[quote=hj47;197452]Wow :shock:

That definitely makes the i5 look like the better choice. What kind of % speed increase does this kind of GHz help for LL's?

I'm just concerned that at frequencies that high you may corrupt more LL tests than usual?[/quote]

I am keeping a close eye on that. I've had 5 correct doublechecks and one unverified result so far. I might scale back to 3.6 if the unverified goes bad. I wouldn't tolerate more that 1-2% bad results.

The LL test speed scales almost linearly.

I just picked up an Athlon II x4 630 w/MB at Frys this last weekend for $99. Not bad for a $125 CPU and a $75 MB. I'll run some benchmarks when I get it configed. I'm using slow memory, so I'm sure it's not going to run as fast as those owned by others here.

In terms of memory speeds, is there much difference between 1600MHz & 2000MHz in terms of pure Prime95 performance?

I can get the 2GHz G.Skill Ripjaws for only $10 more than the 1.6GHz, but I'm not that certain in it will actually run at that speed.

Like when I overclock the i5, is it possible to keep the DDR3 running at the full 2GHz? Sort of like the 1:1 ratio used for DDR2 memory to keep it at full speed.

:help:

The maximum multiplier on P55 boards is 2:10. So you will need to run your BCLK at 200MHz if you want to run memory at 2000MHz. Look at the link to the anandtech article that was posted on this thread.

Here's my budget:

INTEL - Core I5 750 2.66GHZ SKT 1156 8MB cache
ASUS - P7P55D PRO SKT1156
2x KINGSTON - HyperX/DDR3 4GB 2000MHz CL9 Kit XMP
Noctua NH-U12P SE2 (i5 & i7 ready)
Price: € 745,95

What do you guys think?
[B] [/B]

[QUOTE=em99010pepe;197818]Here's my budget:

INTEL - Core I5 750 2.66GHZ SKT 1156 8MB cache
ASUS - P7P55D PRO SKT1156
2x KINGSTON - HyperX/DDR3 4GB 2000MHz CL9 Kit XMP
Noctua NH-U12P SE2 (i5 & i7 ready)
Price: € 745,95

What do you guys think?
[/QUOTE]

Go for it...

i5-750: Can't go wrong...seems to be a populare choice lately
MB: I have a slight preference to Gigabyte for the MB (it works for me) but as long as ASUS support the CPU and any overclocking you might try I'm sure it is fine. Does it have a video card?
RAM: As long as it is DDR3 and at least 1333; 4 GB is good
Cooler: Note: It's big. It was TOO high for my case; close for others. I cannot put the side back on.
Price: I can't spreak for that. I only know what the US and Canada prices are.

[quote=em99010pepe;197818]Here's my budget:

INTEL - Core I5 750 2.66GHZ SKT 1156 8MB cache
ASUS - P7P55D PRO SKT1156
2x KINGSTON - HyperX/DDR3 4GB 2000MHz CL9 Kit XMP
Noctua NH-U12P SE2 (i5 & i7 ready)
Price: € 745,95

What do you guys think?
[/quote]

Two points (assuming the main purpose of the machine will be prime hunting):

- Unless you really want to use 2 video cards in SLI config, there´s no actual reason to choose the P7P55D [B]Pro. [/B]You may get the P7P55D for approximately 30€ less, with the very same characteristics except SLI.
- I did some quick calculations, and came to the conclusion that you are spending an awful lot of money with the memory (~50%). Are you getting 2 4Gb sticks for a total of 8Gb? Also, getting 2000 MHz mem is probably overkill. DDR3-1600 is a good choice at a more reasonable price.

I need the two PCI-e slots for the future and lots of memory to use msieve, 8 GB is not enough, I pretend to go up to 16 GB.

What is the precise memory [URL="http://www.kingston.com/hyperx/products/khx_ddr3.asp"]part number[/URL] you are trying to get?
I don't think there is anything like 2x4Gb at 2000MHz.
Be careful with what resellers call their memory. A 4Gb [I]kit[/I] is 2x2Gb.
Some 8Gb kits are nothing but 4x2Gb.

Newegg has a very clear listings, but they are a pleasant outlier; all the others list the memory kits misleadingly (the capacity of the whole kit). The "comparison shopping sites" (which are indexing the real sellers, e.g. bizrate, pricegrabber, even cnet) become a total mess. One has to drill all the way down to particular items and their specs to get to the real picture. The real 4Gb modules are hideously expensive [B]and[/B] slow (1600MHz tops, and even then, I wouldn't risk buying these just yet - I foresee several RMAs, one after another, and idle computer during the RMAs; they never cross-post a replacement part).

If you are thinking of using more than 8Gb, you may want to consider the 1366 based system. For a system with 6x2Gb of memory you will pay less than an i5 with 2x4+2x2Gb and the 1366-based system will talk faster to the memory. A clear win, there.


EDIT: on a tight budget, I'd think about an AMD board with DDR2 (deliberately!) and filling it with 12Gb or 16Gb and a new 125W (not 140W) Phenom965. It can use both DDR3 or DDR2 (just not on the same board of course). It all depends on what one wants.

Good catch! I though it was a 2x4GB.
The code of the memory is KHX2000C9D3T1K2/4GX, you are correct, thank you. So all this means I can't have in the future 16 GB of memory on the machine...I will have to replace the 2 GB modules for 4 GB ones....

For the 1366 based system, motherboard and CPU are more expensive than 1156 based systems.

I don't want AMD's, I prefer Intel processors.

Thank you.

Still figuring out a dedicated crunching rig - would it be better to have slower ram, say 1333MHz or 1600MHz with 'tighter' timings than say fast ram (2000MHz) with loose timings?