I'm running an FX-6200 at a stable 4.4Ghz right now. My cpu temps run about 46-47C after 30 minutes of prime95. I cant seem to budge mine past 4.4 and still be stable. But I know very little about overclocking so I am still hoping there might be a way for my system to run a little faster. I would really like to reach 4.6-4.8Ghz. As far as coolers I was running a Hyper 212 plus in push pull until two days ago when I pulled it and installed a Seidon 120M. At first I had the fan drawing air from inside the case and exhausting through the radiator hoping to prevent it from drawing dust into my case. My temps were actually worse than the Hyper 212 plus. I turned the fan around and that helped with my temps now almost exactly the same as they were running with the Hyper 212 plus. Depending on when you look they are the same or maybe 1C higher with the Seidon. I used Acrtic Silver 5 on both coolers and I'm hoping the temps on the Seidon might improve a degree or 2 once the thermal paste burns in.
I bought the Seidon because it was $40.00 with a rebate and I needed another cooler as I am putting another system together right now. It seemed like a good price so I figured I'd give it a try. Hopefully I'll actually receive that rebate. I'm a little disappointed with the Seidon's initial performance. I had hoped it would be an improvement over the hyper 212. But in my opinion it doesn't come close to the 212 plus or the 212 Evo for performance vs value. Especially when you consider that the Evo is supposed to be a degree or so cooler than the 212 plus. Also there is a lot less to possibly go wrong with an air cooler.
If you have a big enough case with good airflow then you cant beat the 212 plus or Evo for the money. My case is a CM 912 HAF with all fan slots full. It has excellent airflow and worked very well with the air cooler. I have no idea how the H70 compares to the Seidon 120M. But the only positive I can see for the Seidon is if your case is to small for the air cooler or does not have the greatest airflow then it might be a good choice. It does seem to be of very good quality. It's not that I think it's a bad cooler as much as I think the Hyper 212 plus and Evo's are excellent for the money. Oh and I just remembered that by turning the fan up I can get the Seidon to cool about 1 deg cooler than my 212 plus. But the fan at that level is annoyingly loud.
Don't know if this helps any since your looking at the H70 as opposed to the Seidon 120M. Maybe you can find a comparison between those two. I'd like to hear how your OCing goes. I don't see a lot of people with the FX-6200.
MB: MSI 990XA-GD55 (MS-7640);BIOS: AMI VERSION V22.5, 10/12/2012
CPU: AMD FX-6200
CPU COOLER: COOLER MASTER HYPER 212+ w/2X120MM PUSH PULL FANS
RAM: 8GB G.SKILL SNIPER DDR3 2133 (PC3 17000), MODEL F3-17000CL11D-8GBSR
PSU: PC POWER AND COOLING SILENCER MKII 750W
GPU: GIGABYTE RADEON HD 7870, QTY 1
HDD: SEAGATE BARRACUDA, 500GB, 7200 RPM, SATA 3.0GB/S, QTY1
ODD: ASUS DVD/CD COMBO, QTY 1
AUDIO: ONBOARD REALTEK HD, DRIVER VERSION 6.0.1.6793
CASE: COOLER MASTER 912 HAF
CASE FANS: 2X120MM + 1X140MM INTAKE(FILTERED), 1X120MM + 1X200MM EXHAUST
OS: WINDOWS 7 PRO 64 BIT SP1