Pentium G645 vs Xeon E5645
Description
The G645 is based on Sandy Bridge architecture while the E5645 is based on Westmere.
Using the multithread performance as a reference, the G645 gets a score of 35.4 k points while the E5645 gets 77 k points.
Summarizing, the E5645 is 2.2 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 E5645 gets 77 k points.
Summarizing, the E5645 is 2.2 times faster than the G645 . To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
206a7
206c2
Core
Sandy Bridge
Westmere-EP
Base frecuency
2.9 GHz
2.4 GHz
Boost frecuency
2.9 GHz
2.8 GHz
Socket
LGA 1155
LGA 1366
Cores/Threads
2/2
6 /6
TDP
65 W
80 W
Cache L1 (d+i)
2x32+2x32 kB
64 kB
Cache L2
2x256 kB
256 kB
Cache L3
3072 kB
12288 kB
Date
September 2012
March 2010
Mean monothread perf.
22.24k points
15.64k points
Mean multithread perf.
35.38k points
76.96k 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
E5645
Test#1 (Integers)
8.66k
6.47k (x0.75)
Test#2 (FP)
6.9k
4.4k (x0.64)
Test#3 (Generic, ZIP)
3.48k
2.43k (x0.7)
Test#1 (Memory)
3.2k
2.33k (x0.73)
TOTAL
22.24k
15.64k (x0.7)
Multithread
G645
E5645
Test#1 (Integers)
14.06k
34.43k (x2.45)
Test#2 (FP)
11.82k
24.23k (x2.05)
Test#3 (Generic, ZIP)
5.83k
14.48k (x2.49)
Test#1 (Memory)
3.69k
3.81k (x1.03)
TOTAL
35.38k
76.96k (x2.17)
Performance/W
G645
E5645
Test#1 (Integers)
216 points/W
430 points/W
Test#2 (FP)
182 points/W
303 points/W
Test#3 (Generic, ZIP)
90 points/W
181 points/W
Test#1 (Memory)
57 points/W
48 points/W
TOTAL
544 points/W
962 points/W
Performance/GHz
G645
E5645
Test#1 (Integers)
2987 points/GHz
2311 points/GHz
Test#2 (FP)
2380 points/GHz
1573 points/GHz
Test#3 (Generic, ZIP)
1199 points/GHz
867 points/GHz
Test#1 (Memory)
1103 points/GHz
833 points/GHz
TOTAL
7669 points/GHz
5584 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