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Pentium D 925 vs Pentium 4 HT 521


Description
Both models 925 and 521 are based on NetBurst architecture.



Using the multithread performance as a reference, the 925 gets a score of 14 k points while the 521 gets 8.4 k points.

Summarizing, the 925 is 1.7 times faster than the 521. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
f65
f49
Core
Presler
Prescott
Architecture
Base frecuency
3 GHz
2.8 GHz
Socket
LGA 775
LGA 775
Cores/Threads
2/2
1/2
TDP
95 W
84 W
Cache L1 (d+i)
16+8 kB
8+8 kB
Cache L2
4096 kB
1024 kB
Date
October 2006
2004

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
925
521
Test#1 (Integers)
1521
1450 (-4.69%)
Test#2 (FP)
2948
2598 (-11.88%)
Test#3 (Generic, ZIP)
1506
1262 (-16.16%)
Test#1 (Memory)
816
907 (11.09%)
TOTAL
6791
6217 (-8.46%)

Multithread

925

521
Test#1 (Integers)
2982
1201 (-59.71%)
Test#2 (FP)
5616
3042 (-45.84%)
Test#3 (Generic, ZIP)
2870
1482 (-48.37%)
Test#1 (Memory)
819
898 (9.65%)
TOTAL
12287
6623 (-46.10%)

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
925
521
Test#1 (Integers)
2059
1962 (-4.73%)
Test#2 (FP)
3316
3117 (-6.00%)
Test#3 (Generic, ZIP)
1522
1494 (-1.86%)
Test#1 (Memory)
799
910 (13.81%)
TOTAL
7696
7482 (-2.79%)

Multithread

925

521
Test#1 (Integers)
3995
1767 (-55.77%)
Test#2 (FP)
6318
3957 (-37.37%)
Test#3 (Generic, ZIP)
2905
1803 (-37.93%)
Test#1 (Memory)
808
897 (11.03%)
TOTAL
14027
8425 (-39.94%)

Performance/W
925
521
Test#1 (Integers)
42 points/W
21 points/W
Test#2 (FP)
67 points/W
47 points/W
Test#3 (Generic, ZIP)
31 points/W
21 points/W
Test#1 (Memory)
9 points/W
11 points/W
TOTAL
148 points/W
100 points/W

Performance/GHz
925
521
Test#1 (Integers)
686 points/GHz
701 points/GHz
Test#2 (FP)
1105 points/GHz
1113 points/GHz
Test#3 (Generic, ZIP)
507 points/GHz
533 points/GHz
Test#1 (Memory)
266 points/GHz
325 points/GHz
TOTAL
2565 points/GHz
2672 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