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Core 2 Quad Q6700 vs Pentium D 820


Description
The Q6700 is based on Core architecture while the 820 is based on NetBurst.

Using the multithread performance as a reference, the Q6700 gets a score of 19.8 k points while the 820 gets 14.1 k points.

Summarizing, the Q6700 is 1.4 times faster than the 820. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
6fb
f44
Core
Kentsfield
Smithfield
Architecture
Base frecuency
2.666 GHz
2.8 GHz
Socket
LGA 775
LGA 775
Cores/Threads
4/4
2/2
TDP
95 W
130 W
Cache L1 (d+i)
4x32+4x32 kB
16+8 kB
Cache L2
8192 kB
2048 kB
Cache L3
kB
0 kB
Date
April 2007
May 2005
Mean monothread perf.
10.05k points
7.45k points
Mean multithread perf.
19.77k points
14.07k 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
Q6700
820
Test#1 (Integers)
3.06k
1.93k (x0.63)
Test#2 (FP)
2.74k
3.11k (x1.14)
Test#3 (Generic, ZIP)
2.56k
1.49k (x0.58)
Test#1 (Memory)
1.68k
0.91k (x0.54)
TOTAL
10.05k
7.45k (x0.74)

Multithread

Q6700

820
Test#1 (Integers)
7.28k
3.92k (x0.54)
Test#2 (FP)
5.83k
6.23k (x1.07)
Test#3 (Generic, ZIP)
5.13k
2.99k (x0.58)
Test#1 (Memory)
1.53k
0.94k (x0.61)
TOTAL
19.77k
14.07k (x0.71)

Performance/W
Q6700
820
Test#1 (Integers)
77 points/W
30 points/W
Test#2 (FP)
61 points/W
48 points/W
Test#3 (Generic, ZIP)
54 points/W
23 points/W
Test#1 (Memory)
16 points/W
7 points/W
TOTAL
208 points/W
108 points/W

Performance/GHz
Q6700
820
Test#1 (Integers)
1146 points/GHz
690 points/GHz
Test#2 (FP)
1029 points/GHz
1112 points/GHz
Test#3 (Generic, ZIP)
962 points/GHz
534 points/GHz
Test#1 (Memory)
632 points/GHz
324 points/GHz
TOTAL
3768 points/GHz
2660 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