Pentium D 925 vs Core 2 E6400 vs Athlon 64 X2 4400+(2.3ghz).

[shafe88]

How does the Pentium D 925 compare to a Core 2 E6400 and X2 4400+. Just picked up a Optiplex 745 with a Pentium D 925 to replaced my failing athlon system. I just bought a core 2 E6400 on ebay for $10 including shipping to replace the D 925. I know the 745 is old, but I'm on a tight budget and the 745 was only $35.

 

[boosted1g]

If you look up at the top of the forum, there is a box that is called a search box, there is a plethra of information behind it, including exactly what you are asking:

http://www.tomshardware.com/forum/250808-28-core-e6400-pentium

A simple google search of the two processors also gave me this:
http://www.cpu-world.com/Compare/513/Intel_Core_2_Duo_E6400_vs_Intel_Pentium_D_925.html

 

[hans_pcguy]

An E6400 is about 3 times faster than a D925. Plus it puts out about 1/3 the heat.

 

[kawininjazx]

Pentium D is a real dog, E6400 is not too bad overall.

 

[hans_pcguy]

You can get a much better Core 2 on eBay for $10 than the Core 2 E6400. If you shop for a while you can get an E5700 or a E7400 both much better than a Core 2 E6400. And by the way there are 2 different E6xxx class cpu's One is the Core 2 the other is the Pentium E. For instance the Pentium E6300 is 2.8Ghz the core 2 E6300 is 1.8Ghz. Crazy I know but true. Pentium D is absolute junk. When Core 2 came out Intel saved the company. AMD had been making much better CPU's for years UNTIL Core 2. Since then Intel has dominated the Performance race.

 

[littleleo]

The E4600 was designed as a Dual core model from the ground up the D925 was a refinement of the D800 series. It was and improvement over the D800 models, but the E6000 series was a big improvement over the D900 series.

 

[shafe88]

You can get a much better Core 2 on eBay for $10 than the Core 2 E6400. If you shop for a while you can get an E5700 or a E7400 both much better than a Core 2 E6400. And by the way there are 2 different E6xxx class cpu's One is the Core 2 the other is the Pentium E. For instance the Pentium E6300 is 2.8Ghz the core 2 E6300 is 1.8Ghz. Crazy I know but true. Pentium D is absolute junk. When Core 2 came out Intel saved the company. AMD had been making much better CPU's for years UNTIL Core 2. Since then Intel has dominated the Performance race.

My 745 only supports the E6300, E6400, E6600 and E6700 versions of core 2's.

 

[Chicano]

Click on the Benchmarks links for graphical comparisons. The Core2 Duo E4600 is almost 3 times faster than the D925 and 15% fasten than the Athlon 64 x2 4400+, while the Athlon is about 2.5 times faster than the D925.

Intel Pentium D 925 vs Core2 Duo E6400 (better)
http://cpuboss.com/cpus/Intel-Pentium-D-925-vs-Intel-Core2-Duo-E6400

Intel Core2 Duo E6400 (better) vs AMD Athlon 64 X2 4400+
http://cpuboss.com/cpus/Intel-Core2-Duo-E6400-vs-AMD-Athlon-64-X2-4400#performance

Dell OptiPlex 745 Tech Specs
http://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf

 

[Chicano]

My 745 only supports the E6300, E6400, E6600 and E6700 versions of core 2's.

If you check the Intel Product details, both E6400 and E7400 CPUs are the same FSB speed and Max TDP, so there is no reason why your motherboard would not support the Core 2 Duo E7400.

If your source is the Dell Optiplex 745 specifications sheet, the reason it only includes up to E6000 series in the CPU support list, it's probably because the list was published when the E6000 series were the latest Intel CPUs and the page was probably never updated as the case is on almost every old system description you can find.

http://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf
http://ark.intel.com/products/27249/Intel-Core2-Duo-Processor-E6400-2M-Cache-2_13-GHz-1066-MHz-FSB
http://ark.intel.com/products/36500/Intel-Core2-Duo-Processor-E7400-3M-Cache-2_80-GHz-1066-MHz-FSB

 

[shafe88]

My 745 only supports the E6300, E6400, E6600 and E6700 versions of core 2's.

If you check the Intel Product details, both E6400 and E7400 CPUs are the same FSB speed and Max TDP, so there is no reason why your motherboard would not support the Core 2 Duo E7400.

If your source is the Dell Optiplex 745 specifications sheet, the reason it only includes up to E6000 series in the CPU support list, it's probably because the list was published when the E6000 series were the latest Intel CPUs and the page was probably never updated as the case is on almost every old system description you can find.

http://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf
http://ark.intel.com/products/27249/Intel-Core2-Duo-Processor-E6400-2M-Cache-2_13-GHz-1066-MHz-FSB
The]http://ark.intel.com/products/36500/Intel-Core2-Duo-Processor-E7400-3M-Cache-2_80-GHz-1066-MHz-FSB

The optiplex 745 doesn't support any of the 45nm core 2's. I searched dell forms and it seams like the fastest CPU supported is the Q6600.

 

[hans_pcguy]

You can get a much better Core 2 on eBay for $10 than the Core 2 E6400. If you shop for a while you can get an E5700 or a E7400 both much better than a Core 2 E6400. And by the way there are 2 different E6xxx class cpu's One is the Core 2 the other is the Pentium E. For instance the Pentium E6300 is 2.8Ghz the core 2 E6300 is 1.8Ghz. Crazy I know but true. Pentium D is absolute junk. When Core 2 came out Intel saved the company. AMD had been making much better CPU's for years UNTIL Core 2. Since then Intel has dominated the Performance race.

My 745 only supports the E6300, E6400, E6600 and E6700 versions of core 2's.

Sorry I read it wrong. Thought it was 755. If you want you can get a Optiplex 755 motherboard for $17 on eBay, new old stock. Pretty sure it's a easy swap. Then you can run any Core 2. If you want to go that route I can give you all the info you need.

 

[hans_pcguy]

Hans didnt realise the later pentiums with the same name are 40 nmetre tech, and despite the higher clocks they have less transistors,cache etc,so are about the usual + 5% peformance. The supported architecture you speak of is conroe. C2D 65 nm E6600's are the usual max. edit; you say e6700 ok...
Obviously if you can run a kentsfield quad Q6600 thats the way to go.
Check out Q6600 compatible before looking at anything else.
Q6700's are a lot dearer .

Yes, Like I just stated, I misread. Was thinking 755. Which will handle the 45nm. It will run this guy here:
http://ark.intel.com/products/35428/Intel-Core2-Quad-Processor-Q9650-12M-Cache-3_00-GHz-1333-MHz-FSB