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#1
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Intel -- Socket T or 478
Does it matter which I get performance wise? I read somewhere that the
LGA775 (Socket T) is fragile. Anyone have any recommendations? Thanks for your help! Drew |
#2
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Does it matter which I get performance wise? I read somewhere that the
LGA775 (Socket T) is fragile. Anyone have any recommendations? The first thing to look at is the type of P4 processor available. There is the Northwood-cored P4, identified by it either being called a P4 x.y-B or x.y-C (where x.y is the speed of the processor in GHz, for example, 3.2-C) or by looking at the amount of L2 cache that it has (most often it just says 'xyz cache' or just 'xyz') - the Northwood has 512k of cache. The Northwood will never be listed as one of the 3-digit performance number processors (eg. P4 740). The second is the Prescott (or more derogatory, ****cott). This is identified by it being a P4-E (note - this is *NOT* a P4-EE, this one being Extreme Edition). Also, they have 1MB of L2 cache. Northwood processors are only available in Socket 478 format. Prescott are available in S478 and Socket T packages. Northwood processors are the best that Intel has to offer currently (well, the Expensive Edition P4s are faster and the mobile CPUs are fantastic but they are not generally available). They run relatively fast and with low heat. Prescotts run hotter (65 deg C is not unknown for *light* load, 75 has been known to occur!) *and* slower than their Northwood companions at the same clock speed The logical choice is to go for the Northwood - it is faster, cooler and probably cheaper (not so nowadays as they are getting rarer). One small problem lies in the fact that they are not being made any more and are not available for Socket T. However, Socket 478 is being phased out of existence. Intel will not make new chipsets for S478 motherboards and they will never see things like PCI Express. The only way to go for future compatibility is a Socket T processor and all the disadvantages that it entails. So, you are presented with the unenviable choice of a fast and cool processor that will have no upgrade potential or a (relatively, for its clock speed) slow and hot processor with plenty (I think??) of upgrade potential. One future development for Socket T is that Intel will incorporate 64 bit extensions on to future Prescotts that are compatible with the ones used in AMD64 chips and the ones that will be used in future MS Windows versions. However, I would advise you to drop Intel and get a Socket 939 AMD-64 processor. You can get some very nice motherboards (Asus A8V has been out for a while, upcoming Asus A8N for PCI-Express) and the AMD-64 architecture runs faster and cooler than the Prescotts. If you absolutely must stick with Intel, then you must pick from Socket T for future upgradability or Socket 478 for no upgradability, but good performance and thermal characteristics. |
#3
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On 16-Dec-2004, BananaOfTheNight wrote: Does it matter which I get performance wise? I read somewhere that the LGA775 (Socket T) is fragile. Anyone have any recommendations? The first thing to look at is the type of P4 processor available. There is the Northwood-cored P4, identified by it either being called a P4 x.y-B or x.y-C (where x.y is the speed of the processor in GHz, for example, 3.2-C) or by looking at the amount of L2 cache that it has (most often it just says 'xyz cache' or just 'xyz') - the Northwood has 512k of cache. The Northwood will never be listed as one of the 3-digit performance number processors (eg. P4 740). The second is the Prescott (or more derogatory, ****cott). This is identified by it being a P4-E (note - this is *NOT* a P4-EE, this one being Extreme Edition). Also, they have 1MB of L2 cache. Northwood processors are only available in Socket 478 format. Prescott are available in S478 and Socket T packages. Northwood processors are the best that Intel has to offer currently (well, the Expensive Edition P4s are faster and the mobile CPUs are fantastic but they are not generally available). They run relatively fast and with low heat. Prescotts run hotter (65 deg C is not unknown for *light* load, 75 has been known to occur!) *and* slower than their Northwood companions at the same clock speed Prescott LGA775 processors only run that hot when the processor is inadequately heatsinked and/or the case ventilation is poor!. Intel's heatsink fan unit comes fitted with a thermal pad. This is a one shot item, and because Intel's heatsink can be fiddly to fit, it can be easily damaged. Better to remove this pad and use a thermal paste or compound instead. I did just that on my system, and reduced my Prescott LGA775's core temperature by 10C!. Generally, Prescott idling temperatures of 65C are caused because the heatsink isn't bonded properly to the processor. Plus their using Intel's own "cooling" solution, rather than a better third party solution: http://www.thermaltake.com/coolers/c...2.htm#logoInfo In tests that I conducted a few months ago, I found that my CPU ran approximately 7C hotter using the Intel heatsink than it did using the Thermaltake heatpipe cooler. If your thinking about getting a Prescott processor, for the best and coolest results, you need to use a third part cooling solution, such as the Thermaltake Tower102. Use a thermal paste instead of a thermal pad, and make sure that your case has adequate ventilation!. Typical Prescott, 3Ghz, LGA775 CPU temperatures. Idles: normally between 40 and 45C. When running "Hot": ie: running a CPU burn-in program or SETI@home, the temperature normally rises to between 50 and 55C. At the moment I'm running SETI all the time, I'm overclocking the processor to 3.39Ghz, and the CPU temperature as I'm typing this is 52C. Which is in the same ball park as the temperature measurements made in this article: http://www.gamepc.com/labs/print_con...d=prescottheat In my opinion the LGA775 processor is no more "fragile" than the Northwood 478 processors. |
#4
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Prescott LGA775 processors only run that hot when the processor is
inadequately heatsinked and/or the case ventilation is poor!. ....or if the power is turned on. : ) |
#5
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On 17-Dec-2004, "Noozer" wrote: Xref: news.demon.co.uk alt.comp.hardwa87344 Prescott LGA775 processors only run that hot when the processor is inadequately heatsinked and/or the case ventilation is poor!. ...or if the power is turned on. : ) No comedians please! :-P |
#6
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evidence for Prescotts not being so close to boiling point, snip Point taken. It's those initial impressions from Tom's Hardware that did it for me. The engineering samples probably heated up more than the finalised retail CPUs. In that case, go for Socket T if you need an Intel system. Be sure to put a decent heat sink on it like the one that the parent mentioned. Also be sure to put a decent thermal paste on it, like Arctic Silver 5. There are a few options for your Socket T system. There are motherboards out there that give you the current generation of internal connectors - the Asus P5P800 has AGP and PCI slots (Intel 865PE chipset - a good one), this costs £62. Alternatively, you can get a newer board with PCI Express - like the Asus P5GD2 (older generation, costs £118) or the Asus P5AD2 (newer chipset, costs £135). A 3 GHz Socket T Prescott costs about £120 I still think that you should pick an AMD-64 system instead of the Intel one - you can get a decent system for both relatively low spec (£117 for a 3000+ CPU, £78 for an Asus A8V) and high spec systems (use the same CPU, but stick decent memory in, like Corsair PC3500 and overclock it. Perhaps use an Asus A8N motherboard if you want PCI Express). |
#7
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On Fri, 17 Dec 2004 19:16:01 +0000, BananaOfTheNight
wrote: evidence for Prescotts not being so close to boiling point, snip Point taken. It's those initial impressions from Tom's Hardware that did it for me. The engineering samples probably heated up more than the finalised retail CPUs. In that case, go for Socket T if you need an Intel system. Be sure to put a decent heat sink on it like the one that the parent mentioned. Also be sure to put a decent thermal paste on it, like Arctic Silver 5. There is no reason to believe an engineering sample will run any hotter, unless there is a core design change later. Those P4 are more difficult to cool quite simply because they produce more heat. One can take a very good heatsink and strive for best possible interface to CPU - it will certainly help. Even so, using same/similar quality heatsink and pains to interface it, choosing a different CPU with lower heat output will run cooler, and/or lower fan noise and dust accumulation for same temp. |
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