Regarding i7-4790k and overclocking!

[Ruru]

I always thought the G3258 was given some sort of special exemption myself... for my G3258 I had a Z97M-PLUS, not a very good motherboard but it did the trick. Also tried it on the Sabertooth Z87 I used to run my 4770K with. Eventually I got a 5775C for the Z97, but that was many years later. Probably still the most interesting CPU Intel ever released to consumers

Yeah, that 128MB eDRAM which could be used as L4 was an interesting one. Wonder why Intel didn't have that on BW-E chips, would've been interesting to see the performance gains.

 

[Dr. Dro]

Yeah, that 128MB eDRAM which could be used as L4 was an interesting one. Wonder why Intel didn't have that on BW-E chips, would've been interesting to see the performance gains.

Not worth it, Broadwell-EP already has very large cache without the L4 latency penalties. It's the Core i7 models that don't have a lot since they are just carved out of the "low end" variant for the E5-1600 v4 series, but the higher core counts have up to 55 MB of cache already. The full die would have 60 MB and 24 cores, but Intel couldn't get great yields on first gen 14 nm so they scaled it back to 22 cores and 55 MB.

There is only one full core BDW processor out in the wild, it's an early stepping A0 engineering sample which carries the sspec code QHYH and as far as I know, only one batch of it made it to eBay. I know a dude who has one (although we haven't been speaking much lately), and almost purchased one myself (in hindsight, should have - would make a great collectible today), but afraid of taxes I wouldn't be able to afford, I ended up buying my final stepping 4669 v3 QS from the same seller back in 2017. 18 cores is kind of "meh whatever" today, but that certainly wasn't the case 8 years ago.

 

[farazejaz25]

Some H series boards actually supported overclocking in the Haswell era. I had a cheapo Gigabyte H81 board which worked perfectly fine with a G3258 @ 4.7GHz 24/7

Though I still wouldn't have ran any quadcore OC'd with that board.


Did you delid the CPU? I'm sure that those 10+ year Haswell original TIMs are dry as hell today.

Yes I did and found out that original paste was hard as rubber, replaced it with liquid metal. And now ram is stable at 2400 with cl13 (originally 1866 11)

 

[Jimster480]

Yeah, that 128MB eDRAM which could be used as L4 was an interesting one. Wonder why Intel didn't have that on BW-E chips, would've been interesting to see the performance gains.

Funny that L4 was like the first ever 3D Vcache on CPU's.... it just wasn't 3D and had some higher access latency... but it did accelerate some tasks very much.
I always personally wanted one of those CPUs but the price was high when they were out and then they went away pretty fast.

 

[stickleback123]

I must have seen literally thousands of OEM business models over the years ranging from original IBM PCs with their 8088 to mega high end workstations that cost more than a nice new car and I haven't seen BIOS control of CPU clock speeds, multipliers, voltages on a single model that wouldn't be in a museum now. Multiplier locking was as much for the benefit of easy assembly for OEMs as the much vaunted prevention of remarking.

RAM speed has been done by SPD since most people on this forum were riding around in their old man's ballbag.

The K CPU might well plug in and work at stock settings but I would bet you both kidneys and my well tested liver that you won't be overclocking it in that HP.

 

[Ruru]

The K CPU might well plug in and work at stock settings but I would bet you both kidneys and my well tested liver that you won't be overclocking it in that HP.

But in these days, getting a K CPU for a H/B chipset board makes actually sense as they have higher clocks... of course if that cheapo board can handle it, but I guess you get my point.