Core i7-870 vs Core 2 Duo P8400
Description
The i7-870 is based on Nehalem architecture while the P8400 is based on Core.
Using the multithread performance as a reference, the i7-870 gets a score of 42.5 k points while the P8400 gets 21 k points.
Summarizing, the i7-870 is 2 times faster than the P8400. To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-870 gets a score of 42.5 k points while the P8400 gets 21 k points.
Summarizing, the i7-870 is 2 times faster than the P8400. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
106e5
10676
Core
Lynnfield
Peryn-3M
Base frecuency
2.933 GHz
2.267 GHz
Boost frecuency
3.6 GHz
2.267 GHz
Socket
LGA 1156
Socket P
Cores/Threads
4/8
2/2
TDP
95 W
25 W
Cache L1 (d+i)
4x32+4x32 kB
2x32 kB
Cache L2
4x256 kB
3072 kB
Cache L3
8192 kB
0 kB
Date
September 2009
July 2008
Mean monothread perf.
15.44k points
11.38k points
Mean multithread perf.
42.53k points
21.02k 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
i7-870
P8400
Test#1 (Integers)
1.98k
1.78k (x0.9)
Test#2 (FP)
4.36k
4.95k (x1.14)
Test#3 (Generic, ZIP)
2.24k
2.08k (x0.93)
Test#1 (Memory)
2.72k
1.44k (x0.53)
TOTAL
11.3k
10.24k (x0.91)
Multithread
i7-870
P8400
Test#1 (Integers)
4.46k
3.53k (x0.79)
Test#2 (FP)
13.95k
9.75k (x0.7)
Test#3 (Generic, ZIP)
7.54k
4.07k (x0.54)
Test#1 (Memory)
1.7k
1.44k (x0.85)
TOTAL
27.65k
18.79k (x0.68)
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
i7-870
P8400
Test#1 (Integers)
5.86k
2.43k (x0.41)
Test#2 (FP)
4.53k
5.4k (x1.19)
Test#3 (Generic, ZIP)
2.36k
2.13k (x0.9)
Test#1 (Memory)
2.69k
1.43k (x0.53)
TOTAL
15.44k
11.38k (x0.74)
Multithread
i7-870
P8400
Test#1 (Integers)
17.53k
4.81k (x0.27)
Test#2 (FP)
13.65k
10.58k (x0.78)
Test#3 (Generic, ZIP)
7.93k
4.18k (x0.53)
Test#1 (Memory)
3.41k
1.45k (x0.42)
TOTAL
42.53k
21.02k (x0.49)
Performance/W
i7-870
P8400
Test#1 (Integers)
185 points/W
193 points/W
Test#2 (FP)
144 points/W
423 points/W
Test#3 (Generic, ZIP)
83 points/W
167 points/W
Test#1 (Memory)
36 points/W
58 points/W
TOTAL
448 points/W
841 points/W
Performance/GHz
i7-870
P8400
Test#1 (Integers)
1629 points/GHz
1071 points/GHz
Test#2 (FP)
1257 points/GHz
2383 points/GHz
Test#3 (Generic, ZIP)
655 points/GHz
938 points/GHz
Test#1 (Memory)
748 points/GHz
629 points/GHz
TOTAL
4289 points/GHz
5022 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4