| | | | | | |

Core 2 Duo P8400 vs Core i7-930


Description
The P8400 is based on Core architecture while the i7-930 is based on Westmere.

Using the multithread performance as a reference, the P8400 gets a score of 21 k points while the i7-930 gets 69.4 k points.

Summarizing, the i7-930 is 3.3 times faster than the P8400. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
10676
106a5
Core
Peryn-3M
Bloomfield
Architecture
Base frecuency
2.267 GHz
2.8 GHz
Boost frecuency
2.267 GHz
3.067 GHz
Socket
Socket P
LGA 1366
Cores/Threads
2/2
4/8
TDP
25 W
130 W
Cache L1 (d+i)
2x32 kB
32+32 kB
Cache L2
3072 kB
256 kB
Cache L3
0 kB
8192 kB
Date
July 2008
February 2010
Mean monothread perf.
11.38k points
17.58k points
Mean multithread perf.
21.02k points
69.39k 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
P8400
i7-930
Test#1 (Integers)
1.78k
1.94k (x1.09)
Test#2 (FP)
4.95k
4.38k (x0.89)
Test#3 (Generic, ZIP)
2.08k
2.64k (x1.27)
Test#1 (Memory)
1.44k
2.41k (x1.67)
TOTAL
10.24k
11.37k (x1.11)

Multithread

P8400

i7-930
Test#1 (Integers)
3.53k
7.3k (x2.07)
Test#2 (FP)
9.75k
19.36k (x1.99)
Test#3 (Generic, ZIP)
4.07k
13.43k (x3.3)
Test#1 (Memory)
1.44k
2.01k (x1.4)
TOTAL
18.79k
42.11k (x2.24)

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
P8400
i7-930
Test#1 (Integers)
2.43k
7.28k (x3)
Test#2 (FP)
5.4k
4.82k (x0.89)
Test#3 (Generic, ZIP)
2.13k
2.86k (x1.35)
Test#1 (Memory)
1.43k
2.62k (x1.84)
TOTAL
11.38k
17.58k (x1.54)

Multithread

P8400

i7-930
Test#1 (Integers)
4.81k
28.09k (x5.84)
Test#2 (FP)
10.58k
21.62k (x2.04)
Test#3 (Generic, ZIP)
4.18k
14.83k (x3.55)
Test#1 (Memory)
1.45k
4.85k (x3.35)
TOTAL
21.02k
69.39k (x3.3)

Performance/W
P8400
i7-930
Test#1 (Integers)
193 points/W
216 points/W
Test#2 (FP)
423 points/W
166 points/W
Test#3 (Generic, ZIP)
167 points/W
114 points/W
Test#1 (Memory)
58 points/W
37 points/W
TOTAL
841 points/W
534 points/W

Performance/GHz
P8400
i7-930
Test#1 (Integers)
1071 points/GHz
2372 points/GHz
Test#2 (FP)
2383 points/GHz
1571 points/GHz
Test#3 (Generic, ZIP)
938 points/GHz
933 points/GHz
Test#1 (Memory)
629 points/GHz
855 points/GHz
TOTAL
5022 points/GHz
5732 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