Bloomfield and X58 vs. Lynnfield and P55 - a guide to help you choose what's best for you.

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Collider

Senior member
Jan 20, 2008
522
7
81
Originally posted by: rolodomo
Great list, but I think the focus on multiple GPU issue is too narrow. The extra x58 pci 2.0 lanes provide flexibility with add-on cards in general. E.g., want to drop in the latest and greatest 8x RAID or RAM disk card, but you already have two GPU(s).? Not really a problem (e.g., 8x 8x 8x).

Is 4x enough for a raid controller running a striped array, say of 2 SSDs or 2 WD Blacks?

 

Shmee

Memory & Storage, Graphics Cards Mod Elite Member
Super Moderator
Sep 13, 2008
7,542
2,542
146
Originally posted by: RussianSensation
Originally posted by: Lothar

I don't see much value in the i7 860 yet.

Power consumption.

860 vs. 920 @ 3.8ghz idle and load

Idle:
920 @ 3.8 = 197 watts
860 @ 3.8 = 125 watts

Load
920 @ 3.8 = 397 watts
860 @ 3.8 = 335 watts

Before I got my Core i7 system I thought getting 4.0ghz is a walk-in-the park. Heck I have no doubts my 860 can do 4.2-4.3ghz because it boots at 210x21 with 1.360V. The problem is at 4.0ghz @ 1.31 volts, my Megahalems is barely able to keep my CPU at 77-78*C at full load (yes it dips to 68-72*C at times, but often goes into the high 70s). I can't imagine the 920 D0 processor running under 80*C on air cooling at 4.0ghz without spikes into the 80s on occasion. Although my case is el-cheapo; so its airflow is terrible.

The biggest hurdle to Core i7 overclocking is CPU temperature, not the processor itself! Under better cooling 5.0ghz is doable, but not on air cooling.

as I stated before, my D0, not the best, does 4.2 under 80 C in linpack. with 1.39 Vcore. Now, I may have a lot more airflow across my TRUE, but the megahalems is still a good cooler with any fan. Still, I am pleasantly surprised at your vcore needs for that 860.

Perhaps with 2 fast fans, you could reach 4.4. Sounds like you got a good chip. 4.2 to 4.5 is seemingly attainable with the better batches of D0's on high end air. Like a lapped true with lots of flow. Basically what I have. I believe Rubicon and some others had a similar setup, but with different fan combos.

Bottom line, looks like you are more cooler limited now than chip limited. Have you tried a better airflow setup? Might be a tad loud, in some cases, but mostly only during stress testing if the smartfan works right.

For the record, I am chip limited, my 920 needs too much vcore past 4.2 GHz.

As for a 4x raid card, PCIE 2.0 runs at 500 MB/s per lane. so the possible PCIe bottle neck on the 4x slot would be 2 GB/s. More likely you will be bottlenecked by the sata II interface, at 600 MB/s for 2 devices. Even more likely, the internal read and write speeds of any 2 drives or current SSDs would be less than that. So you should be fine, unless you have like 10 or more SSDs.
 

alyarb

Platinum Member
Jan 25, 2009
2,444
0
76
Originally posted by: aigomorla
Originally posted by: alyarb
more efficient way to get 8 threads at 4 GHz compared to X58.

better gamble @ 4 is to go via X58 route...

what's the lowest OC on a 860, 3.8 ghz? the lowest i've seen is 3.9 ghz. and you want to spend an extra $80 and up to 40 extra watts with X58 to haggle over 100Mhz or less? be my guest...

 

v8envy

Platinum Member
Sep 7, 2002
2,720
0
0
FWIW, for those of us with a Microcenter nearby the 860 is $29 more expensive. Which is a wash overall considering the existence of quality $160-190 X58 boards.

30 watts means 300 hours to run up $1 at my electricity rates (10c/kwhr). Now there you have a very valid point.

But something is very strange about that chart. CPUs running at the same frequency but with one at a higher voltage than the other should not have the higher voltage part using 1/2 to 1/3 the wattage of the first. The testbed had a 4890 and some velociraptors so we could guestimate that the 920 runs at 140 watts @ 3.8ghz and 1.25v which means the 860 runs at around 70 watts at 3.8ghz and 1.3+ volts... This makes no sense -- other than an integrated PCIe controller the two are on the same manufacturing process with roughly equivalent architectures and performance per clock. The Lynnfield may have more advanced power saving circuitry, but that shouldn't make such a dramatic difference at full load. Something is rotten in Denmark.
 

RussianSensation

Elite Member
Sep 5, 2003
19,458
765
126
Originally posted by: v8envy
This makes no sense -- other than an integrated PCIe controller the two are on the same manufacturing process with roughly equivalent architectures and performance per clock. The Lynnfield may have more advanced power saving circuitry, but that shouldn't make such a dramatic difference at full load. Something is rotten in Denmark.

During CPU overclocking, the difference lies between 30 and 60 W and although the graph only shows results during overclocking, the same is true for the nominal processor mode. This is pretty consistent with other reviews:

i7 860 | GTX285 vs. i7 920 | GTX285
Idle
860 = 88W
920 = 130 W
Difference = 42W

Load
860 = 173W
920 = 212W
Difference = 39W

Xbitlabs, with Static overclocking (no turbo mode)
860 = 346W
920 = 397W
  1. Difference = 51W
(maybe 10W above what is expected)

 

aigomorla

CPU, Cases&Cooling Mod PC Gaming Mod Elite Member
Super Moderator
Sep 28, 2005
20,878
3,229
126
Originally posted by: alyarb
Originally posted by: aigomorla
Originally posted by: alyarb
more efficient way to get 8 threads at 4 GHz compared to X58.

better gamble @ 4 is to go via X58 route...

what's the lowest OC on a 860, 3.8 ghz? the lowest i've seen is 3.9 ghz. and you want to spend an extra $80 and up to 40 extra watts with X58 to haggle over 100Mhz or less? be my guest...

*sigh*...

40W... ummm the fans in my system alone total more then 40W.

But the 920 i got to play with could do 4ghz in its sleep, also could probably climb as high as 4.2

AND 100% of all the air sinks available dont have installation issues on the X58 vs the P55.

AND if your a power user.. No gulftown.
 

imported_Lothar

Diamond Member
Aug 10, 2006
4,559
1
0
Originally posted by: aigomorla
Originally posted by: alyarb
Originally posted by: aigomorla
Originally posted by: alyarb
more efficient way to get 8 threads at 4 GHz compared to X58.

better gamble @ 4 is to go via X58 route...

what's the lowest OC on a 860, 3.8 ghz? the lowest i've seen is 3.9 ghz. and you want to spend an extra $80 and up to 40 extra watts with X58 to haggle over 100Mhz or less? be my guest...

*sigh*...

40W... ummm the fans in my system alone total more then 40W.

But the 920 i got to play with could do 4ghz in its sleep, also could probably climb as high as 4.2

AND 100% of all the air sinks available dont have installation issues on the X58 vs the P55.

AND if your a power user.. No gulftown.

This is the only thing stopping me from jumping on the Lynnfield bandwagon.
I want a cooler that doesn't block my RAM slots, doesn't take more than 2 braincells to install and will allow me to reach 4GHz at decent voltage. I have no intent of going higher than that.

My case is a HAF 932 if that matters. The PSU will be facing down.
Is this something I should be worried about?

I don't care about the remaining features on X58.
 

alyarb

Platinum Member
Jan 25, 2009
2,444
0
76
Originally posted by: aigomorla
*sigh*...

40W... ummm the fans in my system alone total more then 40W.

But the 920 i got to play with could do 4ghz in its sleep, also could probably climb as high as 4.2

AND 100% of all the air sinks available dont have installation issues on the X58 vs the P55.

AND if your a power user.. No gulftown.

it's incredibly foolish to expect sub-$700 gulftown pricing considering only the $1500 extreme edition has been announced. it is not a suitable argument to present gulftown as an "advantage" over P55 since 99.9% of you will not be buying it. none of you are taking into account that turbo mode will only allow 6 cores in C0 to operate at 2.4 ghz. you'll be seeing less than a 50% performance increase in only the best-threaded apps. without some really good overclocking, gulftown is not going to knock your socks off, at all, compared to the high-freq bloomfield performance we're seeing right now. it's just sad that you're using gulftown as a good reason to buy X58, as if bleeding-edge prices are a good investment or something. that is never, ever the case, and you will realize this if you stop to think about it. EE processors were never popular with builders or overclockers and that isn't going to change because of two more cores. no one will buy a CPU that costs twice as much as the rest of the machine.

the QPI controller on X58 consumes 30 watts at idle, 40 W at load. if you all want to cry about PCIe power consumption in one thread and then say 40 watts for QPI is no big deal in another thread, that's fine, but X58 is a +40 W, I don't care how many fans you have. that's great that your D0 can do 4.2. most people can only do 4.0-4.1 and those odds, even best-case, just aren't worth going the extra mile for X58. it's great that you had a good experience, but you want so badly for X58 to be the better choice, even for the budget-conscious, and it just isn't. at best, it's a wash with the obvious budgetary perks learning toward P55. your absolutism in your rhetoric is completely over the top. what do you mean by "100% of all the air sinks available don't have installation issues?"

are you trying to say every 1366 heatsink has a good retention system? because that's untrue. are you trying to say every 1156 heatsink uses a bad retention system? that's also untrue. your aggressive/absolutist approach to this line of reasoning, and extrapolating it to mean that the P55 platform is a poor choice overall, lends to others the possibility that you are more interested in being correct than being reasonable. overall, how much uptime does your X58 board really get if you have to unplug and dismount it every night to cuddle with it?

are you really making a jab at a $20 coolermaster heatsink? if your argument has run out, then stop arguing. leave your argument the way it is with
Originally posted by: aigomorla
bu...bbut gulftown! and 40 watts is just like zero watts!
Don't bring completely unrelated aspects like an allegedly shitty third-party product into the mix. i can easily have you beat there by suggesting that the cost saved over X58 will more than cover a high end, dual 120mm noctua with a solid, straightforward mounting system. and if you're too stupid to figure out how a Coolermaster TX3 is supposed to be mounted, there is a youtube that reviews the procedure for you, and it's a fine heat tower considering newegg is giving it away with the 860. There is nothing wrong with the socket and there are plenty of heatsinks available that are more than adequate for the socket.


Originally posted by: Lothar
This is the only thing stopping me from jumping on the Lynnfield bandwagon.
I want a cooler that doesn't block my RAM slots, doesn't take more than 2 braincells to install and will allow me to reach 4GHz at decent voltage. I have no intent of going higher than that.

My case is a HAF 932 if that matters. The PSU will be facing down.
Is this something I should be worried about?

I don't care about the remaining features on X58.

the PSU is not a problem. if that third brain cell is sentimental to you, there are $30 thermaltake and AC freezer 7 pro rev. 2 heatsinks with a better retention systems than the TX3, and they will all keep a 4 ghz lynnfield cool. the vigor monsoon is pretty damn nice at $55 and the noctua is still decent for $70. of course the heatsink selection is not as wide as the 1366 platform because that platform is a year older, but I think the intel stock cooler, the AC freezer 7 pro rev 2, the Noctua and vigor monsoon have all value and performance segments very well covered for the time being. you can expect models from zalman, xigmatek, thermalright, and so forth in a few weeks.

check newegg combo pricing on heatsinks and you'll see they're knocking $20 or more off all the high-end sinks.

this isn't to say that X58 isn't as good as it always has been, there are just more cost-effective choices to be made that do the same job. if you're lucky enough to get a really nice D0, then you can definitely venture into 4.2-4.3 GHz with less than 1.4 volts, and if you have money to blow, this is the route you should take, even though these samples have been more aggressively binned out of the i7 920 since their introduction. however, this isn't to say that you need 1.4v for a 4 GHz i7 860, either. you may need a little more than a 920, but the voltage myth is quickly becoming an exaggeration. there were a few power-hungry specimens in the beginning, but now it's just turning into an anti-lynnfield myth.

xbit and hexus got their i7 860s to 3.91 ghz with less than 1.3 volts, anand got his to 4.0 at 1.344. guru3d got theirs to 4.2 at 1.4 so you know they could step that down. call me crazy, but I'd say things have improved for lynnfield and some people don't want to give them a second glance. for that all-important third glance, i'm searching google images for 860 CPU-z validation pics and there are numerous 4 ghz lynns with less than 1.35. there were a couple than managed 4.2@1.36v. budget-minded overclockers or people who know what a cost-benefit analysis is have a pretty clear choice to make in my opinion.
 

alyarb

Platinum Member
Jan 25, 2009
2,444
0
76
yeah, i kind of spent time on that post. i don't just come into a thread and bang out "booo X58 owns it's fast it's the best i love x58 gulftown gulftown gulftown rah rah rah" like an orangutan on amphetamines without accompanying my statement with logic or evidence. breaking it down to a general form for other readers is important as lots of people search these forums (even just google searches) and take advice without making their own thread. google refers people to a post in these threads if it is a result of their search term without showing them the OP, so they read a post completely out of the thread's context and think "oh, this applies to me." still, sometimes you get 5 threads per day asking the exact same thing.

and i'm tired of everyone circle jerking over gulftown. i don't care if it can overclock to 6 GHz. It just doesn't make sense for a CPU to cost 500% more than i7 while providing less than a 50% increase in a best-case scenario.
 

imported_Lothar

Diamond Member
Aug 10, 2006
4,559
1
0
Originally posted by: alyarb
Originally posted by: Lothar
This is the only thing stopping me from jumping on the Lynnfield bandwagon.
I want a cooler that doesn't block my RAM slots, doesn't take more than 2 braincells to install and will allow me to reach 4GHz at decent voltage. I have no intent of going higher than that.

My case is a HAF 932 if that matters. The PSU will be facing down.
Is this something I should be worried about?

I don't care about the remaining features on X58.

the PSU is not a problem. if that third brain cell is sentimental to you, there are $30 thermaltake and AC freezer 7 pro rev. 2 heatsinks with a better retention systems than the TX3, and they will all keep a 4 ghz lynnfield cool. the vigor monsoon is pretty damn nice at $55 and the noctua is still decent for $70. of course the heatsink selection is not as wide as the 1366 platform because that platform is a year older, but I think the intel stock cooler, the AC freezer 7 pro rev 2, the Noctua and vigor monsoon have all value and performance segments very well covered for the time being. you can expect models from zalman, xigmatek, thermalright, and so forth in a few weeks.

check newegg combo pricing on heatsinks and you'll see they're knocking $20 or more off all the high-end sinks.

this isn't to say that X58 isn't as good as it always has been, there are just more cost-effective choices to be made that do the same job. if you're lucky enough to get a really nice D0, then you can definitely venture into 4.2-4.3 GHz with less than 1.4 volts, and if you have money to blow, this is the route you should take, even though these samples have been more aggressively binned out of the i7 920 since their introduction. however, this isn't to say that you need 1.4v for a 4 GHz i7 860, either. you may need a little more than a 920, but the voltage myth is quickly becoming an exaggeration. there were a few power-hungry specimens in the beginning, but now it's just turning into an anti-lynnfield myth.

xbit and hexus got their i7 860s to 3.91 ghz with less than 1.3 volts, anand got his to 4.0 at 1.344. guru3d got theirs to 4.2 at 1.4 so you know they could step that down. call me crazy, but I'd say things have improved for lynnfield and some people don't want to give them a second glance. for that all-important third glance, i'm searching google images for 860 CPU-z validation pics and there are numerous 4 ghz lynns with less than 1.35. there were a couple than managed 4.2@1.36v. budget-minded overclockers or people who know what a cost-benefit analysis is have a pretty clear choice to make in my opinion.

That 3rd brain cell is a bit more than sentimental.
I'm upgrading from a 6+ yr old P4 2.4C Northwood and Barton 2500+.
It's just that I haven't played with or seen any of the big tower heatsinks that have been released the past 5 years in real life, or mounting back plates and things like that.
I would really hate to order a Megahalem to find out it blocks my RAM slots.
This isn't to say that I don't appreciate a challenge however.

I suppose I could run at stock until better coolers/retention systems come out, but I hate taking my computer apart and haven't done so in 2-3 years.

My fan on both systems was the stock Intel HSF which got me to 3.42GHz and a Zalman which got me to 2.2GHz. No mount needed or anything like that, just easy clip on stuff.

So far, the myth that Lynnfields are "hard" to overclock seems to be busted because I see 3.8+GHz everywhere.

Gulftown?
Don't give a crap hoot about that. Unless your job is to archive files for a living or test benchmarking software, you'd be an idiot to spend $1,000 on a processor.
 

alyarb

Platinum Member
Jan 25, 2009
2,444
0
76
the big super coolers will allow you to rotate your heatsink however you wish. this is good so that you can rotate it out of the way of memory slots.

most people orient it like this
http://www.johnhok.com/wp-cont...ploads/2009/03/078.jpg

you can have a fan on either side, or a fan on both sides. doesn't matter as long as the broad side of the heatsink is paralell to your DIMMs and thus perpendicular to the air current in your case, it will fit and perform well. this is how you mount a heat tower, it doesn't matter if you're on 1156, 1366, or AM3

bolt-through mounting is a piece of cake, especially if you're doing a ground-up build because your motherboard is already out of the case.

even entry level heat towers have the fan high enough so that the memory is not a problem:
http://media.photobucket.com/i...o-TT-120smartfan-1.jpg

the AC freezer 7 can rotate also.
 

DDDavey

Member
Oct 20, 2000
195
0
0
Good info. Does this still hold true 4-5 months later? I am doing a ground-up build, planned on using an i7 920.
 
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