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Pentium D 925 vs Core 2 Duo T6400


Description
The 925 is based on NetBurst architecture while the T6400 is based on Core.

Using the multithread performance as a reference, the 925 gets a score of 14 k points while the T6400 gets 19.1 k points.

Summarizing, the T6400 is 1.4 times faster than the 925. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
f65
1067a
Core
Presler
Penryn-3M
Architecture
Base frecuency
3 GHz
2 GHz
Socket
LGA 775
FC-PGA
Cores/Threads
2/2
2/2
TDP
95 W
35 W
Cache L1 (d+i)
16+8 kB
2x32+2x32 kB
Cache L2
4096 kB
2048 kB
Date
October 2006
January 2009

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
T6400
Test#1 (Integers)
1521
1818 (19.55%)
Test#2 (FP)
2948
4665 (58.24%)
Test#3 (Generic, ZIP)
1506
1896 (25.91%)
Test#1 (Memory)
816
953 (16.77%)
TOTAL
6791
9332 (37.42%)

Multithread

925

T6400
Test#1 (Integers)
2982
3316 (11.19%)
Test#2 (FP)
5616
8751 (55.81%)
Test#3 (Generic, ZIP)
2870
3465 (20.72%)
Test#1 (Memory)
819
988 (20.69%)
TOTAL
12287
16519 (34.45%)

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
T6400
Test#1 (Integers)
2059
2294 (11.41%)
Test#2 (FP)
3316
5105 (53.96%)
Test#3 (Generic, ZIP)
1522
2033 (33.55%)
Test#1 (Memory)
799
912 (14.14%)
TOTAL
7696
10344 (34.40%)

Multithread

925

T6400
Test#1 (Integers)
3995
4475 (11.99%)
Test#2 (FP)
6318
9781 (54.81%)
Test#3 (Generic, ZIP)
2905
3875 (33.36%)
Test#1 (Memory)
808
946 (17.06%)
TOTAL
14027
19076 (35.99%)

Performance/W
925
T6400
Test#1 (Integers)
42 points/W
128 points/W
Test#2 (FP)
67 points/W
279 points/W
Test#3 (Generic, ZIP)
31 points/W
111 points/W
Test#1 (Memory)
9 points/W
27 points/W
TOTAL
148 points/W
545 points/W

Performance/GHz
925
T6400
Test#1 (Integers)
686 points/GHz
1147 points/GHz
Test#2 (FP)
1105 points/GHz
2553 points/GHz
Test#3 (Generic, ZIP)
507 points/GHz
1016 points/GHz
Test#1 (Memory)
266 points/GHz
456 points/GHz
TOTAL
2565 points/GHz
5172 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