Overclocking the PCI-e bus, worth it?

_33 · Jul 22, 2006

Hello,

I have read a couple places that overclocking the PCI-e bus isn't worth it. Basically, most of the discussions I read were something like:

- Will damage GFX card
- Will corrupt data and could crap you HDD data also
- Does 0% improvements to GFX performance

So this guy tried 125mhz bus speed instead of the usual 100mhz

What do you think? Any experience in this?

How about the new ATI chipset RD600 that enables an "AUTO PCIe OVERCLOCKING" mechanism if it detects an X1800 or X1900 card. It will overclock the PCIe on it's own to 125mhz and it can go up to 150 even. Usefull? Please someone try it out and let's see results.

Also the new Nvidia chipset Nfoirce 590 will permit PCI-e overclocking using a technology called "Linkboost". What about that? Will it do something?

Is it possible that the GFX card has to be able to handle the extra bandwidth from the PCIe to enable an overclock of the PCIe bus like a X1800, X1900 or a Geforce 7900 card?

Alec§taar · Jul 22, 2006

I'd also like to get some "feedback/inside-info" on this too

See my subject-line/title above: I have seen an explanation WHY it is to be avoided here on these forums before, & it DID make sense!

I don't have it bookmarked/fav'd though...

* So, for those of you who KNOW this stuff @ that level, I'd also like an "explanation" as to why it is bad to do also!

Thanks!

APK

Azn Tr14dZ · Jul 22, 2006

You guys should try it...I might give it a shot when I get my DFI here, but maybe only a few Mhz at a time, so I won't cause any damage...

INSTG8R · Jul 22, 2006

Interesting tho his tests were with an older card I might test it with my X1900 as I can adjust the PCI-E freq. The other article stated the R600s would adjust for X1800s and 1900s so I suppose it couldnt hurt to try but at this point I really dont need any sort of performance boost .

_33 · Jul 22, 2006

INSTG8R said:
Interesting tho his tests were with an older card I might test it with my X1900 as I can adjust the PCI-E freq. The other article stated the R600s would adjust for X1800s and 1900s so I suppose it couldnt hurt to try but at this point I really dont need any sort of performance boost .

RESULTS!!!

Linkboost PDF from Nvidia

Nitro-Max · Feb 24, 2007

is it worth risking ur mobo and card for a 1 or 2 fps increase its not exactlly enough of a boost to warrent it as far as i can see just oc ur card.

Nitro-Max · Feb 24, 2007

How about the new ATI chipset RD600 that enables an "AUTO PCIe OVERCLOCKING" mechanism if it detects an X1800 or X1900 card. It will overclock the PCIe on it's own to 125mhz and it can go up to 150 even.

this information maybe true but it may require a specially made board also for this function thats capable of running it stable with no damage to card or mobo.i know boards have pci-e overclocking but theres no official documents that say its safe within a set limit its try at your own risk

regan1985 · Feb 25, 2007

i have tried it before on my old asrock i went upto 107, but it made no different after 105 but at 105 i didnt notice much more performance but i did get a extra 15marks in 3dmark o5, i didnt keep it just incase it was doing damage i didnt know about!

natesuniverse · Feb 6, 2008

Yeh EPoX AD580XR, I accidentally set mine (PCI-E) to 200 for over a week with no problems but haven't been playing games either?????????

gOJDO · Feb 6, 2008

There is a little difference in 3D Mark 2006 score. I am using PCI-e @125MHz on a P35-DS4 only for benching. BUT, one of my HD's which is not in RAID config is disappearing once I set the PCI-e above 123MHz. I also have noticed that sometimes the OS can't write data on that HD, when the PCI-e clock is above 115MHz. So I am using my system with the PCI-e clock set at 115MHz and I haven't experienced any problems with any graphics card(have tried a lot of different cards on that board).

System Name	BEAST
Processor	Intel Core i7 920 C0 Quad Core Processor LGA1366 2.66GHZ Bloomfield 8MB LGA batch 3844A509
Motherboard	ASUS P6T Deluxe V2 X58 ATX LGA1366 DDR3
Cooling	CoolIt ECO A.L.C. 120mm radiator
Memory	G.SKILL F3-12800CL8TU-6GBPI PC3-12800 6GB 3X2GB DDR3-1600 CL8-8-8-21
Video Card(s)	Sapphire Radeon HD 4890 1GB 850MHZ 1GB 3.9GHZ GDDR5 PCI-E 2XDVI HDTV
Storage	SAMSUNG SPINPOINT F1 750GB X 2, WD2500KS 250GB, WD15EARS 1.5TB, WD20EARS 2.0TB
Display(s)	LG W2361V-PF Monitors 23” Widescreen LCD Monitor (23.0” diagonal)
Case	Cooler Master CM 690 II Advanced
Power Supply	Thermaltake Toughpower 600W Power Supply ATX V2.2 20/24PIN EPS12V Qfan 140MM Fan Active PFC
Software	Windows 7 Pro 64bit

Processor	DualCore AMD Athlon 64x2 4800+ (o/c 2801mhz STABLE (Ketxxx, POGE, Tatty One, ME))
Motherboard	ASUS A8N-SLI Premium (PCIe x16, x4, x1)
Cooling	PhaseChange Coolermaster CM754/939 (fan/heatsink), Thermalright heatspreaders + fan built on (RAM)
Memory	512mb PC-3200 DDR400 (set DDR-33 for o/c) by Corsair (matched pair, 2x256mb) 200.1/200mhz
Video Card(s)	BFG GeForce 7900 GTX OC 512mb GDDR3 ram (o/c manually to 686 core/865 memory) - PhaseChange cooled
Storage	Dual "Raptor X" 16mb 10krpm/RAID 0 Promise EX8350 x4 PCIe 128mb & Intel IO chip/CENATEK RocketDrive
Display(s)	SONY 19" Trinitron MultiScan 400ps 1600x1200 75hz refresh 32-bit color
Case	Antec Super-LanBoy (aluminum baby-tower w/ lower front & upper rear cooling exhaust fans)
Audio Device(s)	RealTek AC97 onboard mobo stereo sound (Altec Lansing ACS-45 speakers - 10 yrs. still running!)
Power Supply	Antec 500w ATX 2.0 "SmartPower" powersupply
Software	Windows Server 2003 SP #1 fully patched, & massively tuned/tweaked to-the-max (plus latest drivers)

Processor	AMD Athlon 64 3200+
Motherboard	DFI LanParty nf4 Ultra-D
Cooling	Thermaltake Big Typhoon
Memory	2x512MB GeIL
Video Card(s)	ATI Radeon X800XL
Storage	2x80GB Western Digital
Display(s)	HP vs17
Case	SuperTalent
Audio Device(s)	Soundblaster
Power Supply	Ultra X-Finity 500 Watt

System Name	Hellbox 5.1(same case new guts)
Processor	Ryzen 7 5800X3D
Motherboard	MSI X570S MAG Torpedo Max
Cooling	TT Kandalf L.C.S.(Water/Air)EK Velocity CPU Block/Noctua EK Quantum DDC Pump/Res
Memory	2x16GB Gskill Trident Neo Z 3600 CL16
Video Card(s)	Powercolor Hellhound 7900XTX
Storage	970 Evo Plus 500GB 2xSamsung 850 Evo 500GB RAID 0 1TB WD Blue Corsair MP600 Core 2TB
Display(s)	Alienware QD-OLED 34” 3440x1440 144hz 10Bit VESA HDR 400
Case	TT Kandalf L.C.S.
Audio Device(s)	Soundblaster ZX/Logitech Z906 5.1
Power Supply	Seasonic TX~’850 Platinum
Mouse	G502 Hero
Keyboard	G19s
VR HMD	Oculus Quest 2
Software	Win 10 Pro x64

System Name	BEAST
Processor	Intel Core i7 920 C0 Quad Core Processor LGA1366 2.66GHZ Bloomfield 8MB LGA batch 3844A509
Motherboard	ASUS P6T Deluxe V2 X58 ATX LGA1366 DDR3
Cooling	CoolIt ECO A.L.C. 120mm radiator
Memory	G.SKILL F3-12800CL8TU-6GBPI PC3-12800 6GB 3X2GB DDR3-1600 CL8-8-8-21
Video Card(s)	Sapphire Radeon HD 4890 1GB 850MHZ 1GB 3.9GHZ GDDR5 PCI-E 2XDVI HDTV
Storage	SAMSUNG SPINPOINT F1 750GB X 2, WD2500KS 250GB, WD15EARS 1.5TB, WD20EARS 2.0TB
Display(s)	LG W2361V-PF Monitors 23” Widescreen LCD Monitor (23.0” diagonal)
Case	Cooler Master CM 690 II Advanced
Power Supply	Thermaltake Toughpower 600W Power Supply ATX V2.2 20/24PIN EPS12V Qfan 140MM Fan Active PFC
Software	Windows 7 Pro 64bit

Overclocking the PCI-e bus, worth it?

_33

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Alec§taar

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Azn Tr14dZ

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INSTG8R

Vanguard Beta Tester

_33

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Nitro-Max

Nitro-Max

regan1985

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natesuniverse

gOJDO

System Name	Hells Core.
Processor	Ryzen 9 5950x
Motherboard	Asus Crosshair hero viii (wifi) x570
Cooling	AlphaCool Aurora 420mm
Memory	Patriot Viper Gaming RGB Series DDR4 DRAM 4133MHz 32GB Kit
Video Card(s)	MSI Gaming X Trio 3070
Storage	Sabrent 1TB Rocket Nvme PCIe 4.0 M.2
Display(s)	Acer Predator XB271HU
Case	Thermaltake Core X71
Power Supply	Corsair RM850 80 plus gold
Software	Windows 10

Processor	yorkfield core 2 quad Q8200 3.2ghz 1.26v
Motherboard	asus p5Q SE
Cooling	akasa ak965
Memory	Kingston 1066 2x2gb 1104mhz 2.2v
Video Card(s)	SAPPHIRE HD 2600 XT DDR3 857/1078
Storage	2X Samsung spinpoint 500GB 7200 4x 1tb samsung eco 5400
Display(s)	2xSamsung P2270 22" Widescreen
Case	NZXT Hush Quiet Case in Black
Power Supply	OCZ StealthXStream 500w Silent Power Supply
Software	windows 7 64

Processor	AMD 5400+@3.4ghz
Motherboard	EPoX AD580XR/G
Cooling	CoolerMaster GEMINII
Memory	Buffalo Firestix DDR6400@970 5-4-4-9-12
Video Card(s)	2X HIS X1950pro
Storage	4X WD1600AAJS in raid 0
Power Supply	PC Power & Cooling QUAD 750

System Name	MONSTER
Processor	Core2 Quad Q6600 G0 @3.6GHz (9x400MHz) 1.35v
Motherboard	Gigabyte GA-P35-DS4 Rev. 1.0
Cooling	Home-made water cooling + 3x120mm 1200rpm case cooling
Memory	4x1GB Kingmax DDR2-1066 @ 1000MHz CL4 5-5-16
Video Card(s)	Asus EN8800GTS (g92) 512MB @core:783, shader:1944, video ram:1044
Storage	2x250GB Hitachi 8MB 7200RPM SATA2 RAID0 + WD 400GB 16MB 7200RPM SATA2
Display(s)	Samsung 226BW 22" 1680x1050 2ms
Case	Custom Made
Audio Device(s)	Creative Labs Audigy X-Fi XtremeMusic
Power Supply	Spire Rocketeer 600W
Software	Vista Ultimate 64 & 32 bit; Windows XP Pro 64 and 32 bit
Benchmark Scores	17645 3D Mark 2006, http://service.futuremark.com/compare?3dm06=4995796