Queries on dual-core AM2 upgrade

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I'm planning a system upgrade from the following main components:

- Skt 754 AMD Sempron 2600+ 1.6GHz 128KB
- Skt 754 Abit NF8
- ATI Radeon 9700 Pro AIW AGP8x
- 512MB Crucial Ballistix DDR1 BL6464Z402
- Seagate Barracuda 7200.8 200GB SATA150 ST3200826AS
- Fortron/Source 400W 24pin ATX FSP400-60THN-P
- DVD-RW drive
- DVD-ROM drive
- Windows XP Pro

I'm planning on building the following:

- Skt AM2 AMD Athlon 64 X2 4000+ 2.0GHz 2x1MB
- Skt AM2 motherboard (unsure which yet)
- Nvidia GeForce 7900GT 256MB PCI Express x16
- 2x 1GB DDR2 (unsure which yet)
- Western Digital Raptor 150GB 10,000RPM SATA150 WD1500ADFD
   (as the master OS, programs and games drive)
- Seagate Barracuda 7200.8 200GB SATA150 ST3200826AS
    (from my current system, as a second storage drive)
- DVD-RW drive (from my current system)
- DVD-ROM drive (from my current system)
- Windows XP Pro

My two questions are:

1.  Will the Fortron/Source 400W 24pin ATX FSP400-60THN-P stretch to
handling the above components?


The maximum load ratings are:

+3.3V    30.0A
+5V    28.0A
+12V1    14.0A
+12V2    15.0A
-12V    0.5A
+5Vsb    2.0A

2.  What bandwidth of DDR2 do I need for an X2 CPU?  Am I right in
thinking that I need DDR2-800 (PC2-6400) ?

Any other comments you want to throw in are welcome.

Re: Queries on dual-core AM2 upgrade

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The number here is 48W for 7900GT. I assume this is 12V@4A.

You can compare the clocks and characteristics of the card you buy,
to the 7900GT and 7900GTX entries here. If your card is clocked
higher than the 7900GT listed here, then bump the power proportionately.

http://www.techpowerup.com/gpudb/ (near the bottom)

From amdcompare.com, the AM2 X2 4000+ is 89W (all the AM2
processors on Newegg are ADA, and not the ADD lower power
version). That means 12V2 = (89W/12V) * (1/0.90) = 8.24A

The 12V1 would be 4A + 0.6 + 0.6 + 1.5 + 0.75 = 7.45A
(I don't count both DVDs spinning at the same time.)

Your supply looks OK.

As for memory, selecting the faster memory presumably means
the bandwidth goes up. Due to the divider issue, it may
not end up running at the rated speed, but that is not
a big deal. In terms of latency, selecting a CAS3 product
will probably surpass the latency performance of DDR400
CAS2 memory, but would drain your bank account.


You can look at some of the benchmarks, to see whether there
is any reason to work up a sweat about your RAM.



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