i7 linux SMP thread at F@H forum

[biodoc]

Here's the thread

Tidbits from the thread:

GA-EX58-UD5, i7 920 default, 3x1Gb DDR3 1600 cas 8 at default clocks, HT enabled....

WU 2669

Single SMP (default) 4879 ppd
Single using SMP 8 is 6689 ppd

-----------

another one @stock

-- i7-920 #1 --

Min. Time / Frame : 3mn 37s - 7644.61 ppd
Avg. Time / Frame : 5mn 22s - 5151.80 ppd
Cur. Time / Frame : 3mn 37s - 7644.61 ppd
R3F. Time / Frame : 3mn 37s - 7644.61 ppd
Eff. Time / Frame : 6mn 39s - 4157.59 ppd

------------------

I realize that this thread is titled i7 920 but I thought some might be interested in i7 940 output.

Project: 2669 (Run 4, Clone 82, Gen 31)

Min. Time / Frame : 3mn 32s - 7824.91 ppd
Avg. Time / Frame : 3mn 32s - 7824.91 ppd
Cur. Time / Frame : 3mn 32s - 7824.91 ppd
R3F. Time / Frame : 3mn 32s - 7824.91 ppd
Eff. Time / Frame : 3mn 49s - 7244.02 ppd

The computer is using Ubuntu 8.04 and running @ stock with the -smp 8 flag and HT on

-------------------
:shocked::shocked:

Running my i7 @ 3.8GHz with HT and -smp 8 flag

So far I've only had 2671 WUs. It does between 10100 and 10200ppd. Avg. Frame time of 2min 43sec

no stock speed results, sorry

--------------

For reference, here's my rigs (all @3.24GHz, Q6600) ubuntu 8.04 linux

Project : 2671
Core : SMP Gromacs CVS
Frames : 100
Credit : 1920


-- family_room_SMP --

Min. Time / Frame : 4mn 39s - 5945.81 ppd
Avg. Time / Frame : 4mn 59s - 5548.09 ppd
Cur. Time / Frame : 5mn 24s - 5120.00 ppd
R3F. Time / Frame : 5mn 18s - 5216.60 ppd
Eff. Time / Frame : 5mn 19s - 5200.25 ppd

-- mark-desktop_SMP --

Min. Time / Frame : 4mn 45s - 5820.63 ppd
Avg. Time / Frame : 4mn 54s - 5642.45 ppd
Cur. Time / Frame : 5mn 07s - 5403.52 ppd
R3F. Time / Frame : 5mn 07s - 5403.52 ppd
Eff. Time / Frame : 5mn 10s - 5351.23 ppd


-- ubuntu-SMP --

Min. Time / Frame : 4mn 40s - 5924.57 ppd
Avg. Time / Frame : 5mn 36s - 4937.14 ppd
Cur. Time / Frame : 5mn 07s - 5403.52 ppd
R3F. Time / Frame : 5mn 06s - 5421.18 ppd
Eff. Time / Frame : 4mn 32s - 6098.82 ppd

FYI, if you upgrade to the latest linux distros, ppd on SMP WUs will drop 20% or so.

No one understands why though!😉

 

[VirtualLarry]

I get anywhere from 6500 to 12500 PPD, with three 9600GSOs in this machine.
Let's compare the cost/PPD, between an i7 machine and a quad-GPU machine.

For my rig:
CPU $40
RAM $20
mobo $150
video cards 4x$60
case $40
PSU $70
PSU splitters $15
fans $30
HD $70 (don't really need a 6400AAKS for a folding box, but what the heck)
DVD $25

total $700

How much did the i7 rig cost?

 

[biodoc]

The i7 rigs are definitely very expensive. I'll price one out with 2 GTX+ cards.

My Q6600s + one 9800GTX+ are getting from 9500-11,500 ppd on linux. The down side is you have to run the GPU client under wine (not easy to set up but is very stable).

 

[biodoc]

All prices from Newegg:

GIGABYTE GA-EX58-UD3R LGA 1366 Intel X58 ATX Intel Motherboard ----- $210
Intel Core i7 920 Nehalem 2.66GHz ----- $295
Crucial 3GB (3 x 1GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Triple Channel Kit Desktop Memory--$95
2 x ASUS EN9800GTX+ DK/HTDI/512M GeForce 9800 GTX+ --$320
CORSAIR CMPSU-750TX 750W ATX12V / EPS12V ----$100
Tuniq Tower 120---$50
Antec 900 case (comes with fans)--- $109
HDD---$70
DVD--$25

Total----$1374

Assuming the i7 920 will overclock to 3.8 GHz, you may get 17-19K ppd on this beast.

 

[Assimilator1]

Whilst it might not win the bang/buck comparision it's interesting to see the i7 being massively faster in another DC project 🙂.

In my i7 DPAD thread you can see that the i7 920 (in Turbo mode at 2.8GHz, HT on) is ~1/3 faster than a Q9300 @3.37 GHz! :Q😎

 

[caferace]

I wonder if the difference is worth it in power savings?

-jim

 

[Assimilator1]

Good point, although I'd imagine if you overclocked it those savings would vanish, albeit at a big jump in output 😀.