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Core i7-930 vs Core 2 Duo P8400


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

Using the multithread performance as a reference, the i7-930 gets a score of 69.4 k points while the P8400 gets 21 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
106a5
10676
Core
Bloomfield
Peryn-3M
Architecture
Base frecuency
2.8 GHz
2.267 GHz
Boost frecuency
3.067 GHz
2.267 GHz
Socket
LGA 1366
Socket P
Cores/Threads
4/8
2/2
TDP
130 W
25 W
Cache L1 (d+i)
32+32 kB
2x32 kB
Cache L2
256 kB
3072 kB
Cache L3
8192 kB
0 kB
Date
February 2010
July 2008

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
i7-930
P8400
Test#1 (Integers)
1941
1779 (-8.34%)
Test#2 (FP)
4384
4949 (12.90%)
Test#3 (Generic, ZIP)
2638
2078 (-21.25%)
Test#1 (Memory)
2408
1438 (-40.29%)
TOTAL
11371
10244 (-9.91%)

Multithread

i7-930

P8400
Test#1 (Integers)
7305
3527 (-51.71%)
Test#2 (FP)
19361
9750 (-49.64%)
Test#3 (Generic, ZIP)
13429
4071 (-69.69%)
Test#1 (Memory)
2011
1439 (-28.46%)
TOTAL
42106
18787 (-55.38%)

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
i7-930
P8400
Test#1 (Integers)
7276
2428 (-66.63%)
Test#2 (FP)
4819
5402 (12.11%)
Test#3 (Generic, ZIP)
2862
2128 (-25.67%)
Test#1 (Memory)
2623
1426 (-45.63%)
TOTAL
17580
11384 (-35.24%)

Multithread

i7-930

P8400
Test#1 (Integers)
28092
4813 (-82.87%)
Test#2 (FP)
21624
10581 (-51.07%)
Test#3 (Generic, ZIP)
14826
4176 (-71.83%)
Test#1 (Memory)
4851
1449 (-70.13%)
TOTAL
69393
21019 (-69.71%)

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

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


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. 3.7.8