Pentium G645 vs Core 2 Quad Q8400
Description
The G645 is based on Sandy Bridge architecture while the Q8400 is based on Core.
Using the multithread performance as a reference, the G645 gets a score of 35.4 k points while the Q8400 gets 51.9 k points.
Summarizing, the Q8400 is 1.5 times faster than the G645 . To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the G645 gets a score of 35.4 k points while the Q8400 gets 51.9 k points.
Summarizing, the Q8400 is 1.5 times faster than the G645 . To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
206a7
1067a
Core
Sandy Bridge
Yorkfield
Base frecuency
2.9 GHz
2.666 GHz
Socket
LGA 1155
LGA 775
Cores/Threads
2/2
4/4
TDP
65 W
95 W
Cache L1 (d+i)
2x32+2x32 kB
128+128 kB
Cache L2
2x256 kB
4096 kB
Cache L3
3072 kB
0 kB
Date
September 2012
April 2009
Mean monothread perf.
22.24k points
14.04k points
Mean multithread perf.
35.38k points
51.92k 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
G645
Q8400
Test#1 (Integers)
8.66k
3.08k (x0.36)
Test#2 (FP)
6.9k
6.8k (x0.99)
Test#3 (Generic, ZIP)
3.48k
2.73k (x0.79)
Test#1 (Memory)
3.2k
1.42k (x0.44)
TOTAL
22.24k
14.04k (x0.63)
Multithread
G645
Q8400
Test#1 (Integers)
14.06k
12.25k (x0.87)
Test#2 (FP)
11.82k
26.84k (x2.27)
Test#3 (Generic, ZIP)
5.83k
10.82k (x1.86)
Test#1 (Memory)
3.69k
2.02k (x0.55)
TOTAL
35.38k
51.92k (x1.47)
Performance/W
G645
Q8400
Test#1 (Integers)
216 points/W
129 points/W
Test#2 (FP)
182 points/W
283 points/W
Test#3 (Generic, ZIP)
90 points/W
114 points/W
Test#1 (Memory)
57 points/W
21 points/W
TOTAL
544 points/W
547 points/W
Performance/GHz
G645
Q8400
Test#1 (Integers)
2987 points/GHz
1157 points/GHz
Test#2 (FP)
2380 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
1199 points/GHz
1025 points/GHz
Test#1 (Memory)
1103 points/GHz
532 points/GHz
TOTAL
7669 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.
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