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Reply With QuoteWOW, that is a HUGE drop in performance when the CPU is loaded. Looks like you really need a Quad Core to adequately take care of the demand if you plan on pushing your system.
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Nvidia's PhysX is quite CPU demanding, tests show
The folks over at Fudzilla have discovered that Nvidia's GPU PhysX relies more on the CPU than one would expect - a lot more than a dedicated PPU does, anyway.
Read the story in full here...
| CPU: Core i7 3820 @ 4.5GHz |
| M/B: ASUS Rampage IV |
| RAM: 16GB G.Skill RipjawsZ |
| GPU: It varies |
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| CPU: Athlon 64 x2 5000+ am2 @ 2.6Ghz |
| M/B: Asus M2N-E |
| RAM: Corsair 2x 1gb DDR2 |
| GPU: Club3D 8800GTS |
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i noticed that long time ago. and it's cuda to blame. i'm no expert and i didn't research this, but it seems to me that the cpu is supplying the data to gpu therefore cpu can be a bottleneck. so if you have the fastest gpu, you need a pretty fast cpu to use the potential of cuda.
| CPU: E5-26xx @2.54 |
| M/B: MSI X79 GD45 8d |
| RAM: 16GB (2*8) G-Skill Trident X 2400 10,12,12 @1866 |
| GPU: sapphire hd7950 |
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I'm wondering which OS was being run?
When Folding under XP32 The same thing happens ...add load to the cpu and the folding rate collapses.
However under XP64 and Vista 64 Things go much better and there is little effect when the CPU is loaded.
Rig2: 2*e5-26xx (16c/32t @2.4), Asus z9 pe-d8 ws, 32gb ripjawsz under water, rig3 2*e5-26xx (16c/32t @2.4), Supermicro 7047A-T 16GB 1600 ecc reg, on air, Rig4: 2*e5-26xx (16c/32t @3.1), Supermicro x9 DAi 16GB 1600 ecc reg, on air, Rig5: 2*e5-2660 (16c/32t @2.7), Supermicro x9 DRW iF 32GB 1600 ecc reg, on air
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