need recommendations for a PC - Page 2

chappy · 2012-10-17, 00:53

Quote:

Originally Posted by petrw1

It suggests to me that even with modest OC I'm best to stick to Sandy.
Is that the majority consensus?

Thx

Actually looking at the benchmarks it appears that even a stock Ivy out performs an OC Sandy.

Code:

CPU Model			Avg	17.55M	20.05M	24.93M	29.69M	34.56M	39.50M	49.10M	58.52M	68.13M	Trial
				(MHz)	20.05M	24.93M	29.69M	34.56M	39.50M	49.10M	58.52M	68.13M	77.91M	65
					(1024K)	(1280K)	(1536K)	(1792K)	(2048K)	(2560K)	(3072K)	(3584K)	(4096K)	bits
Intel Core i5-3570K @ 3.40GHz	3529	7.05	8.91	10.99	13.21	14.55	18.61	22.84	28.03	30.76	3.09
Intel Core i7-2600K @ 3.40GHz	4450	7.80	10.08	12.29	14.95	16.45	21.01	25.81	31.12	34.68	2.69

that's my $400 3570k i believe :)

Ralf Recker · 2012-10-17, 03:09

The i7-2600K is a little bit faster than indicated above:

4341 5.45 6.83 8.35 9.72 10.95 13.82 17.20 23.86 23.76 2.44

(Windows64,Prime95,v27.3,build 1)

Interestingly the Linux timings are much worse:

4412 8.22 10.49 12.84 15.34 16.98 21.71 27.42 32.89 36.46 3.74

(Linux64,Prime95,v27.4,build 1)

Clockspeed was 4.4 GHz in both cases.

ixfd64 · 2012-10-17, 15:01

I've found a cheaper configuration that uses a GT 555M. Is that card any good?

kracker · 2012-10-17, 19:14

Quote:

Originally Posted by ixfd64

I've found a cheaper configuration that uses a GT 555M. Is that card any good?

...laptop?
Benchmarks don't look good, atleast in gaming, it is less than a GeForce GT 545, it'll probably be proportionate

Yes, GT, not GTX.

swl551 · 2012-10-17, 22:18

I max out my gtx-570 while running two mfaktc instances each producing average of 307M/s.

Overclocking the i7 directly effects the throughput of the GPU. I believe the GPU could produce more output but my i7 hangs if I go over 4.8 ghz.

See screenshot for exact OC configuration.

Dubslow · 2012-10-17, 23:32

Quote:

Originally Posted by ixfd64

I've found a cheaper configuration that uses a GT 555M. Is that card any good?

http://www.mersenne.ca/mfaktc.php?sort=model&noA=1

It's a mobile part (that's what the M is) so it'll get much less than a GT 555, which is already not very good.

From the linked table, my GTX 460 gets 100-120 GD/d; the GT 555M gets ~48. A GTX 570 gets ~255.

kracker · 2012-10-18, 00:12

Quote:

Originally Posted by Dubslow

http://www.mersenne.ca/mfaktc.php?sort=model&noA=1

It's a mobile part (that's what the M is) so it'll get much less than a GT 555, which is already not very good.

From the linked table, my GTX 460 gets 100-120 GD/d; the GT 555M gets ~48. A GTX 570 gets ~255.

48? that's worse than my integrated

kladner · 2012-10-18, 00:13

Quote:

Originally Posted by swl551

I max out my gtx-570 while running two mfaktc instances each producing average of 307M/s.

Overclocking the i7 directly effects the throughput of the GPU. I believe the GPU could produce more output but my i7 hangs if I go over 4.8 ghz.

See screenshot for exact OC configuration.

I can't really saturate a GtX 570 with 4 instances on a Phenom II x6 1090T @ 3.6 GHz. The higher I overclock the GPU, the lower the Sieve Primes go, but I'm not sure that the added power draw yields enough performance to justify the higher temps.

I do wish I had gotten an i7 or i5.

swl551 · 2012-10-18, 01:57

Quote:

Originally Posted by kladner

I can't really saturate a GtX 570 with 4 instances on a Phenom II x6 1090T @ 3.6 GHz. The higher I overclock the GPU, the lower the Sieve Primes go, but I'm not sure that the added power draw yields enough performance to justify the higher temps.

I do wish I had gotten an i7 or i5.

what is your combined M/s?

LaurV · 2012-10-18, 02:16

I am with swl551 and the other people here (i.e. for a i7-2600k; these "k" toys are almost the best price/performance compromise you can get. I am owning two of them and I am quite happy. If you target price/performance per watt, then you can go with ivy, the SB series is more power-hungry). As graphics, you can get a gtx570 around 200 bucks anytime on web (ebay, alibaba, etc) and even from some local shops (physical location), but I would honestly go for a gtx580 (a bit more expensive, prices are going down, but the performance is much better for the same power consumption).

kladner · 2012-10-18, 02:17

Quote:

Originally Posted by swl551

what is your combined M/s?

Sorry. I switched that column to GHz-days/day a couple of months ago. The combined number is 353. I have a hard time believing this, as I am lucky to turn in ~320 GHz-days/day including two CPU cores doing P-1, and a GTX 460 doing CUDALucas.

2012-10-17, 03:09	#13
Ralf Recker Oct 2010 191 Posts	The i7-2600K is a little bit faster than indicated above: 4341 5.45 6.83 8.35 9.72 10.95 13.82 17.20 23.86 23.76 2.44 (Windows64,Prime95,v27.3,build 1) Interestingly the Linux timings are much worse: 4412 8.22 10.49 12.84 15.34 16.98 21.71 27.42 32.89 36.46 3.74 (Linux64,Prime95,v27.4,build 1) Clockspeed was 4.4 GHz in both cases. Last fiddled with by Ralf Recker on 2012-10-17 at 03:31

2012-10-17, 22:18	#16
swl551 Aug 2012 New Hampshire 2³×101 Posts	gtx-570 with i7 2600k I max out my gtx-570 while running two mfaktc instances each producing average of 307M/s. Overclocking the i7 directly effects the throughput of the GPU. I believe the GPU could produce more output but my i7 hangs if I go over 4.8 ghz. See screenshot for exact OC configuration. Attached Thumbnails

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2012-10-17, 15:01	#14
ixfd64 Bemusing Prompter "Danny" Dec 2002 California 2³·313 Posts	I've found a cheaper configuration that uses a GT 555M. Is that card any good?

2012-10-18, 02:16	#21
LaurV Romulan Interpreter "name field" Jun 2011 Thailand 10100000110011₂ Posts	I am with swl551 and the other people here (i.e. for a i7-2600k; these "k" toys are almost the best price/performance compromise you can get. I am owning two of them and I am quite happy. If you target price/performance per watt, then you can go with ivy, the SB series is more power-hungry). As graphics, you can get a gtx570 around 200 bucks anytime on web (ebay, alibaba, etc) and even from some local shops (physical location), but I would honestly go for a gtx580 (a bit more expensive, prices are going down, but the performance is much better for the same power consumption).