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System Builder Marathon, Q4 2013: $800 Gaming PC

Overclocking

Overclocking Intel's Core i5-3470 can't get any easier. I kept the company's power-saving features turned on and enabled the “Non K-series Overclocking” option in ASRock's firmware, exposing multiplier settings up to 40x. 

Our Core i5-3470 didn’t need any extra voltage to run stably at 4 GHz with one or two of its cores active. Intel's baked-in limitations step frequency down to 3.9 GHz with three cores active and 3.8 GHz with the CPU under full load. That's not bad, though. We managed a 400 MHz boost in light loads and 600 MHz with all cores active in more heavily-threaded apps.

To help with heat as I overclocked, I disabled PWM fan control, running the CPU and case fans at full duty cycle. Pegged around 2000 RPM, they make so little noise that they're drowned out by the graphics card in gaming tests.

Satisfied with my elevated Core i5 clock rates, I set about tweaking the RAM. Team Vulcan's DDR3-1600 kit needed more than 1.55 V and returned minimal gains. So, I left the modules at their XMP timings and moved on to graphics.

Unfortunately, Gigabyte’s Radeon R9 280X was less cooperative than I expected. Its high factory frequencies delivered excellent stock performance. But with the GPU's voltage locked at 1.131 V under load, it was already running close to the practical limit. I only got another 20 MHz out of the chip before it became unstable. And pushing the card's memory didn't seem worthwhile either. Performance gains with 1600 MHz GDDR5 barely registered at all.

On the bright side, I didn't see any evidence of throttling under load. Even in taxing games, the Tahiti GPU ran at a constant 1100 MHz.

I settled on 1115 MHz core and 1600 MHz memory clock rates. Honestly though, if this card was in my own workstation, I'd leave it at Gigabyte's factory-overclocked settings. The payoff is just too small.

  • khaledegy200
    is there a huge different between i5 3470 and i5 3550p? if not then why don't save money?
    Reply
  • Drejeck
    i5 3550p is kind of a rare beast, when available, it could be a winner, provided you don't need quick sync. Even 750K and 760K BE are just salvaged chips so their availability is not guaranteed. Anyway this are good ways to save money. One thing I don't understand is why build a system with a DVD burner? The last time used it was in 2007, since then I went for USB boot on new systems and I bought an Asus BD writer usb3 12x just to watch BD movies. All I got is coming from digital distribution, I live in Italy, and I have a 10Mbit/s ADSL. I really hate discs right now, obsolete, slow and still used after 27 years. Consoles please go back to cartridge/flash roms, 1 to 5 seconds loading screens and no PC challenge.
    Reply
  • chimera201
    12268757 said:
    i5 3550p is kind of a rare beast, when available, it could be a winner, provided you don't need quick sync. Even 750K and 760K BE are just salvaged chips so their availability is not guaranteed. Anyway this are good ways to save money. One thing I don't understand is why build a system with a DVD burner? The last time used it was in 2007, since then I went for USB boot on new systems and I bought an Asus BD writer usb3 12x just to watch BD movies. All I got is coming from digital distribution, I live in Italy, and I have a 10Mbit/s ADSL. I really hate discs right now, obsolete, slow and still used after 27 years. Consoles please go back to cartridge/flash roms, 1 to 5 seconds loading screens and no PC challenge.

    Not all countries have good internet infrastructure. If that wasn't the case Microsoft wouldn't have to reverse its policies on the X1. Another thing is retail game DVDs costs very less in my country. For example, Bioshock Infinite costs only 15.97$ at launch date. If I were to buy it through Steam at launch date it would have cost me 59.99$

    Reply
  • bemused_fred
    12268507 said:
    is there a huge different between i5 3470 and i5 3550p? if not then why don't save money?

    I know that the writers of "best CPUs" for the money always make a huge fuss about how "oh, you save 7W (or however much it is) by not having the on-board graphics", but I still think it's worth keeping, for if your discrete card gives out on you. My PC buggered up installing my graphics drivers once, and if it weren't for my intel "backup" GPU, my rig would have been bricked.
    Reply
  • pauldh
    12268507 said:
    is there a huge different between i5 3470 and i5 3550p? if not then why don't save money?

    For us, both were available from Newegg at a $10 difference. Either is fine. I chose the -3350P back for the Q1 $600 Gaming PC, and it's OC was limited to 3.5-3.7 GHz with this same Z75 Pro3 mobo. But I actually prefer the -3470 at these prices for reasons stated in the text (higher clocks and backup HD 2500 graphics). It fit in under budget, and its higher Turbo limit provide a 300 MHz boost across the board (3.8-4.0 GHz) when overclocking. That right there is worth $10 in an SBM where value equals a straight bang for buck calculation.

    Reply
  • Onus
    As I believe I said I would in a past SBM article, I have deleted a string of off-topic posts. If an alternate build doesn't follow the rules of the SBM (e.g. all Newegg) it is OFF TOPIC in SBM discussions. Please be aware that discussions of pricing, while not off topic, do need to account for what was available at the time the SBM build was ordered.
    ----
    My own thoughts on this one are mixed. I like to see the challenge of a lower budget. This $800 PC was quite good, however. With the focus on gaming this SBM cycle, this one looks like a shoe-in for value winner. I don't see what two or three times the budget will buy that can offer similar multiples of performance, especially that will be visible in actual use.
    That said, for my own uses, I'd take the "High" to "Max" settings in my games that a GTX650Ti Boost would offer, and put the balance into a SSD.

    Reply
  • Amdlova
    mine 3470 is running at 4.0ghz 4 cores 2 cores at 4.2ghz 3470 is a good cpu ;) maximum fsb i get on that cpu before freezes is 109.
    Reply
  • raede
    I am always glad to see a budget gaming machine build with my definition of budget being in the $750 area. However, most do not include an O.S cost which could easily add $100 to the mix unless you are going with an open source model.
    I currently just built a "budget" machine for my son which ended up close to $850. That build was using an Asus M5A78L-M/USB3 Micro ATX AM3+ motherboard, AMD FX-6300 3.5GHz to (O.C. to 4.3GHz @ 38 C), w/ an Enermax ETS-T40-TB 86.7 CFM CPU Cooler.
    What I wanted had to be tempered with what I could squeeze into the budget so a new Asus Radeon R7 260X 2GB Video Card was put in for now. A WD Caviar (Blue) 1TB drive was put in for storage, G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory and a Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply to make it all run. Windows 8.1 was installed and the case is a nice looking Corsair 350D case.
    My working theory is this rig will run well now and a new video card, better CPU cooler with a faster stronger CPU and an SSD down the road are all manageable upgrades that could keep this machine running good, playable frame rates for several years down the road.
    There is always more than one way to skin a cat and to me this was the least amount I would build with.
    Reply
  • AMD Radeon
    i believe i5 haswell at the same price will make 5-10% performance boost
    Reply
  • khaledegy200
    Thanks for all the info guys.
    Reply