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Old 2008-04-28, 10:57   #1
fivemack
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Feb 2006
Cambridge, England

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Default Phenom question

Are there any motherboards which support a Phenom 9750 processor and 8GB of memory, and have on-board graphics? I don't like the idea of having to buy a graphics card in order to install Linux on what would become a headless box.

I assume that I can't just replace an Athlon64 X2 with a Phenom 9750 in the board I have at the moment.

Actually, the same question applies for boards supporting Q9450 and 8GB ... IME the G965 chipset does not work with 8GB under Linux, the machine runs slower than a dead sloth swimming backwards through congealed treacle.
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Old 2008-04-28, 11:23   #2
akruppa
 
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The AMD 780G chipset has graphics built in. It's aimed primarily at home theater setups as it includes some video decoding in hardware and supposedly allows decoding HD streams even with Sempron cpus. The motherboards I've seen with the 780G chipset all supported at least 8GB, the GigaByte GA-MA78GM-S2H even 16GB. I'm thinking about getting one, as Phenom cpus have Instruction Based Sampling capability which is a boon for optimization work.

Alex
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Old 2008-04-28, 12:35   #3
fivemack
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OK, excellent. This looks quite a nice upgrade for £300 minus whatever you can sell a 1GB AthlonX2/2.3GHz motherboard for nowadays, though I suppose there's a small issue about how much more power the Phenom would take (also, is it really worth £300 to go from having ten cores and 13GB to twelve cores and 20GB on my desk? Probably not)
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Old 2008-05-07, 10:04   #4
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It turns out that there is an issue with using the faster Phenom CPUs (with 125W design power) on many 780G motherboards; after a bit of reading, it turns out that the Gigabyte GA-MA78GM-S2H is certified to work with a 9750 though not with a 9850, and is probably the board to go for.

125W is three kilowatt-hours a day, or about £12 a month from my electricity supplier; the room I keep the compute farm in is already getting distinctly hot, and it's only early May.
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Old 2008-08-16, 19:51   #5
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Default AMD2+ Phenom 9850 +up MoBo (vga) recommendation

Hey,
I use this MoBo ASUS M3A78 Pro, with 780G southbridge/videochip
It is specified for +140W TDP, this will fit for the AMD Phenom new B3 stepping CPUs with 125W TDP or Phenom 9950 with 140W TDP.

It is convenient in terms of overclocking-features and stable and costs 74€.

Most MoBos are not cappable of supporting the new and most fast AMD-Phenom processors (9850, 9950).

Espc. the recommended MoBo GA-MA78GM-S2H is only supporting 95W TDP as for no more than the Phenom 9750 processors with 95W TDP.

So watch out.

cp
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Old 2008-08-18, 01:30   #6
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AMD QuadCore Phenom (9850) 4x2750MHz - full LL 10M

I'm very much sattisfied with my new Phenom 9850 B3 @4x2750MHz!
My quadcore-mashine does full 4x LL (Lucas-Lehmer) primality-tests at >38M length digits.

Phenom 9850 mprime Benchmarks, see below and -> http://www.mersenneforum.org/showthr...446#post139446

Code:
######### best result #######################
[Mon Aug 18 02:13:21 2008]
Compare your results to other computers at http://www.mersenne.org/bench.htm
AMD Phenom(tm) 9850 Quad-Core Processor
CPU speed: 2766.08 MHz, 4 cores, DRAM= DDR2-1094 (547MHz)
CPU features: RDTSC, CMOV, Prefetch, 3DNow!, MMX, SSE, SSE2
L1 cache size: 64 KB
L2 cache size: 512 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
L1 TLBS: 48
L2 TLBS: 512
Prime95 64-bit version 25.6, RdtscTiming=1
Best time for 768K FFT length: 16.606 ms.
Best time for 896K FFT length: 19.688 ms.
Best time for 1024K FFT length: 22.330 ms.
Best time for 1280K FFT length: 27.543 ms.
Best time for 1536K FFT length: 34.139 ms.
Best time for 1792K FFT length: 40.729 ms.
Best time for 2048K FFT length: 46.399 ms.
Best time for 2560K FFT length: 60.527 ms.
Best time for 3072K FFT length: 74.651 ms.
Best time for 3584K FFT length: 88.488 ms.
Best time for 4096K FFT length: 100.376 ms.
Best time for 5120K FFT length: 133.177 ms.
Best time for 6144K FFT length: 163.670 ms.
Best time for 7168K FFT length: 197.966 ms.
Best time for 8192K FFT length: 226.643 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 11.513 ms.
Best time for 896K FFT length: 15.334 ms.
Best time for 1024K FFT length: 18.181 ms.
Best time for 1280K FFT length: 21.109 ms.
Best time for 1536K FFT length: 26.675 ms.
Best time for 1792K FFT length: 30.417 ms.
Best time for 2048K FFT length: 34.781 ms.
Best time for 2560K FFT length: 50.113 ms.
Best time for 3072K FFT length: 57.157 ms.
Best time for 3584K FFT length: 65.265 ms.
Best time for 4096K FFT length: 74.762 ms.
Best time for 5120K FFT length: 92.568 ms.
Best time for 6144K FFT length: 115.150 ms.
Best time for 7168K FFT length: 138.661 ms.
Best time for 8192K FFT length: 156.950 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 10.005 ms.
Best time for 896K FFT length: 17.326 ms.
Best time for 1024K FFT length: 17.202 ms.
Best time for 1280K FFT length: 20.579 ms.
Best time for 1536K FFT length: 25.851 ms.
Best time for 1792K FFT length: 28.921 ms.
Best time for 2048K FFT length: 32.326 ms.
Best time for 2560K FFT length: 46.072 ms.
Best time for 3072K FFT length: 56.295 ms.
Best time for 3584K FFT length: 61.947 ms.
Best time for 4096K FFT length: 67.962 ms.
Best time for 5120K FFT length: 74.275 ms.
Best time for 6144K FFT length: 89.358 ms.
Best time for 7168K FFT length: 103.625 ms.
Best time for 8192K FFT length: 115.110 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 9.740 ms.
Best time for 896K FFT length: 14.956 ms.
Best time for 1024K FFT length: 17.550 ms.
Best time for 1280K FFT length: 20.333 ms.
Best time for 1536K FFT length: 24.185 ms.
Best time for 1792K FFT length: 27.247 ms.
Best time for 2048K FFT length: 30.856 ms.
Best time for 2560K FFT length: 42.195 ms.
Best time for 3072K FFT length: 50.638 ms.
Best time for 3584K FFT length: 56.663 ms.
Best time for 4096K FFT length: 63.414 ms.
Best time for 5120K FFT length: 69.017 ms.
Best time for 6144K FFT length: 83.081 ms.
Best time for 7168K FFT length: 95.880 ms.
Best time for 8192K FFT length: 106.667 ms.
Best time for 58 bit trial factors: 2.888 ms.
Best time for 59 bit trial factors: 2.888 ms.
Best time for 60 bit trial factors: 3.110 ms.
Best time for 61 bit trial factors: 3.062 ms.
Best time for 62 bit trial factors: 3.629 ms.
Best time for 63 bit trial factors: 4.183 ms.
Best time for 64 bit trial factors: 5.058 ms.
Best time for 65 bit trial factors: 5.898 ms.
Best time for 66 bit trial factors: 5.865 ms.
Best time for 67 bit trial factors: 5.850 ms.
#############################################
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