Modern CPU Instructions

[prince_xaine]

LGA 775 processors are lacking some modern instructions, such as AVX. I always feel people always neglect the instructions of a processor over the performance of a chip. I believe LGA 775 still performs well in gaming and general use - as long as it has the instructions capable of completing the task.

Are there any modern instructions LGA 1155 processors are lacking? Meaning - besides the speed of the processor and it's ability to complete a task quickly - are there any actual tasks it cannot do?

Thanks in advance!

 

[Supahos]

The biggest difference with them isn't lacking modern instructions, it's lacking how much work it does per clock cycle. Run something like bf5 with a q6600 and a same clocked i3 8*** and you'll see the gap

https://cpu.userbenchmark.com/Compare/Intel-Core2-Quad-Q6600-vs-Intel-Core-i3-8100/1980vs3942

Peak oc on 6600 is same speed as the i3 stock

 

[prince_xaine]

The biggest difference with them isn't lacking modern instructions, it's lacking how much work it does per clock cycle. Run something like bf5 with a q6600 and a same clocked i3 8*** and you'll see the gap

https://cpu.userbenchmark.com/Compare/Intel-Core2-Quad-Q6600-vs-Intel-Core-i3-8100/1980vs3942

Peak oc on 6600 is same speed as the i3 stock

If you get a Intel Core 2 Extreme Q6800 (which is one of the best LGA 775 chips) and play some modern games such as GTA V, The Witcher 3, Just Cause 3 (All games I tested) with a 1050 ti - it can and should run at a stable 30 FPS on ultra quality settings. Which could be had for around $100 if you know where to look. Again - this isn't about the power of the processor but more so the tasks it can perform - no matter how slowly.

 

[Supahos]

And the 8100 is $120 AND will get at least 50% more fps.

A 2200g is under $100 and will still smash the 6800

 

[prince_xaine]

You seem to be confused with the question. I own two LGA 775 systems and a LGA 1155 system and a LGA 1151 system. I'm not looking to buy, I'm just curious because I haven't found something that a LGA 1155 system can't do. (I have a 3700K overclocked to 4.7 GHz)

 

[Supahos]

I'm still running a 3350p with an overclock myself. I'm not arguing that an ivy bridge i7 isn't good enough for anything yet.

Just that CPUs have come a long way since lga 775

I still have a e6800 in use as well.

 

[Supahos]

Intel® SSE4.1, Intel® SSE4.2, Intel® AVX. 3770k

Extensions
Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 9900k so no real change other than better avx support

 

[prince_xaine]

Thanks - I do appreciate not letting me get something that's obsolete! So AVX2 - are there applications that can't use AVX?

 

[Supahos]

Few things use avx to be honest

 

[TJ Hooker]

Are there any modern instructions LGA 1155 processors are lacking? Meaning - besides the speed of the processor and it's ability to complete a task quickly - are there any actual tasks it cannot do?

LGA 1155 CPUs lack AVX2. Not that AVX2 instructions are at all common in normal use from what I know.

It's missing a few other things like TSX-NI instructions, Intel SGX (which is related to security and DRM, I think it might be required to stream Netflix 4K).
https://ark.intel.com/compare/186605,65523

In general, there isn't much that an LGA 1155 can't do compared to a modern CPU, it just does it slower.

 

[prince_xaine]

So essentially - this could be the reason why Ivy Bridge processors are still quite prominent?

 

[Supahos]

No it's mostly that they're honestly only 2 generations behind... Haswell--> skylake---> skylake with clockspeed boosts.

Intel hasn't done anything to help progress computing since the 6th gen processors we're released.

 

[TJ Hooker]

It's because Intel CPUs haven't changed significantly from one generation to the next since Sandy Bridge, with only small improvements to IPC and/or clock speed. Which means that many people who bought a 2500K or better still find their CPU 'good enough' for most of today's tasks. Ryzen and Intel 8th gen finally changed that by bringing increased core counts into the mainstream.

 

[prince_xaine]

If you overclock the Intel Core 2 Extreme Q9770 to about 3.7 GHz, it performs somewhere between i3 and i5 processors. And if you overclock the i7-3770K to around 4.7 GHz, it performs almost well enough to be considered mainstream. I've always noticed how easily you can bridge gaps between generations - but I've never looked into the instructions of the processors themselves. Can the same be said for the AMD side?

 

[TJ Hooker]

A Q9770 would be below a current i3, even OC'd to 3.7 GHz.

AMD CPUs kind of sucked for a number of years until Ryzen came along. Again, there probably isn't much that older AMD chips *can't* do, but they're pretty slow (slower than contemporaneous Intel CPUs).

 

[Supahos]

A good bit below even the slowest i3 or a 2200g by AMD

 

[prince_xaine]

I was talking specifically about gaming applications with the overclocked processors - sorry I didn't elaborate. And I have a few friends that *claim* AMD is better than intel is, but in my opinion, one seems to be better than the other for a bit - then the other takes the lead.

 

[TJ Hooker]

Gaming or otherwise, there's no task where a Q9770 at 3.7 GHz is going to perform better than—or even on par with—a current Intel i3, let alone an i5.

I'd say Intel and AMD are roughly evenly matched at the moment, with either having an advantage in different scenarios. AMD seems to offer a bit better value for money at the moment though.

 

[Supahos]

That's not true it'll be better for enjoying loading screens in Bethesda games lol

 

[prince_xaine]

An i3 from the LGA 1155 socket?

 

[Supahos]

In most games the i3 would still win due to it's single core performance being a bit better. The modern i3s are quad-core that's why they're always better now (though honestly a 2c4t one from skylake up still would be)

But you can buy my 3350p for like $20 on ebay and beat it always as well

 

[prince_xaine]

Hmm when you're right...you're right lol. Still - It's amazing this is up for debate in the first place - with the intel Core 2 processors being 10+ years old

 

[Supahos]

You're talking about a chip that was like $750 or more new vs a $100 chip in the 2200gs case, that also comes with a gpu on it that is better than anything that existed when those chips we're new and it's computing power is nearly double

 

[prince_xaine]

I mean you're not wrong that the 2200G is better, but the 2200G isn't a bad processor anyways.
https://cpu.userbenchmark.com/Compare/Intel-Core2-Extreme-X9770-vs-AMD-Ryzen-3-2200G/m10543vsm441832

Here is an example of an i3 processor:
https://cpu.userbenchmark.com/Compare/Intel-Core2-Extreme-X9770-vs-Intel-Core-i3-2125/m10543vsm3545

 

[Supahos]

I know but that processor was $135 or so at launch only about a year later