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Pentium D 820 vs 925


Description
Both models 820 and 925 are based on NetBurst architecture.



Using the multithread performance as a reference, the 820 gets a score of 14.1 k points while the 925 gets 14 k points.

Summarizing, the 820 is 1 times faster than the 925. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
f44
f65
Core
Smithfield
Presler
Architecture
Base frecuency
2.8 GHz
3 GHz
Socket
LGA 775
LGA 775
Cores/Threads
2/2
2/2
TDP
130 W
95 W
Cache L1 (d+i)
16+8 kB
16+8 kB
Cache L2
2048 kB
4096 kB
Date
May 2005
October 2006
Mean monothread perf.
7.45k points
7.7k points
Mean multithread perf.
14.07k points
14.03k 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
820
925
Test#1 (Integers)
1.46k
1.52k (x1.04)
Test#2 (FP)
2.6k
2.95k (x1.13)
Test#3 (Generic, ZIP)
1.26k
1.51k (x1.19)
Test#1 (Memory)
0.91k
0.82k (x0.9)
TOTAL
6.23k
6.79k (x1.09)

Multithread

820

925
Test#1 (Integers)
2.93k
2.98k (x1.02)
Test#2 (FP)
5.19k
5.62k (x1.08)
Test#3 (Generic, ZIP)
2.53k
2.87k (x1.14)
Test#1 (Memory)
0.94k
0.82k (x0.87)
TOTAL
11.59k
12.29k (x1.06)

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
820
925
Test#1 (Integers)
1.93k
2.06k (x1.07)
Test#2 (FP)
3.11k
3.32k (x1.06)
Test#3 (Generic, ZIP)
1.49k
1.52k (x1.02)
Test#1 (Memory)
0.91k
0.8k (x0.88)
TOTAL
7.45k
7.7k (x1.03)

Multithread

820

925
Test#1 (Integers)
3.92k
4k (x1.02)
Test#2 (FP)
6.23k
6.32k (x1.01)
Test#3 (Generic, ZIP)
2.99k
2.91k (x0.97)
Test#1 (Memory)
0.94k
0.81k (x0.86)
TOTAL
14.07k
14.03k (x1)

Performance/W
820
925
Test#1 (Integers)
30 points/W
42 points/W
Test#2 (FP)
48 points/W
67 points/W
Test#3 (Generic, ZIP)
23 points/W
31 points/W
Test#1 (Memory)
7 points/W
9 points/W
TOTAL
108 points/W
148 points/W

Performance/GHz
820
925
Test#1 (Integers)
690 points/GHz
686 points/GHz
Test#2 (FP)
1112 points/GHz
1105 points/GHz
Test#3 (Generic, ZIP)
534 points/GHz
507 points/GHz
Test#1 (Memory)
324 points/GHz
266 points/GHz
TOTAL
2660 points/GHz
2565 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