P4 800FSB & 400FSB

[phpdog]

Hi ,

Is the difference between P4 800FSB and 400FSB a big performance boost ?

Is it really worth paying the xtra money ... its just because i have a 800FSB motherboard , but a 400FSB cpu and i was thinking of upgrading ... will i notice a major difference ... or isnt it that noticable ?

 

[een]

Yes, A WHOLE LOT.....

Pentium4A (400 FSB, 100 mhz quad pumped) has been kicked around by equivalently rated athlon and even p3s with lower clock speed. The reason being P4A is bandwidth starved, and the bottleneck is in the interface between the memory and the cpu (fsb)
You could buy an Athlon 1700+ and it would whoop P4A 1.7's bottom...

And then comes P4C with double the FSB (200mhz quad pumped) and it changes the whole scene, P4C is speed king (I am excluding Athlon 64 out of the picture) and it whoops AMD's similarly rated CPUs...

So yes, you will notice the boost, not to mention you can get a P4C 2.6 and overclocks it to P4C 3.0 up...

 

[AkumaX]

P4A's weren't that bad... they had the 512kb cache that helped seal a little bit of the gap between the AXP back in the day, but the P4 w/ 256kb... ...could TOTALLY whoop a P4C anyday of the week!!!!

 

[Duvie]

If you are have some Pc3200 ram you should see a nice boost in jsut being able to use all the bandwidth of the ram....Also the HT is really a nice piece of cake. I am going to be doing a review of all most all features I run with HT off anf then with it on to see all the increases just associated with that easter egg. I can say that in TMPGenc video encoding program same speed p4b versus same speed p4c resulted in near 25% increase with HT on in a single task environment (meaing I was just running this program and not multitasking where HT has a major effect on apps that are not multi-threaded by temselves)

One side note though I can't say I fully aples and apples tested it but from my encoding times of like length movies with same setup at default my 2.6c was about 40% faster then my p4 1.6A@2.74ghz. That cpu was on a single channel DDR mobo, but most will agree and I saw it as well Dual channel really only boosted things5-10%. HT off would have been on ly 15% lead...still noticeable as most things are above 10% and in encoding programs 10% of a 4 hours 2 pass high bitrate encoding means something...

 

[DerwenArtos12]

The main difference that is being neglected here is that the P4C has HT. That alone is a major performance boost.

 

[jiffylube1024]

Originally posted by: AkumaX
P4A's weren't that bad... they had the 512kb cache that helped seal a little bit of the gap between the AXP back in the day, but the P4 w/ 256kb... ...could TOTALLY whoop a P4C anyday of the week!!!!

What? I think you meant that part in reverse or something...