ASRock PRO-850B
The current ASRock PRO-850B price from retailers, its key specifications, and how it performs for each job.
ASRock · PSU · ATX 3.x
Retailer photo of ASRock PRO-850B. View this offer in Where to buy
Works well for: Gaming PC
Trade-offs: Current price sits CAD 2 above the strong-value threshold (~CAD 93)
- Rated output
- 850 W
- 80 PLUS rating
- 80 PLUS Bronze
- Size
- ATX
- Modularity
- Non-modular
- ATX standard
- ATX 3.1
Move a slider and the page re-scores this product against the same market frame.
What does it cost today, and is that a good price?
Market confidence: LowAt CAD 95 the ASRock PRO-850B is priced in line with its CAD 95 representative market level. Only one retailer currently backs that price, so the level is a single data point rather than a market.
Limited market: only one retailer currently has a verified offer, so treat this price as a single data point.
Prices & availability
ASRock PRO-850B: current price and offers
Compare the offers we track for this model, across variants and retailers.
1 tracked offers · 1 retailers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| ASRock PRO-850B | Newegg | New | CAD 95 | 78 | 2026-11-08 | View offer → |
| ASRock PRO-850BMultiple variants available | Amazon Affiliate | Varies | Find on Amazon | Not tracked | No price snapshot | Find on Amazon → |
Prices are dated snapshots, not live quotes — confirm the final price at the store. New, refurbished and used offers are listed separately; used offers carry warranty and seller risk.
Performance and where it ranks
Two different questions, side by side. Performance compares what the hardware can do; Value compares what that capability costs at today’s price. A product can rank high on one and low on the other — that gap is the point.
Performance Balanced
How much it can do. Price plays no part in this ranking.
#46 of 106 graded Power supplies
- #43 CorsairCorsair HX1000i 50
- #44 ASUSASUS ATX ROG-THOR-1000P3-GAMING 50
- #45 ThermaltakeThermaltake Toughpower SFX Platinum 1000W 50
- #46 ASRockASRock PRO-850B 43
- #47 MontechMONTECH BETA 2 850W 43
- #48 PhanteksPhanteks AMP GH 850W Black 43
- #49 Cooler MasterCooler Master MWE Gold 850 V3 43
Value Balanced
How much of that you get for today’s price.
#4 of 107 currently priced Power supplies
- #1 ASRockASRock PRO-650G 100
- #2 Cooler MasterCooler Master MWE Gold 850 V3 88
- #3 ASRockASRock PRO-650B 85
- #4 ASRockASRock PRO-850B 78
- #5 ASRockASRock PRO-750G 77
- #6 ASRockASRock Challenger CL-650G 77
- #7 MSIMSI MAG A650BN 75
Performance Gaming PC
How much it can do. Price plays no part in this ranking.
#46 of 106 graded Power supplies
- #43 CorsairCorsair HX1000i 50
- #44 ASUSASUS ATX ROG-THOR-1000P3-GAMING 50
- #45 ThermaltakeThermaltake Toughpower SFX Platinum 1000W 50
- #46 ASRockASRock PRO-850B 43
- #47 MontechMONTECH BETA 2 850W 43
- #48 PhanteksPhanteks AMP GH 850W Black 43
- #49 Cooler MasterCooler Master MWE Gold 850 V3 43
Value Gaming PC
How much of that you get for today’s price.
#4 of 107 currently priced Power supplies
- #1 ASRockASRock PRO-650G 100
- #2 ASRockASRock PRO-650B 87
- #3 Cooler MasterCooler Master MWE Gold 850 V3 86
- #4 ASRockASRock PRO-850B 84
- #5 ASRockASRock PRO-750G 81
- #6 ASRockASRock Challenger CL-650G 76
- #7 ThermaltakeThermaltake Toughpower GT Snow 750W 74
Performance High-end GPU
How much it can do. Price plays no part in this ranking.
#46 of 106 graded Power supplies
- #43 CorsairCorsair HX1000i 50
- #44 ASUSASUS ATX ROG-THOR-1000P3-GAMING 50
- #45 ThermaltakeThermaltake Toughpower SFX Platinum 1000W 50
- #46 ASRockASRock PRO-850B 43
- #47 MontechMONTECH BETA 2 850W 43
- #48 PhanteksPhanteks AMP GH 850W Black 43
- #49 Cooler MasterCooler Master MWE Gold 850 V3 43
Value High-end GPU
How much of that you get for today’s price.
#14 of 107 currently priced Power supplies
- #11 CorsairCorsair RM750x 87
- #12 ThermaltakeThermaltake Toughpower GT 750W ATX 3.1 87
- #13 be quiet!be quiet! POWER ZONE 2 850W 87
- #14 ASRockASRock PRO-850B 86
- #15 ThermaltakeThermaltake Toughpower GT Snow 850W 86
- #16 be quiet!be quiet! PURE POWER 13 M 750W 85
- #17 MSIMSI MAG A1000PLS PCIE5 84
Performance Small form factor
How much it can do. Price plays no part in this ranking.
#44 of 99 graded Power supplies
- #41 CorsairCorsair HX1000i 50
- #42 ASUSASUS ATX ROG-THOR-1000P3-GAMING 50
- #43 ThermaltakeThermaltake Toughpower SFX Platinum 1000W 50
- #44 ASRockASRock PRO-850B 43
- #45 MontechMONTECH BETA 2 850W 43
- #46 PhanteksPhanteks AMP GH 850W Black 43
- #47 Cooler MasterCooler Master MWE Gold 850 V3 43
Value Small form factor
How much of that you get for today’s price.
#5 of 107 currently priced Power supplies
- #2 ASRockASRock PRO-650B 90
- #3 MSIMSI MAG A650BN 81
- #4 ThermaltakeThermaltake Smart 500W 78
- #5 ASRockASRock PRO-850B 78
- #6 ASRockASRock Challenger CL-650G 74
- #7 ASRockASRock PRO-750G 72
- #8 MSIMSI MAG A550BN 71
Performance Workstation
How much it can do. Price plays no part in this ranking.
#83 of 99 graded Power supplies
- #80 FSPFSP 650W VIC-650GM 67
- #81 be quiet!be quiet! Pure Power 12 650W 67
- #82 ThermaltakeThermaltake Toughpower GX2 600W 67
- #83 ASRockASRock PRO-850B 33
- #84 MontechMONTECH BETA 2 850W 33
- #85 ThermaltakeThermaltake Smart BM3 Bronze 850W 33
- #86 MontechMONTECH BETA 2 750W 33
Value Workstation
How much of that you get for today’s price.
#48 of 107 currently priced Power supplies
- #45 CorsairCorsair RM1000x ATX 3.1 74
- #46 ThermaltakeThermaltake Toughpower GT 1200W 74
- #47 ASRockASRock PRO-650B 73
- #48 ASRockASRock PRO-850B 72
- #49 NZXTNZXT C1000 Gold Core 72
- #50 MSIMSI MAG A650BN PCIE5 III 72
- #51 RosewillRosewill VSB650 70
These ladders follow the preset scenario shown above. Your own weights re-score this product, not the whole field.
What it is good for
| Scenario | this productCapability grade · Value at current price | Higher capability |
|---|---|---|
| Balanced (all-round)Weighted all-round view | GradeNo grade Value78 | — |
| Gaming PCScenario capability | GradeS Value84 | — |
| High-end GPUScenario capability | GradeB Value86 | — |
| Small form factorScenario capability | GradeF Value78 | — |
| Workstation & 24/7Scenario capability | GradeC Value72 | Higher capability Higher capability · Higher Value with current priorities ASRock PRO-650G B 85 +100% capability |
Balanced has no letter: it is a weighting preset, not a capability rubric. A grade answers “how well does this handle that job?” — price is never part of it. Relative Value puts the current market price back in.
Compare these grades with the full tier list
Trade-offs
Works well if
- Gaming PC is your main prioritygraded S for Gaming PC on the same rubric as the tier list
- Strong-value threshold: ~CAD 93CAD 93 is where Relative Value reaches 80 with Balanced priorities, in the 2026-11-08–2026-11-09 offer frame
- Nothing in this budget scores better with Balanced prioritiesno graded product within the 10% budget envelope around CAD 95 reaches a higher Relative Value with Balanced priorities
Consider other options if
- Current price sits CAD 2 above the strong-value threshold (~CAD 93)cheapest tracked CAD 95 against a CAD 93 calculated threshold with Balanced priorities
- Not the pick if Small form factor is your main useit grades only F there
Works well if
- Gaming PC is your main prioritygraded S for Gaming PC on the same rubric as the tier list
- Today's price already clears the strong-value markcheapest tracked CAD 95 against a CAD 100 threshold for Gaming PC
- Nothing in this budget scores better for Gaming PCno graded product within the 10% budget envelope around CAD 95 reaches a higher Relative Value for Gaming PC
Consider other options if
- Not the pick if Small form factor is your main useit grades only F there
Works well if
- High-end GPU is your main prioritygraded B for High-end GPU on the same rubric as the tier list
- Today's price already clears the strong-value markcheapest tracked CAD 95 against a CAD 111 threshold for High-end GPU
- Nothing in this budget scores better for High-end GPUno graded product within the 10% budget envelope around CAD 95 reaches a higher Relative Value for High-end GPU
Consider other options if
- Not the pick if Small form factor is your main useit grades only F there
For the selected scenario this is not a strong fit — the grade above is the reason, and the models below suit it better.
Works well if
- Small form factor is not actually your main job — Gaming PC isit grades F for Small form factor, but S for Gaming PC
- Strong-value threshold: ~CAD 92CAD 92 is where Relative Value reaches 80 for Small form factor, in the 2026-11-08–2026-11-09 offer frame
Consider other options if
- Not the pick if Small form factor is your main useit grades only F there
- Current price sits CAD 3 above the strong-value threshold (~CAD 92)cheapest tracked CAD 95 against a CAD 92 calculated threshold for Small form factor
- You are buying for Small form factor and want no asterisksthe rubric caps this grade: atx unit: it does not fit an sfx case
For the selected scenario this is not a strong fit — the grade above is the reason, and the models below suit it better.
Works well if
- Workstation is not actually your main job — Gaming PC isit grades C for Workstation, but S for Gaming PC
- Strong-value threshold: ~CAD 78CAD 78 is where Relative Value reaches 80 for Workstation, in the 2026-11-08–2026-11-09 offer frame
Consider other options if
- Not the pick if Workstation is your main useGraded C; ASRock PRO-650G reaches B. Check on Amazon.
- Current price sits CAD 17 above the strong-value threshold (~CAD 78)cheapest tracked CAD 95 against a CAD 78 calculated threshold for Workstation
- Value for money matters more to you than this exact modelASRock PRO-650G holds Relative Value 85 against its 72 for Workstation. Check on Amazon.
Every line states the fact it was derived from, for the scenario selected above. Thresholds are calculated points on our value curve — information about where the maths turns, not instructions about what to pay.
Similar options to the ASRock PRO-850B
Chosen for Workstation
More head-to-head comparisons in this category
Upgrade planner
Judge the change in the active scenario, then make the cash gap explicit.
Using page scenarioWhat are you upgrading from? These are the axes we compare on, and where this product stands in the current market.
Capability differences are expressed as tiers and index points, not as benchmark percentages we did not measure.
Specifications and compatibility
What this product is, and what to check before it goes into your build.
Power / Interface
- Rated output
- 850 W
- +12 V output
- 849.6 W
- 80 PLUS rating
- 80 PLUS Bronze
- ATX standard
- ATX 3.1
Show all specifications
Warranty
- Warranty
- 3 years
- Manufacturer part number
- PRO-850B
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-11-08–2026-11-09
What to check in your build
A case that takes ATX power supplies
The size is set by the case: ATX cases take ATX units, small cases take SFX (some also SFX-L).
140 mm of power-supply bay, plus room for the cables
Case makers list the longest power supply the bay takes; modular cables need extra space behind the unit.
Found an error? Report this specification Email the field, corrected value and an optional source.
Compatibility guidance is practical help, not a score. Missing data is shown as unknown, never invented.
Summary
ASRock PRO-850B offers a balanced view across an all-round mix of priorities. It ranks #46 by capability in the current modelled field. Its clearest measured strength is rated output 850. The main limitation appears when Small form factor becomes the priority, where it grades F.
ASRock PRO-850B offers S-grade capability for Gaming PC. It ranks #46 by capability in the current modelled field. Its clearest measured strength is rated output 850. The main limitation appears when Small form factor becomes the priority, where it grades F.
ASRock PRO-850B offers B-grade capability for High-end GPU. It ranks #46 by capability in the current modelled field. Its clearest measured strength is rated output 850. The main limitation appears when Small form factor becomes the priority, where it grades F.
ASRock PRO-850B offers F-grade capability for Small form factor. It ranks #44 by capability in the current modelled field. Its clearest measured strength is rated output 850. The F grade is the decisive limitation for this workload.
ASRock PRO-850B offers C-grade capability for Workstation. It ranks #83 by capability in the current modelled field. Its clearest measured strength is rated output 850. The C grade is the decisive limitation for this workload.
FAQ
Why does Relative Value change when I choose another scenario?
Each scenario changes the weights applied to capability, price and the other published factors. The hardware facts stay fixed, but the value question changes, so its score and rank can change too.
Why can Amazon appear without a tracked price?
Amazon listing snapshots can participate in Value while fresh. We show Check on Amazon instead of its price; confirm the current price and availability at the store. When no current listing snapshot exists, Amazon is a search link only.
Useful links & sources
offer frame 2026-11-08–2026-11-09 · formula psu-value-v6.1 · facts facts-2026-11-09 · Relative Value is an estimate from our current dataset, the selected weights and dated market prices — not an official product rating and not a price forecast. Target prices are calculation thresholds, not predictions. Methodology We are not a shop. Affiliate links may earn us a commission; they never change the calculations or the ranking.