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939 Motherboards with ECC
Do any of the 939 pin motherboards support ECC?. The 939 pin A64 supports
ECC but none of the motherboards seem to mention it and the Crucial site says no ECC for the MSI and Gigabyte boards. I don't see why they would have left an important feature like ECC off since it's essentially free. Is Crucial wrong? |
#2
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On Mon, 09 Aug 2004 11:34:53 -0400, General Schvantzkoph
wrote: Do any of the 939 pin motherboards support ECC?. The 939 pin A64 supports ECC but none of the motherboards seem to mention it and the Crucial site says no ECC for the MSI and Gigabyte boards. I don't see why they would have left an important feature like ECC off since it's essentially free. Is Crucial wrong? oh... NOW you want ECC. LOL. The whole point of 939 was the dual memory controller without ECC/REG memory. El cheapo for the masses. Nobody said it was worthwhile. |
#3
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On Mon, 09 Aug 2004 09:37:29 -0700, george wrote:
On Mon, 09 Aug 2004 11:34:53 -0400, General Schvantzkoph wrote: Do any of the 939 pin motherboards support ECC?. The 939 pin A64 supports ECC but none of the motherboards seem to mention it and the Crucial site says no ECC for the MSI and Gigabyte boards. I don't see why they would have left an important feature like ECC off since it's essentially free. Is Crucial wrong? oh... NOW you want ECC. LOL. The whole point of 939 was the dual memory controller without ECC/REG memory. El cheapo for the masses. Nobody said it was worthwhile. The pinout of the 939 makes laying out the traces for the memory interface easier which allows for the use of a 4 layer board vs a 6 layer board. Because the traces are shorter it also can use unbuffered RAM. However it has full support for ECC RAM so there is no reason not to support it. The other thing that the 939 pin part is missing, vs the 940, is two of the hypertransport buses. The 939 only has 1 vs 3 on all of the Opterons including the 1xx which it replaced. The loss of two of the hypertransport buses is on no consequence to a uniprocessor system because those buses were meant for interprocessor communcation. The single remaining bus is more than sufficient to meet the IO requirements of the CPU, especially since the clock speed has been upped to 1GHz. |
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El cheapo for the masses.
Nobody said it was worthwhile. The pinout of the 939 makes laying out the traces for the memory interface easier which allows for the use of a 4 layer board vs a 6 layer board. Because the traces are shorter it also can use unbuffered RAM. However it has full support for ECC RAM so there is no reason not to support it. The other thing that the 939 pin part is missing, vs the 940, is two of the hypertransport buses. The 939 only has 1 vs 3 on all of the Opterons including the 1xx which it replaced. The loss of two of the hypertransport buses is on no consequence to a uniprocessor system because those buses were meant for interprocessor communcation. The single remaining bus is more than sufficient to meet the IO requirements of the CPU, especially since the clock speed has been upped to 1GHz. I think the big problem would really be finding non-register ECC memory.. I mean they are pair'd together normally so maybee it's purely down to what the market supply's |
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On Mon, 09 Aug 2004 22:53:44 +0000, wrote:
El cheapo for the masses. Nobody said it was worthwhile. The pinout of the 939 makes laying out the traces for the memory interface easier which allows for the use of a 4 layer board vs a 6 layer board. Because the traces are shorter it also can use unbuffered RAM. However it has full support for ECC RAM so there is no reason not to support it. The other thing that the 939 pin part is missing, vs the 940, is two of the hypertransport buses. The 939 only has 1 vs 3 on all of the Opterons including the 1xx which it replaced. The loss of two of the hypertransport buses is on no consequence to a uniprocessor system because those buses were meant for interprocessor communcation. The single remaining bus is more than sufficient to meet the IO requirements of the CPU, especially since the clock speed has been upped to 1GHz. I think the big problem would really be finding non-register ECC memory.. I mean they are pair'd together normally so maybee it's purely down to what the market supply's They do exist, Newegg list a number of unbuffered ECC DIMMs, but only upto 512M. |
#6
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"General" == General Schvantzkoph writes:
General On Mon, 09 Aug 2004 22:53:44 +0000, wrote: El cheapo for the masses. Nobody said it was worthwhile. The pinout of the 939 makes laying out the traces for the memory interface easier which allows for the use of a 4 layer board vs a 6 layer board. Because the traces are shorter it also can use unbuffered RAM. However it has full support for ECC RAM so there is no reason not to support it. The other thing that the 939 pin part is missing, vs the 940, is two of the hypertransport buses. The 939 only has 1 vs 3 on all of the Opterons including the 1xx which it replaced. The loss of two of the hypertransport buses is on no consequence to a uniprocessor system because those buses were meant for interprocessor communcation. The single remaining bus is more than sufficient to meet the IO requirements of the CPU, especially since the clock speed has been upped to 1GHz. I think the big problem would really be finding non-register ECC memory.. I mean they are pair'd together normally so maybee it's purely down to what the market supply's General They do exist, Newegg list a number of unbuffered ECC DIMMs, General but only upto 512M. Actually Kingston makes 1G unbuffered ECC DIMM's what funny is that these DIMM's are cheaper at the kingston web site. Anyway I have been trying to research the same question. The best that I have been able to find out is the ASUS AV8 Deluxe for 939 fully supports ECC. The was confirmed by reading the manual on the web site. Hopefully the manual is not incorrect, but you never know. However, ASUS has had full support on all their Athlon 64 motherboards for ECC support on both nivida and via chipsets (socket 745). I think the nivida board by ASUS for 939 also supports ECC but have not seen the manual. Scroll down to the bottom of this link for memory modules for the ASUS AV8 Deluxe. http://www.ec.kingston.com/ecom/conf...bmit1 =Search I think the point is since this is already in the memory controller on the CPU then why not include support? Can't save that much money not to include this option. It is probably a matter of bios support, please correct me if I'm wrong on this point. For the record most other motherboard makers do not include ECC support for Athlon 64. I read that MSI did for their 939 board using the nvidia chipset but could not find this information in the motherboard online manual. Since 939 is high end according to the review web sites you would expect ECC support on a so called high end workstation motherboard. At least intel includes support for ECC on their high end workstation motherboards. I guess this is really a high end gamer motherboard. All these different meanings for high end motherboards is confusing at least to me. Anyway ECC costs more than non-ECC at the same exact speed, and there are no fast ECC DIMM's like non-ECC. Also when benchmarking ECC is sligthly slower than non-ECC, but the user will never tell the difference. I heard that non-ECC overclocks better than ECC memory but never seen this confirmed in a review. However, the extra cost of ECC is cheaper than some cpu fans or some cordless mouses ;-)). It is amazing that folks demand non-ECC. In the total cost of a high end computer it is not much at all. One last point about ECC that is gotcha. ECC memory will run fine in a non-ECC motherboard but the motherboard will not use the parity chip. So that is a total waste to buy ECC memory to use in a non-ECC motherboard. I have learned this the hard way ;-)). Later, Alan |
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