Random Ramblings

Untitledone

[H]ard|DCer of the Month - April 2012
Joined
Feb 28, 2011
Messages
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Hi there [H] folding community. Was a little bored so I thought I would post.

I overclocked my Phenom 9600 some more. It will be a little while before I get to see how much more PPD I get from the overclock. I am running at 237x11 for a clock speed of 2607mhz at 1.23V. I was running at 235x10.5 (2467mhz) at stock 1.25V (1.23V actual). I got a nice extra 140mhz overclock with no extra voltage (stock is 2300mhz). Too bad this is an original phenom with the TLB bug (patch off for performance of course), and crappy silicon. Its got the stupid wall around 2.7ghz. I got it all the way to 2678mhz before it would blue screen, anything less than 2678mhz can run prime 95 for a while. However to stabilize anything higher than that requires a massive voltage increase (1.375V and up). So I decided that I did not want to throw that much voltage to get such a small increase.

I am happy though, I squeezed a little more out of the processor without much effort. I was pulling 155 watts at the wall at 235x10.5 (2467mhz). Now I am at 158 watts at the wall for 237x11 (2607mhz) so not bad for 140 more mhz at only 3 more watts. The bus could probably go higher but I didnt really want to mess with it more. So that means my HT is at 2133mhz (237x9) with the muliplier on auto, and northbridge should be similar, I dont remember what the default multplier was.

I will see what my PPD is after a few more days. I was around 4500 PPD before.

Also, has anyone built a folding rig utilizing the cheap G34 8 core magny-cours? I would assume it would make some decent PPD at a good price. The processors are around $275 a piece new. So a dual socket would have 16 cores at 2ghz, and the quad socket would have 32 cores at 2ghz a piece. So a quad socket occupied with 8 core processors would have about the peformance of three 12 core magny-cours at 1.7-1.8Ghz. Dual socket with the 2ghz 8 cores would have about the performance of a single 12 core at 2.6-2.7ghz. That doesnt sound too bad at the retail prices of the 8 core chips. If they were able to be obtained used then the value would be even greater.
 
I had a 9600, terrible processor in terms of performance but a neat little cpu for the money at the time. The TLB issue with that cpu was BS, and the fix nearly crippled it.
 
I had a 9600, terrible processor in terms of performance but a neat little cpu for the money at the time. The TLB issue with that cpu was BS, and the fix nearly crippled it.

Its not too bad, AMD interger performance has been behind for a while. Overclocked its about the same as a stock clocked Q6600 in interger. However the floating poing performance is on par with the Q6600 pretty much clock for clock. Folding wise it is about as good as a Q6600 as well which was the original competition for the 9600. I have the TLB patch disabled in the bios. However windows vista SP1 and up, and windows 7 both have a software TLB patch that needs a 3rd party program to write directly to the processor after start up to remove. So you have to disable the TLB patch in the bios, AND get the phenom TLB patch disable program to undo the windows TLB patch to get the full speed of the processor.

I really wish I would have gotten the 940BE at the time but I was already over budget and had to settle with the 9600BE.

I have had this to 3ghz but the stock BE heat pipe cooler is just not enough for that much.
 
Also, has anyone built a folding rig utilizing the cheap G34 8 core magny-cours? I would assume it would make some decent PPD at a good price. The processors are around $275 a piece new. So a dual socket would have 16 cores at 2ghz, and the quad socket would have 32 cores at 2ghz a piece. So a quad socket occupied with 8 core processors would have about the peformance of three 12 core magny-cours at 1.7-1.8Ghz. Dual socket with the 2ghz 8 cores would have about the performance of a single 12 core at 2.6-2.7ghz. That doesnt sound too bad at the retail prices of the 8 core chips. If they were able to be obtained used then the value would be even greater.

A 4P 6128 (2GHz) would be around 170K ppd if my spreadsheet is accurate at that data point with 2P around 60K ppd. Frankly, 4P is somewhat interesting, 2P I would just get a Core i7-2600K.
 
A 4P 6128 (2GHz) would be around 170K ppd if my spreadsheet is accurate at that data point with 2P around 60K ppd. Frankly, 4P is somewhat interesting, 2P I would just get a Core i7-2600K.

Really, its that low for the 2P? I would have expected the 2P to be at least 80-100K, and the 4P 200K+. The 2P would be 16x2ghz which is 32ghz, and the 4P would be 32x2ghz which would be 64ghz. A 4P 12 core magny-cours at 1.7ghz would give you 48x1.7ghz which would give you 81.6ghz for comparision. Well I guess thats about right.

4P of the 2ghz 8 cores, is about 21% slower than 4P for the 1.7ghz 12 cores. The 21-22% slower number would also apply to the 2P 8core vs 2P 12core. The 2ghz 8 core is about 30% slower than the 1.9ghz 12 core. So 30% less performance per socket for the 2ghz 8core vs 1.9ghz 12core. However the 1.9ghz 12core is $769 per CPU, the 2ghz 8core is $269. Essentially all the other hardware would be the same since they are the same socket, so more data would be needed to see if it is a cost effective solution. If everything else is the same then the 2ghz 8 core would provide 70% of the 1.9ghz 12 core at 1/3 the price ($769/2.85) for the CPU's.
 
It's bigadv so you really need to go big or go home to get optimal ppd and efficiency. (or OC a 2600k to 4.7ghz)
 
Really, its that low for the 2P? I would have expected the 2P to be at least 80-100K, and the 4P 200K+. The 2P would be 16x2ghz which is 32ghz, and the 4P would be 32x2ghz which would be 64ghz. A 4P 12 core magny-cours at 1.7ghz would give you 48x1.7ghz which would give you 81.6ghz for comparision. Well I guess thats about right.

4P of the 2ghz 8 cores, is about 21% slower than 4P for the 1.7ghz 12 cores. The 21-22% slower number would also apply to the 2P 8core vs 2P 12core. The 2ghz 8 core is about 30% slower than the 1.9ghz 12 core. So 30% less performance per socket for the 2ghz 8core vs 1.9ghz 12core. However the 1.9ghz 12core is $769 per CPU, the 2ghz 8core is $269. Essentially all the other hardware would be the same since they are the same socket, so more data would be needed to see if it is a cost effective solution. If everything else is the same then the 2ghz 8 core would provide 70% of the 1.9ghz 12 core at 1/3 the price ($769/2.85) for the CPU's.

Yea I built a big spreadsheet for this stuff when I was building the two 4Ps and three 2Ps. It even adds up the cost of a Seasonic gold-level PSU (I use them across the farm at this point to make cable interchanges easy) and all the other components. Basically, if you can get a SR-2 on the FS/FT for $1,250 with coolers, dual L5640's, and RAM you'd need at minimum a 4P 6172 to beat the PPD/$ on initial purchase price. The 4P 6166's are close when power is factored in.
 
I really like that idea of standardized modular PSU's. That would work very nicely for nekid type folding. Plus I just wish I had a fleet of gold PSU's.
 
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