Go Back   Hardware Canucks > HARDWARE CANUCKS COMMUNITY > HardwareCanucks F@H Team

    
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old January 18, 2011, 05:09 PM
Hall Of Fame
F@H
 
Join Date: Nov 2008
Location: Ottawa, ON
Posts: 1,227

My System Specs

Default No gain from Radeon 4870 + Core i5 2500k folding

Hi all,

I'm folding with my primary PC (Core i5 2500k 3.8 GHz / 8GB / Radeon 4870 512MB), and I noticed that no matter what I do with the settings, having my GPU + CPU folding together can't improve over just the CPU folding SMP units.

My setup is as follows:
  • SMP3 Client folding with no advmethods or bigadv, with -smp 4
  • GPU client folding with its default parameters, using Catalyst 10.12 DLLs
  • Environment variables...
  • BROOK_YIELD 2
  • CAL_NO_FLUSH 1
  • CAL_PRE_FLUSH 1
  • FLUSH_INTERVAL 384

If my FLUSH_INTERVAL variable is set to 256 or higher, the GPU client eats ~5% of the CPU time (or 20% of 1 core). I get ~2600 PPD from the GPU but I lose 3000 PPD from the SMP.
If I set my FLUSH_INTERVAL variable to 32-48, the GPU client reportedly does not take any CPU time in Task Manager. GPU gives me ~1050 PPD as it's being starved, but SMP still loses around 1100 PPD.

In both cases, the GPU client takes up an extra 63W (according to my UPS), for a LOSS of total PPD. Does anyone else have an SMP + ATI combo that actually gets positive gain from the GPU?
...or should I stop GPU folding and suffer from the Radeon 4870's bad idle power consumption?

Thanks
__________________
"The computer programmer says they should drive the car around the block and see if the tire fixes itself." [src]
Reply With Quote
  #2 (permalink)  
Old January 18, 2011, 05:41 PM
Allstar
F@H
 
Join Date: Apr 2009
Location: Kingston Ontario
Posts: 926
Default

Every ATI card I've owned sucked too many cpu cycles to be worth using... Combine that will the low PPD the cards puts out... it' a no win situation. I'd fold only on the cpu or get a non fermi nvidia card. Fermi cards suck quite a few cycles as well but not as bad as ATI cards.
Reply With Quote
  #3 (permalink)  
Old January 18, 2011, 05:47 PM
Hall Of Fame
F@H
 
Join Date: Nov 2008
Location: Ottawa, ON
Posts: 1,227

My System Specs

Default

Thanks; as I thought... :(
So the extra wattage is better spent on OCing the i5 further I assume? (given that I'm at 46 Celsius with CPU fan at 1400RPM and my top exhaust fans unplugged, there's headroom left )
__________________
"The computer programmer says they should drive the car around the block and see if the tire fixes itself." [src]
Reply With Quote
  #4 (permalink)  
Old January 18, 2011, 05:56 PM
Allstar
F@H
 
Join Date: Apr 2009
Location: Kingston Ontario
Posts: 926
Default

Ya that's what I would do... O.C. it as far as she'll go and see how much more power it consumes... shouldn't be that much more. You should also see a hefty increase in PPD with the increased clock speed...
Reply With Quote
Reply


Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Intel Sandy Bridge Core i5-2500K & Core i7-2600K Processors Review Comment Thread SKYMTL CPU's and Motherboards 52 November 6, 2011 09:21 AM
Heatsink that is compatible with Radeon 4870 and Radeon 5850? lsquare Video Cards 7 March 28, 2010 08:04 AM
folding on 3 core / core free for gpu folding phil3_66666 HardwareCanucks F@H Team 12 January 11, 2010 07:07 PM
EVGA GTX 260 Core 216 55nm vs Palit Radeon HD 4870 512MB Butkick Video Cards 19 December 1, 2009 09:22 PM