
Test#3 (Generic, ZIP)
26.2k
10.82k (x0.41)
Test#1 (Memory)
4.62k
2.02k (x0.44)
TOTAL
182.37k
51.92k (x0.28)

Performance/W
E5-2620 v4
Q8400
Test#1 (Integers)
722 points/W
129 points/W
Test#2 (FP)
1061 points/W
283 points/W
Test#3 (Generic, ZIP)
308 points/W
114 points/W
Test#1 (Memory)
54 points/W
21 points/W
TOTAL
2146 points/W
547 points/W

Performance/GHz
E5-2620 v4
Q8400
Test#1 (Integers)
2739 points/GHz
1157 points/GHz
Test#2 (FP)
4021 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
1335 points/GHz
1025 points/GHz
Test#1 (Memory)
963 points/GHz
532 points/GHz
TOTAL
9059 points/GHz
5265 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