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Will the new E6x20 procs OC better?
Hardware Overclocking Discussions about overclocking (alt.comp.hardware.overclocking)
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#1
 
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Will the new E6x20 procs OC better? -
04-05-2007
, 02:16 AM
#2
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I was reading http://en.wikipedia.org/wiki/Intel_Core_2 and noticed that there will be the Core 2 Duo E6540 and E6550 for the same big-lot price as E6300 and upcoming E6320 chips ($163) Does anyone know if these will have big benefits to OCing since the 6540 and 6550 will be typically running at 1333 FSB? In other words, should I wait for these to come out for my new build? I'm guessing they'll work find on a typical OC board with 400+Mhz capabilites... |
http://www.xbitlabs.com/articles/cpu...duo-e6420.html
The E6420 is on retail preorder for between $200-$210 retail right now.
Looks like an excellent time to be on Intel.
--
Phil
#3
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I was reading http://en.wikipedia.org/wiki/Intel_Core_2 and noticed that there will be the Core 2 Duo E6540 and E6550 for the same big-lot price as E6300 and upcoming E6320 chips ($163) Does anyone know if these will have big benefits to OCing since the 6540 and 6550 will be typically running at 1333 FSB? In other words, should I wait for these to come out for my new build? I'm guessing they'll work find on a typical OC board with 400+Mhz capabilites... |
only be achieved by making the FSB higher... This is why it's more
interesting to get the E4300 processor, which has an 800 'MHz' FSB. This can
easily be lifted to 1066 'MHz' and higher, not requiring special chipsets.
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Met vriendelijke groeten, Thomas vd Horst.
#4
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Phil, Non-Squid wrote: I was reading http://en.wikipedia.org/wiki/Intel_Core_2 and noticed that there will be the Core 2 Duo E6540 and E6550 for the same big-lot price as E6300 and upcoming E6320 chips ($163) Does anyone know if these will have big benefits to OCing since the 6540 and 6550 will be typically running at 1333 FSB? In other words, should I wait for these to come out for my new build? I'm guessing they'll work find on a typical OC board with 400+Mhz capabilites... In general, it's easier to OC a processor with lower FSB, since OC'ing can only be achieved by making the FSB higher... This is why it's more interesting to get the E4300 processor, which has an 800 'MHz' FSB. This can easily be lifted to 1066 'MHz' and higher, not requiring special chipsets. |
multiplier?
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Phil
#5
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Thomas wrote: Phil, Non-Squid wrote: I was reading http://en.wikipedia.org/wiki/Intel_Core_2 and noticed that there will be the Core 2 Duo E6540 and E6550 for the same big-lot price as E6300 and upcoming E6320 chips ($163) Does anyone know if these will have big benefits to OCing since the 6540 and 6550 will be typically running at 1333 FSB? In other words, should I wait for these to come out for my new build? I'm guessing they'll work find on a typical OC board with 400+Mhz capabilites... In general, it's easier to OC a processor with lower FSB, since OC'ing can only be achieved by making the FSB higher... This is why it's more interesting to get the E4300 processor, which has an 800 'MHz' FSB. This can easily be lifted to 1066 'MHz' and higher, not requiring special chipsets. Conversely, do you also mean that it's easier to OC a proc with a higher multiplier? |
my native language, hehe...
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Met vriendelijke groeten, Thomas vd Horst.
#6
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Thomas wrote: Phil, Non-Squid wrote: I was reading http://en.wikipedia.org/wiki/Intel_Core_2 and noticed that there will be the Core 2 Duo E6540 and E6550 for the same big-lot price as E6300 and upcoming E6320 chips ($163) Does anyone know if these will have big benefits to OCing since the 6540 and 6550 will be typically running at 1333 FSB? In other words, should I wait for these to come out for my new build? I'm guessing they'll work find on a typical OC board with 400+Mhz capabilites... In general, it's easier to OC a processor with lower FSB, since OC'ing can only be achieved by making the FSB higher... This is why it's more interesting to get the E4300 processor, which has an 800 'MHz' FSB. This can easily be lifted to 1066 'MHz' and higher, not requiring special chipsets. |
which means easier overclocking? Or do you mean that the percentage
improvement for that one chip is greater? Will an E4300 OC to as high of a
top speed as well as an E6x00 series, all else being equal?
Quote:
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Conversely, do you also mean that it's easier to OC a proc with a higher multiplier? |
1. High FSB stresses the NB/SB more but makes fine-tuning easier, as long as
the PCI/AGP/memory buses can be divided to stay at their respective rates.
2. High multipliers are a good thing
3. Mem/PCI/AGP can be held completely independent of the FSB when the
motherboard supports their dividers, thus making the two dependent variables
the FSB and the NB/SB frequencies and temperatures.
Is this somewhat correct? Thanks all.
--
Phil
#7
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'Phil, Non-Squid' wrote, in part: I think I'm beginning to understand. Lower FSB means higher multipliers which means easier overclocking? Or do you mean that the percentage improvement for that one chip is greater? Will an E4300 OC to as high of a top speed as well as an E6x00 series, all else being equal? . 2. High multipliers are a good thing . _____ Not exactly. High multipliers are a necessary evil. The CPU clock is MUCH faster than the memory clock (memory speeds have not kept up with processor speeds and CPUs of the Pentium 4 and later classes are 'super-scalar' (can complete more than one instruction per clock cycle.) *** A higher multiplier means the memory clock is even lower compared to the CPU clock (and the speed gap is even greater.) The higher the multiplier, the greater the relative penalty when the CPU must access memory. Mitigating factor: L1 and L2 caches greatly reduce access time whenever the data/instructions needed are already in the cache (it is not necessary to access main memory; the L1 and L2 caches clock at the CPU rate, though there is a small penalty when the L1 cache must be used and a larger penalty when the L2 cache must be used. Access is still much faster than when the data/instructions are not in the L1 or L2 caches. *** Given two CPUs with the same clock speed, but with different multipliers, the one with the LOWER multiplier will perform better because the FSB speed must be higher, and memory access will be faster IF the memory can run at the same CPU : memory clock ratio. (E4300 @ 1.8 GHz, multiplier of 9X, 800 MHz FSB, 200 MHz CPU clock, CPU clock : memory clock ratio of 1:1) (E6300 @ 1.86 GHz, multiplier of 7X, 1066 MHz FSB, 266 MHz CPU clock, CPU clock : memory clock ratio of 1:1) When the above two CPUs are NOT overclocked, the E6300 will have a slight advantage because the CPU can execute instructions slightly faster AND because memory can be accessed faster AND the gap between the CPU speed and the memory access speed is lower. But when you overclock, the FSB speed must be raised. If the memory is limited to operation at PC8500 ( 266 MHz) clock then the E4300 FSB must be set to 1066 MHz (266 MHz X 9 = 2.4 GHz) and the CPU : memory clock ratio can be kept at 1:1. This gives a CPU speed of 2.4 GHz. With the same memory performance limit, to get the same CPU speed with the E6300, the FSB speed must be set to 1372 MHz ( 343 MHz X 7 = 2.4 GHz) but the CPU : memory clock ratio must be set to 4:3 (or 5:4 if the memory can be pushed a few extra MHz). The two CPUs now have the same speed and about the same memory access speed because the CPU : memory clock ratio must be set to 4:3 for the E6300. The performance is now the same, BUT the 1372 MHz FSB necessary for an E6300 @ 2.4 GHz pushes the limits of the motherboard while the 1066 MHz FSB for the E4300 does not. This becomes an even more critical factor when larger overclocks are attempted. The E4300 and the E6300 can easily operate above 3.0 GHz but the E6300 will be limited by the motherboard FSB capability at a much lower overclock than the E4300. For E4300 vs. E6300 performance, the E6300 wins by a relatively small margin at stock speed and low overclock percentages but a E4300 is capable of higher overclock percentages. |
--
Phil
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