c1 2.4 or c1 2.66??

[tstrike]

2.4 c1 is selling for i think $210
and
i can get a 2.66 for $260

buying 2 sticks of xms512-3200c2 for 1gb of memory
with asus p4pe mobo

whihc would a better cpu to get and overclock?

using it for 3d rendering and high-end gaming

thanks

 

[halkebul]

Wait for the Gigabyte 8INXP Limited Edition for that build. It includes Dual Channel DDR support - doubles memory bandwidth. More suitable for future upgrades - more powerful northwoods and prescotts. Get the 2.4B with C1 stepping and increase the FSB to 170MHz (this has already been done). In which case, you be cruisin at 3.06GHz with a 680MHz QDR FSB!!! Good memory choice.😉

 

[fyleow]

With the C1 2.4 ghz I can barely touch 3 ghz with my water cooling setup and about 1.7 V core. I don't really recommend it unless you have extreme cooling or you are really lucky. Go for the 2.66 and you will get a better OC. My 2.53 ghz B0 stepping OC/s better than my 2.4 ghz C1 stepping. Yes there are those that overclock to 3.6 ghz etc but they are rare. The reason why you see so many success stories with 1.6As and 1.8As going to 3 ghz is not because they are better OCers. It's because they are cheap and bought more, the lucky few like to brag and they brag a lot. The losers just skulk off.

Umm why do you need 680 mhz QDR?? With the dual channel DDR you need no more tham 133 mhz memory, anything else is a waste because the CPU won't take advantage of the extra bandwith.

 

[christoph83]

Umm why do you need 680 mhz QDR?? With the dual channel DDR you need no more tham 133 mhz memory, anything else is a waste because the CPU won't take advantage of the extra bandwith.


Granite bay chipsets do take advantage. The FSB and memory are 1:1. So when you increase the FSB you increase the memory as well and they stay in sync. No wasted bandwith.

 

[fyleow]

Originally posted by: christoph83
Umm why do you need 680 mhz QDR?? With the dual channel DDR you need no more tham 133 mhz memory, anything else is a waste because the CPU won't take advantage of the extra bandwith.


Granite bay chipsets do take advantage. The FSB and memory are 1:1. So when you increase the FSB you increase the memory as well and they stay in sync. No wasted bandwith.

Yea just like the Nforce chipsets getting HUGE performance boosts with DDR on the Athlon platform eh?

The problem with DDR was that it did not provide the 4.6 gb/sec bandwith that Rambus did and the P4 needed. With the Dual channel DDR the memory bandwith is as fast as PC 1066 Rambus at 133 mhz. Any extra bandwith will not be used by the processor. The Nforce is a good example of that, nobody liked it when it was released because even though it did provide the extra bandwith it did absolutely nothing.

EDIT: christoph83 Yes I see what you are saying and it's true. However we are arguing different things. He suggested that he get the 2.66 over the 2.4 because the multiplier was lower and that would give better memory bandwith. I am just saying that with the 2.66 and Dual channel it doesn't matter what the multiplier is. The memory can match the CPU's bandwith needs at default speeds. Yea, overclocking will keep the 1:1 ratio and the bandwith will be used but whether it's with the 2.66 or 2.4 it will be the exact same thing.

 

[christoph83]

I guess what halkebul was pointing out is if you have a 2.4ghz c1 that hits 3ghz and a 2.66ghz c1 that hits 3ghz. The 2.4ghz will perform better with granite bay because you have a higher FSB. So on granite bay at 3ghz, 680fsb will be better than 3ghz 600fsb.

Yes the 2.66ghz may hit 3ghz more easily. But you will more than likely see a better overclock out of the 2.4ghz. No garuntees though.

 

[tstrike]

so a 2.4b c1 is better than the 2.66 performace when overclock?
not palnning to wait that long till when the gb mobo will actually arrive
since planning to get this system before x-mas

prob a good thing ti wait anyways since first generation chips always have
"glitches"

saw one of the review site ocing a 2.66 with 175fsb to 3.5ghz

 

[moregolf]

2.53 Better OC'ing...

 

[halkebul]

Yea just like the Nforce chipsets getting HUGE performance boosts with DDR on the Athlon platform eh?

Hello fyleow. The Athlon doesn't benefit as much as the Penium4 from more memory bandwidth. No comparisons to nforce2 are possible in this respect. And when you take into account future upgrades to 800MHz QDR FSB northwoods and prescotts, the granite boards are superior. These future processors will need more bandwidth than what is provided by single-channel DDR chipsets. If you look at all of the future chipsets for Pentium4 they all support dual-channel. See where things are going? More memory bandwidth.

 

[halkebul]

Originally posted by: tstrike
so a 2.4b c1 is better than the 2.66 performace when overclock?

Higher FSB is more important than clock speed. If you have two processors with different FSB speeds operating at the same clock speed, the one with the higher FSB will be faster. That is, a 2.4B overclocked to 3GHz is faster than a 2.66 overclocked to 3GHz. And more importantly, the C1 2.4B cost less.

 

[fyleow]

Originally posted by: tstrike
so a 2.4b c1 is better than the 2.66 performace when overclock?
not palnning to wait that long till when the gb mobo will actually arrive
since planning to get this system before x-mas

prob a good thing ti wait anyways since first generation chips always have
"glitches"

saw one of the review site ocing a 2.66 with 175fsb to 3.5ghz

In my experiences I have never encountered a chip that overclocked better than a higher rated one.

I have gone though three Pentium 4 1.6s two 1.8s one 2.26 one 2.4b and one 2.8.

The best overclocker was the 2.8 ghz P4. Even though the 2.4 had a newer pack date. The 1.6s and 1.8s were from awhile ago but the packdates were vastly different as well. On the whole I found that 2.8 > 2.4 > 2.26 > 1.8 > 1.6 in terms of max speeds after overclocking. However which overclocks better will vary (by overclock I mean 2.4 to 3ghz is a 600 mhz overclock and not the maximum value).

Halkebul the Pentium benefits more with dual channel because the memory bandwith is not yet satisfied with single channel DDR while the Athlon is. With dual channel DDR the Pentium 4's memory needs is satisfied and so the multiplier matters less when considering memory bandwith. However, the benefits from a higher clocked PCI and AGP with a higher FSB still exists.

 

[halkebul]

Halkebul the Pentium benefits more with dual channel because the memory bandwith is not yet satisfied with single channel DDR while the Athlon is.

Hello again. I agree. But bandwidth needs are not completely satisfied for Socket A Athlon until all Socket A athlon processors have their bandwidth needs met. Future AMD 400MHz DDR FSB Bartons, for example, will require more bandwidth. So, on the Athlon side also, there is a move to dual-channel DDR SDRAM. And even the soon-to-be released VIA KT400A chipset will support dual-channel. When making a motherboard purchase, upgradability is very important. In that spirit, the dual-channel DDR SDRAM solutions are without doubt, the perfect choice.

 

[tstrike]

cant the 2.66 hit 170 fsb?
with the xms512-3200c2?

 

[halkebul]

Originally posted by: tstrike
cant the 2.66 hit 170 fsb?
with the xms512-3200c2?

Only with an extreme cooling setup would I expect it. In which case it would be operating at 3.4GHz. 3GHz is the target IMO. Doesn't require unsafe voltages. So, you don't have to worry that your northwood is dying, because of high voltage, over time. The C1 2.4B, as opposed to the 2.66, will give you the faster 3GHz processor.